How to Reseat / Lap Valves (Basic Valve Job)
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- Опубліковано 8 лис 2010
- In this video i'm explaining how to reseat or lap valves in a flathead or overhead valve engine. Also can be called a valve job, but this is not a complete valve job. I also used to much valve grinding compound, it does not require a whole lot. Usually when a engine needs this done is when a engine has low compression that is found to be leaking around the valves, or sometimes a engine will backfire do to the valves not closing completely/properly. Thanks for watching.
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Never knew how to do a valve job and I been twisting wrenches for 20+ yrs. I do now though. Good Vid Dude!
Thanks so much man, learning about this saved me hundreds of dollars. Rather do it myself than take it and have someone else do it, take a week and a half, and charge me bigtime. Rock on!
My husband and I were really enjoyed watching the video. You are a good teacher. We had tried to set values on 16.5 Briggs. Found out they were sticking, which caused the back firing. Didn't know how it worked until we watched your video. Great job explaining it. Thank you for being on You Tube with these videos.
I never knew how or what was involved for reseating and lapping valves so thanks for taking the time to show that.
your welcome, glad to help out, thanks for watching!!!
@@fnaguitarplayer9 That is called a "valve lapping operation".
"Valve grinding" requires a valve grinding machine ($$$) AND a valve seat grinder.
(More $$$). For most light valve jobs, LAPPING is normally good enough.
THANKS YOU !!! after 6 hrs of videos you showed what I needed to know. How to get the valves out of a Briggs OHV . That one little trick is what I needed. You are very good and I truly Thank You !!! for making these videos. You have helped me a ton.
thank you, i just cant get anyone to explain this stuff to me so im learning little by little from guys like you that take time to make the films and post them, one day i will rebuild a whole engine, i already fixed my variator :) im pleased with that so far .
Your welcome! I hear ya! Thanks for Watching!!!
You explain this stuff pretty well, better than most I've seen on YT. They've been helpful as I attempt a first time rebuild. Please keep making these videos. They are appreciated
A few weeks ago I bought a couple of vintage Briggs and Stratton flathead engines.
Neither one worked when I got them but I cleaned the carbs and repaired the starter
clutches on both and got both of them running. Thanks for all the help.
Your welcome, glad to help out. Thanks for Watching!!!
Thanks for showing this video on how to lap the valves. I just got the same tool and compound and have an engine waiting but wasn't sure how to do this - thanks again!
thanks for making the video. If like me, you don't rebuild motors, this beats reading a manual. I tore my 14 hp Kohler apart this winter and so far have seen every aspect of the rebuild on you tube. I love the internet!
Your welcome! I have rebuilt several motors, and i do have a 4 part video on rebuilding a 12.5HP briggs and stratton, which covers alot of briggs engines (all small engines are very similar in construction). It does come in very handy! Thanks for Watching!!!
Thanks, no problem! Always glad to hear that a video helped someone! Thanks for watching!!!
Great Video! I'm doing my first rebuild (Kohler 181s) and watching someone do this is SO helpful!
Thanks for making this video. I need to do this to a car engine and I only had an idea on how to do it. It doesn't look too difficult and it's worth a shot to save an engine. Thanks again.
Great video. You're a better teacher than you give yourself credit for. Thanks for the video - please make more!
You did a good job...you put another brick in the wall of knowledge!
Dude you're a top bloke. Good to know there are people like you out there :) I've gotta go do 24 of these now so I best be off
Glad you like them! I try to keep things as simple as possible but still technical enough to get info out of it. Will Do! I can't do much this time of year, I hope to make alot more videos this summer! thanks for watching!!!
Well if anyones goin to use this vid for learning purposes then go on and do that `cause the guy does know what he´s doin`. His advise and instructions are advisable to others. Have no fear you can deal with your valves here. Titanium valves are used in modified engines or newer cars that have alot of horses, Valves as such are usually used for rpms over 8000rpm thats why they´re also light weight. And yes grinding them is NOT a good idea at all. 6 valves would run about 800-900 bucks.
Recommended this video on my channel because this is a very good explanation on lapping valves. Hope you get a lot more views! I'm watching this because I am getting ready to do a valve lapping job myself on a Briggs flathead and I wanted to review how it's done. Thanks
thanks. i have a 4 foot fluorescent light right above my workbench, really helps alot on these videos! What i plan on doing soon to my workbench will give more contrast on the videos, if it don't work out i'll go back to how it is now. thanks for watching!!!
Very informative. Rebuilding an early-1990's vintage 5hp flathead because I got a little tired of it not having any compression
+Charred Steak I hear ya, yeah most of the time valves are the cause for low compression in flathead motors. Thanks for Watching!!!
No problem! I hear ya, this is actually one of my favorite things to do on a engine, i don't know why haha thanks for watching!!!
Excellent video. Covered, lapping, removing valves and installing valve springs.. Can't go wrong..
Appreciate that! Thanks for Watching!!!
Very good thanks for the tips. Keep teaching us with such simplicity I'm no mechanic and now I can do that.
Your welcome, Thanks for Watching!!!
You usually do have to twist and push down most of the time, I've always had to, unless the guides are completely worn then they drop right in. Be sure to put some STP or oil on it, 2 purposes, it helps it slide in and keeps it from starting dry. thanks for watching!!!
Thank you for sharing this video. I have been working on my own cars for many years but never knew how to lap valves. Your video is excellent! I drive a 1966 Chevy Corvair Monza and hope I don't need a valve job, but at least I understand how it's done.
Your welcome! I hear ya, its simple really, but one thing i didn't talk about in the video is you have to make sure your valve guides are good, if there is to much play the valves still won't seal perfectly. I hear ya! Can not beat older vehicles. thanks for watching!!!
no problem, glad to help! thanks for watching!!!
Thanks mate for taking the time to do this video. Nice and clear
hmm good question. i don't usually go by hours, i usually only have to do this when i rebuild a motor. but briggs says most engines should last around 2000 hours of use before needing rebuilt, so i'd say to do preventive maintenance (stop valves from burning) maybe do it after 1000-1500 hours (guessing), then again when it needs rebuilt. some motors can last a really long time. just depends on how well there taken care of. sorry i could't be more specific. thanks for watching!!!
Great video helped me a lot with my kohler rebuild! Thanks for taking the time to explain this!
+John Rhodes Appreciate that, always glad to help out. Thanks for Watching!!!
Enjoyed the vid. Ive got an old Sears snowblower (1962) with a tecumseh engine that Im going to rebuild this summer. Thanks!
You have been a big help because i have ask you some questions awhile back about what valves clearance settings for overhead valves and a couple days later you reply back to me with the right settings number i have had that lawnmower for over a year it wouldn't never started up as soon as i sets the valves the same way you told me at top dead center it ran like a sewing machine Thanks man
Freddie Johnson glad to help out, if you ever need anything else feel free to ask! Thanks for watching!!!
your welcome, glad to help out thanks for watching!
Your explanations were actually pretty clear to me,
appreciate it! your welcome, thanks for watching!!!
glad it helped you out! Yeah the guides is a lot more complicated, usually a machine shop will have to do that, unless you have a milling machine and press in your garage. I'm not really sure how much they charge to do it, you might call around just to get a idea. Thanks for Watching!!!
@michaelovitch I do plan to do the intake and exhaust ports, and grind the head and block so it gets better flow. I'm currently working on another briggs just like this one, check out my other video: briggs restoration project. and it is going to have all kinds of modifications done to it to get the most out of it i can. thanks for watching!
Good job,we use to do this in shop class,good to see some body sticking to the old school method.
Lcy Grl Thanks! I hear ya, i think you get better results because you can actually feel and hear it cutting, the drill method is faster and more aggressive. But it works as well. Thanks for Watching!!!
your welcome! I hear ya! This would have to be my favorite part of engine rebuilding, I don't know why haha thanks for watching!
@destro513 yeah that is true, i forgot to mention that in the video that you should pick it up now and then. it helps to keep the compound around the surface evenly. thanks for watching!
thanks for that! i hear ya. its a pretty simple process, but on flatheads you have to watch the valve clearance, because its hard to adjust on flatheads, because if its to tight, you have to grind the valve stem, or if its to loose you have to weld it up then grind down to spec! its a pain, but most of the time its within spec and you don't have to do that! thanks for watching!!!
thanks! Its a fun hobby to get into! Use a wire brush (cup type) on a drill, don't put to much pressure down, let the brush do the work. Sometimes helps to soak it in a cleaner like carburetor cleaner before wire brushing it. Just don't do it with the valves out, as it will scratch up the seats. and make sure the piston is all the way up, so you won't scratch the cylinder. thanks for watching!!!
Sir , personally I think you are doing very good at explaining different things
Appreciate that! Thanks for Watching!!!
lol, because my experience, i did not chance my valve guide, then my spark plugs always busted, and alot of smoke still coming out the exhaust pipe, thank you bro, and nice vid..
@SirSmighty thank you. it is possible, can't say until its tore apart, it may have a burnt valve, and if it burns oil too, then it needs new rings (rebuild) but yeah, take a look at the valves, might just need reseated. if its overhead valve (OHV) then check valve clearances, it can cause that to if the they are set to tight and the valves aren't closing all the way. or might be a bad compression release. list goes on haha thanks for watching
i hear ya! glad to help out! thanks for watching!!!
Yeah sure, message me, answer away, keep in mind that it is hard to diagnose certain problems without actually working on something, but i will try my best to answer your questions! thanks for watching!!!
oh wow! haha i'll have to keep that in mind when i run out of compound!!! thanks for watching!!!
Very helpful... wow didn't realize it was that simple... thanks so much
Your welcome, thanks for watching!!!
glad to help! thanks for watching!!!
this vid has helped me loads while im rebuilding my kohler k301 ,done valves and piston rings now runs as sweet as a nut,thanks for sharing,,, supergem
supergem Glad to hear it helped you out. Good to hear! Always glad to hear when a rebuild/restoration goes good. Your welcome, thanks for watching!!!
I will when ever i rebuild the engine, this was just a demo on reseating valves. thanks for watching!!!
Gunna be rebuilding a head soon and this is the best vid ive come across. Big thanks.!
I hear ya! Appreciate it. Your welcome, thanks for watching!!!
Yeah, I call them clips, i know what your talking about, I think i talked about that in my 4 part rebuild video, or at least talked about how do it, but on OHV motors that type of compressor usually will not work, or i should say I have had no luck with it, as you seen in this video i didn't even use a compressor on the OHV, but if it has clips you will need the C clamp looking valve spring compressor, so it will wrap around. The 19063 is perfect on flathead motors though. Thanks for watching!!!
Nice job. Thanks for making the video. Really helps out people such as myself.
@TheKillgore521 thanks for the tip, i've never done anything with titanium valves before thanks for watching
@arturomartinez1983 a finer grit will give a better finish, rougher grit is good if you have bad pits. Usually what is done is a rougher is used first (if necessary) then a finer to finish it off, like sanding. Mine is 34A grit which is a universal grit, its Permatex brand, i've never had any problems with it, seats/valves come out looking new. I'd recommend what i use (34A) hope this helps, thanks for watching!!!
@wc4pwned yes there is alot of play in these valve guides, when i rebuild this engine i do plan to install new guides. they tend to wear out alot on these. thanks for watching!
9 years in, this video is still very helpful, thanks
I hear ya! Your welcome, hanks for Watching!!!
Really appreciated your explanation. And showing how to do it. Great help!
+Yvonne Behrens Your welcome, always glad to help out! Thanks for Watching!!!
great vid, thanks a ton... now i get to start on my motorcycle... all 16 valves... fun
You're wrong about one thing.... you said you're not the best about explaining things. I think you do an unbelievable job of not only videoing by yourself but explaining. These are some of the best UA-cam video How To's, I've seen and you sound like a young man. Good for you.
haha I really appreciate that, I try to keep things as simple as possible. Yeah I'm 22, been on here since 2008 i think it was, thanks for watching!!!
I restored a 1973 JD 140 H3 Garden Tractor but had to send the engine and carb off to be gone through since I didn't know enough about it. I am not happy having someone do that kind of work for me, especially on a hobby project. I'm trying to learn as much as I can online and your videos are a lot of help. This winter, I plan on pulling the engine to clean and paint it again and see about checking gaskets and seals for oil leaks.
I know what you mean, you sound like me, i'd rather do all the work that way I know exactly what has been done to it/how it was done. You probably have already watched it but i do have a 4 part video on rebuilding a 12.5 horsepower briggs, but its similar on any brand or size small engine. Heard that, sounds like a good project for winter.
You did just fine, man. I'm feeling confident I can grind the valves now. I would like to replace the valve guides and I presume that's a bit more involved.
i mainly work on small engines and when valve seats get worn to much they are just replaced, i've never seen oversized valves for SE, if i work on a car engine that needs it i will definitely make a video! thanks for watching!!!
you will have to do this with new valves, and/or new seats to make sure they are sealing properly. thanks for watching!!!
@TheFace3701 not a problem! yeah its pretty simple. good luck on your project. No problem, thank you for watching my video!
turned out, the carb was fine, save the seal between the tank and carb, the flywheel key had sheared, so it was about 60 degrees off on the flywheel. 95 cents and about an hour of work, she runs like an absolute champ.
No problem! Yeah, the purpose of 2 is in case your valves are in rougher shape (pitted), you would use the coarse first then go back over with the fine, think of it like sanding wood, you start with a coarse grit to do the "rough in" then you finish up with a fine grit to smooth it out. If you don't use a fine after the coarse the valve may not seal properly, I use a medium grit, just one step, i've never had any problems. But the 2 step method is best. Thanks for Watching!!!
Thats a good idea! Look it up, its what your supposed to do in small engines, and works fine in any engine. I don't like running a drill, it can wear your valve guides. thanks for watching!!!
Great Video. Thanks for sharing. Very through and very good explaining things. All the best to you!
Your welcome, thanks for watching!!!
makes sense! i always use to much of anything. my dad told me i use to much compound haha I realize now that a little dab is all you need, same with grease on lawn mower wheel bushings (plain bearings) don't need much at all! Thanks for Watching!!!
thats how i've always done it, after reseating the valves you check clearance, then go from there, if the clearance is to small you grind down, if its to big, you can either reseat it more (if its just a few .001" off or welded the valve stem and grind to spec. thanks for watching!
thanks! appreciate it! I'm always making some type of how to video haha thanks for watching!!!
great video, straight to the point, without the life story... Awesome video!
+doug h Appreciate that! Yeah i try to stay the point, but every now and then i might get sidetracked! Thanks for Watching!!!
That was a good job, you explained it well.
This was very helpful. Many thanks for taking the time.
You did a great job explaining and showing. Thank you.
+Toby Tollefsen Appreciate that, your welcome! Thanks for Watching!!!
I used a good sized dab a hot glue and a flat drill bit in a drill, saved a lot of work
Thank you for video. A nice simple explanation is always useful.
I did get a lot of information from your video thank you
@seapeddler that probably would be better. i'm old fashioned i'm not big on modern stuff. and for lawn mower engines i would say this is all you need. your 100% right, don't get me wrong. thanks for watching!!!
i don't know a whole lot about machining, i do hope get into machining parts and boring engines eventually. thanks for watching!!!
@FuzzyMcButterWink i hear ya, glad my video helped! thanks!! and thanks for watching!
What a great job explaining the procedure...I'm rebuilding an H60 Tecumseh and this is the first time I've ever broke down a small engine. It comes off anAriens snowblower and I really want to bring it back to life. One question I have is how to get te burnt carbon/oil off the top of the valves and piston head. Thanks for any help. Keep up the great work...
@wethepeople0001 thank you very much. there will be alot more how to videos this spring/summer. thanks for watching!
@rickjm1001 thanks. i can't put this motor back together yet, the block needs bored out and sleeved. But if you want to see a teardown and rebuild of a 12.5 horse flathead, look through my latest videos i did a 4 part series with a lot of detail on removing crank and replacing rings. I will do more on this engine later on though, just cost to much money to have sleeved. thanks for watching, and check out the other briggs videos i have on here.
haha I can only imagine how hard those are to work with! I've seen people use a long bar that hooks to the center bolt where the rocker arm bolts to it to get leverage, as long as its not to bad you might be able to lap it down enough, hard to say. thanks for watching!!!
@billyrowe0064 Yes it is a Briggs and Stratton, its a 5 horse (model 13), this came off a mini bike, but they are very popular on go karts and mini bikes. They are also found on tillers. They are some of the best engines ever made, any of the briggs flathead engines. thanks for watching
thanks! appreciate it! Thanks for Watching!!!
Thanks for making this, I learned a lot.
Oh contrary, you explained it just fine. In fact I like your videos because you're to the point without the bs like some that like to here there self talk. Thanks bro
Thanks! I try to stay focused on the video and not talk about non-related stuff. That aggravates me like crazy, try to watch a video on how to do something and someone talks for ever about nothing haha Thanks for Watching!!!
@555engineer no problem. glad to help. Thanks for watching and commenting!
i hear ya! that happens quite a bit. can't beat that, glad you got it going!
thanks! That sounds like fun! haha thanks for watching!!!
Yes you will still need to lap the valves, even with new valves and/or new seats, this just ensures a complete seal. I'm in WV Thanks for Watching!!!
Do you have a video on how to separate halves of engine to do the gasket? I have a Cub Cadet 16 horse single cylinder overhead valve engine. The Briggs engine looks close.
I never have done any porting, on these flathead motors your limited to what can be done, because the fuel/air mixture goes through like 4 90 degree bends to get to the cylinder. Another common thing is increase flow by rounding over the part between the valves and cylinder wall, so the fuel/air can curve over and "pour" into the cylinder. thanks for watching!!!
@frank48164 i hear ya. i'm not a big fan of tecumseh engines, but they are good engines when they are running good. i always have carburetor trouble with them. i prefer briggs over any brand. yeah its pretty simple, but the hardest part is setting valve clearance on flathead engines, OHV is no problem. They tend to build up carbon, you should see a 3 horse i was working a month ago, it had a quarter inch of carbon in it haha no problem, thanks for watching!
Heard that! yeah the intake valve is usually alot cleaner than the exhaust valve, i did a video on the older 2 piece carburetors found on like a 12 horse briggs, vertical shaft though, i don't have anything on the type of engine in this video (5 horse). thanks for watching!!!
Not really sure on that, i've never worked with titanium valves. Thanks for Watching!