Refinishing and Flattening Engine Heads at Home with Sand Paper
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- Опубліковано 6 лют 2020
- Resurfacing an engine head using sandpaper and a sheet of glass! About an hours worth of work and the engine head was looking much better!
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Thanks very much. Especially like the idea of using water to hold the paper on.👍
Yep, makes it easy to change!
Very informative video Randy! Thanks for sharing it. I always wondered if machining was needed to get it point perfectly flat but there you just showed us the other way of doing it! Keep it up!!!
Of course taking it in to have to done is easier, but you can definitely do it yourself with a little elbow grease and maybe an hours worth of time. Thanks!
That sound is so satisfying
Thank you very much R DALLEN TEACH ME DO RESURFACE CYLING HEAD AT HOME ❤
Glad to help!
2.8 Chevy , I'm about to do mine
This method works fine.
I did my block after i had my sleeves drop and flattened the head.
Both aluminum
I started 600 wet and finished 800 wet
Used water and dish soap and had no build up.
Run a cometic mls x head gasket with 27psi boost on a k24 engine for 8 months with zero extra pressure in coolant
system.i only did it this way because machine shop said 3 month wait
I spent 6hrs in total and have a perfectly flat deck on block and heads.
One thing i did differently is figure 8 patterns to not gave inconsistent amounts of material removed.
I also saw another comment about flipping the head around so your not putting pressure on 1 end.
You could see it when you started as it took more material off the side closer to you that was getting more pressure
I'm about to do another k swap in my car, (the head warped when I blew it up the first time.) Then a month later I started to have pressure in my coolant until the engine eat crap. Is your car still working? Any issues at all or advise? I want to do this car right this time.
@raucouspie3045 mine is still rocking great.
Making 28 psi using a siruda folded layer head gasket.
No extra pressure in coolant system.
I used a bucket with dish soap and warm water.
Do a few laps then dip the block in the bucket.
I had no build up on the paper.
Also faster even strokes/figure 8 pattern.
@@audirx8 you are awesome my friend.
Good point on flipping the head around, I thought the exact same thing, these are 2.8 Chevy heads I'm about to do the exact same ones after porting and polish
Thanks a lot a life saver for a head that has to go back on tomorrow.
Like the shop. subscribed. thanks.
Nice.... im not an expert or anything but maybe it would be a good idea to flip head. To get same pressure on both sides when your sliding it.. .. awesome video though thanks..
That’s probably a good idea!
Hi.
On modern common rail turbo diesels would you advise to spray Hylomar onto gasket prior to installation?..
Great job. I resurface my own heads using a large machinist file. It is very true and I can get it down to less the 2 thousandths. I picked up the file at an auction so I can't tell you where to buy them but it is faster than sand paper.
SMH
@bad406camaro I would like to see that in action,lol
Nice video and info Bro!!! ❤Especially for us on lil budget Thanks
Thanks!
Looks great, I do the same thing because I can't wait weeks to get a head machined.
Not to mention saves money! Just takes a little time.
@@radozemanWe're you get the glass bruh?
@@troybrake5686 most hardware stores will have pieces of glass either that Amazon or eBay
@@radozeman I remembered I have a few pieces of granite at my mom's, hopefully there still there, I believe that will work good also, we have a surfacing machine in the shop at my work but it's not setup right, my heads are not warped I'm just wanting to get the surface consistent for the gasket to seal, I have a few pits
Where do you get glass like that?
What grit sandpaper did you use
Thank you for the video, very interesting, i want to ask you how do you determine how much material is lost, can i use the same tipe of gasket, or i need another spec
I just sanded until I got everything and it was flat. I doubt the little that is taken off will be a problem for any gaskets.
Depends on several factors... type of engine, how bad it's warped (i.e. how much material has to come off), and what you're trying to achieve (is the engine going in a race car or a beater/daily driver).
Nah. You need to use a cinder block. Just knock of the bigger pieces of gravel and your good to go. I sometimes throw a little Crisco on it. Head gasket seals fine. Just like yours will
Honestly seen it said sandpaper and I went yes I’m not the only person that done this 😅 I really do love the keyboard warrior mechanics do 🙏🤗
It works! Just needs to be flat!
Did this, only had a small piece of glass to work with and could only go back and forth two inches or so, made the mistake of using old sandpaper first did several rubs back and forth and it made it worse. Then I got some new sandpaper and had to do a lot more than I would have to get it to where it was. Spec was .002 or less, got rid of nearly all the places I could get .0025 to pass under previously, only have one oil galley where I can barely fit .002 under. Must of taken like 30 measurements every which way, before calling it and figuring it's just that one spot.
shoulda used 80 grit then 120
Awesome video 👍👍
Thanks!
Hello, can you please tell us what is the pink coloring on the cylinder surface? Corrosion inhibitor? Also why is it important to use moistened sandpaper instead of dry?
The pink coloring is for checking for cracks, I forget the name of the stuff, but it is a two part system you spray on the head to check for cracks. The sand paper needs to be wet to “stick” to the glass
It's the magniflux
@@radozeman I just tried this and I can't get the paper to 'stick' to glass with water at all.
What kind of sandpaper material for a aluminum head ? Aluminum oxide ok ?
Yes it is! I like this stuff myself: smile.amazon.com/3M-26080CP-P-G-No-Slip-Advanced-Sandpaper/dp/B00HM96R22/ref=pd_bxgy_img_sccl_1/130-3774895-0059358?pd_rd_w=h8j0P&content-id=amzn1.sym.7757a8b5-874e-4a67-9d85-54ed32f01737&pf_rd_p=7757a8b5-874e-4a67-9d85-54ed32f01737&pf_rd_r=37ESXEPB20R1NJW858C4&pd_rd_wg=4joyg&pd_rd_r=25f37a29-9a66-47c8-b6b2-d2d1941419ad&pd_rd_i=B00HM96R22&psc=1
Nice video I expecte that head is cast iron, be careful when doing this with aluminum use a 1000 or 600 grit you can use oil or paraffin. I didn't catch the feller gauge size but I think not 15 thou moor like 1,5 thousands
Okay I'm that guy. I do this backwoods with a heavy plate that's milled VERY flat. I do it that way because I have to jig the head "flat". I also do it because the head is heavy and not an even weight the plate is an even weight and gets a more even result. I use small circles. Later and have a blast.
I would love to know the cause? Did the head bolts stretch, was the head warped, etc?
I know the water pump went out at some point on this, so that could be why.
@@radozeman ok, so possibly overheated. Seems likely.
can you point me to the exact glass you use to re-surface your projects i'm worried if i choose the wrong material ill make things worse if i chose the wrong material please help me get going in the right direction my surface doesnt have much room for ERRORS please point me to your NUMBER ONE CHOICE.
I’d suggest 1/2” thick piece, really doesn’t matter what kind.
Thank you. You saved me a lot of $$! I don't have.
Would it be a bad idea to use a piece of polished granite instead of glass?
As long as it is perfectly flat!
I have granite counter tops.ill have to do it when ole lady is at work
look up granite surface plates they're accurate to within +/000050.
Great tutorial. Question: How thick is the piece of glass you used? I'm trying to find some 1/2 inch pieces but it looks like most places around here only stock 1/4 inch :(
Try Amazon or eBay, I’d recommend 1/2 if you can, 1/4 should be fine though, just needs to be flat.
@@radozeman I feel like if you're sanding down surfaces to refinish them, but they're already flat, 1/4 inch is ok; but if you really need to flatten a head that isn't, you probably need 1/2 inch. I was just going to clean up engine block surfaces with 1/4 inch glass.
Where did you get the glass from?
I don't recall, you can buy sheets of glass at most hardware stores, Amazon, etc.
Use dishwashing liquid it adds cleaning
That's a good idea!
💪💪💪💪
Is your head iron or aluminum?
Iron
The exhaust seats look like they're completly pounded in
Just the way they are on this head I guess
@@radozeman even in the few short shots I could get a clear view, I can see they are not quite right. I'm not trying to give a hard time or make a fuss on your content, at all. But repairing/remanufacturing cylinder heads is something I have many many years experience in and do almost daily and those looked pretty pounded from here. I mean, if the install heights measure up correctly then I have no problems eating my words, wouldn't be the first time lol. But from what I just saw, they did not look right.
Other than that, keep up the good work👍
you need a machinist strait edge.. there not $$$..
Yes they are the good ones 0.001” accuracy straight across are a lot of $$$
@@justinw523 no there not, i have several under $200, that is NOT $$$, thats cheap. i have 3 that are +/- 0.003 and they are about $80 each, more than capable of doing the job. you just have no clue at all what you are talking about.
They’re
Could you attach the head to a saw saw?
Too heavy I would think
Take the floppy rubber thing off the end first and it should be good😂
Instead of glass can I use a slab of granite???
The idea here is using a reference surface. Some folk get angry at what is shown in the video (I was a mechanic myself so I can say that) because they don't know how much of a common technique this is in engineering/machining (I'm now a mechanical / design engineer). The tricky bit is knowing if your reference surface is flat enough. There is nothing 100% perfect in this world, everything has tolerances. Even surface plates for this purpose have tolerances on flatness. So for a "DIY" method the flatness of the material will mostly depend on the manufacturing process of that material:
Industrial glass usually comes off big roller mills, which produces flatness sufficient for this purpose. Glass is also "cosmetic" - as it's made for construction (e.g. facades of flashy new buildings) it would be visible if there are imperfections. Though during the cooling process warp can occur, but the manufacturer will try to keep this to a minimum in their own interest.
Granite would be cut from natural stone and then ground flat. Industrial tiles are probably pretty good, masonry stuff can be hit and miss depending on the source. I.e. some old gravestone might have been made by hand or an a wobbly machine and therefore not be good enough.
Laminated wood board also works though if stored incorrectly (bent over longer periods of time, moisture) it might end up warped, this is less reliable.
Thicker materials are less susceptible to warp so changes are they are flatter.
There is an interesting video on the subject of flatness ua-cam.com/video/gNRnrn5DE58/v-deo.html&ab_channel=MachineThinking highly recommend that :)
the machine shops are raping the average joe, that simply wants a strong dependable build that you can do a lot of that work at home.
And as long as you are not hot rodding it, this will work perectly fine!
The ocd freaks will say to take it to the machine shop, but if it's flat and within specs what does it make a difference? Unless your building a nitrous or boosted motor you,ll be fine.
Exactly! Unless you plan on doing something stupid with this motor, which I don't why you would with this motor.... it'll be perfectly fine!
boosted motors are not checking the heads a lot of the timed
This might be better than using a block of wood because that glass is heavy and perctly flat and you sanding the whole head at once.
Exactly! I would not trust wood!!
if the flash did diy machine work
okay.
rewatch it.
your welcome 😂
watch out for warpi-comments.
blue it
Loud
What’d you say?!
Dang it! Forgot to lick the Cheetos off my fingers. Stupid!
🤦♂️😂
But, I want to keep eating my Cheetos. :(
Rotfl 😂
OLÁ. 24/12/23. Com uma régua idêntica a sua eu apanhava da professora por mau uso de régua. Sugiro usar uma "regua de precisão legitima", aprender a usá-la com perfeição e descubriras que a posição que mais deformam os blocos e cabeçotes nem aferistes no video. ABRAÇOS Roberto Udo Krapf
Now do this on an engine block.
Could suction cups on the glass, sand paper on the other side, might need get a different size piece of glass?
Exhaust seats are bad
There not great that's for sure.
I would've started out wit 80 grit an go to 100 grit an then finish it out wit 120 grit to save more time
That probably would have been better yes, I thought it was flatter than it was and won't need as much.
this..... hurts to watch
U mad hes savin money? Ppl been doing it like this for a long time.
It works though
And long as the head is truly straight and flat it will be fine. I plan to do this to my Mercedes M103 head.
Why does it hurt you to watch?
3M MAKES rolls of sandpaper with self adhesive on it so you don't have seams and uneven adhesion.
True, it is slightly more expensive, plus it is easy to remove this way.
@@radozeman for sure it is definitely cheaper and easier in small sheets. I meant to say great video as well great content. Great way to clean up resurface heads preparation for installation. While on subject I came across a interesting head related video this morning it details how badly Scotch brite messes up surface when used to clean up the heads. I've never done this but I've seen people do it a lot, I didn't realize how much scotch Brite can actually affect the surface of aluminum heads,intakes etc. etc... 3M claims iScotch brite doesn't damage the metal surface baloney. Here's a quote from them found in some advertising literature "Scotch-Brite™ Discs quickly remove unwanted surface imperfections without cutting into the metal like fibre discs or flap discs."
ua-cam.com/video/eX4Hf1PwG7U/v-deo.htmlsi=F52oj033ELzCmdTJ
I think i would have started out with about a 150 grit to get a quicker cut and then go up in grit to get the finer smoother cut. Great video 👍🏻.
Given how far off this one was, I probably should have yes!