1972 Triumph GT6 - Part 87 - Rocker Shaft & Valves Assembling
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- Опубліковано 23 гру 2024
- With the engine block mostly assembled and camshaft timing done, it is time to assemble the head. The rocker shaft needs to be replaced and as it turns out some of the rockers too. Let's also install the new valves into the new valve guides and freshly installed hardened seats.
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Great reference video for those reassembling a GT-6 head from scratch.. I used to tap on the top on a newly installed valve but I never assume that others have not got their own method of checking that the collets are seated securely.
The intro has a Pavlavian effect on me. I smile when I see and hear it.
It always reminds me of the time when we came to pick up the car. I can't believe it was more than 5 years ago now.
Hi Elin, I'm glad you could put together a decent set of rockers. I guess its the shaft that takes the brunt of the wear and the bore on each rocker fitted correctly. Wouldnt have been much fun to dig down through the snow (ice) to your other spitfire.
You'll soon be starting it up, well done and good luck from Spain!!
It's always interesting watching others work. When installing new valves we would always grind them in to ensure the valves would land correctly into the machined head.
That was done at the machine shop.
@@RustyBeauties It seems so but at the start when you organised them in order the parts weren't seen to have been numbered or placed into specific positions apart from intake and exhaust. It wasn't revealed till later that they also were at the machine shop. Nice to know they were matched to where they were lapped in
.
Hi Elin, You will recognize me as the one that will comment on the great music that you play on your channel and Tom agrees. Tom is the one that makes the intelligent comments car stuff, as he has worked on way to many foreign and domestic cars. My car knowledge is limited, though Tom does make me do the nasty dirty stuff on my trucks and he checks that I do it correctly. He use to be an auto/diesel instructor/pro tech, at a skills center. He also plays a mean banjo besides other instruments and is a Luthier. Loving the ragtime piano today!
Hey Elin… I know that editing takes a lot of your time but please, don’t stop!! Holding the beat with the pulley was…. Priceless!
Brilliant video I have the same job to do so these are priceless! Thanks Elin
I love the song at 8:01.
The problem with rebuilding cams and rockers is that they always get shafted.
I sprung to attention when I read that.
Rocker chat is depressing.
Good cam shaft jokes are all about timing.
@@iceman9678 well they’ve certainly given me a lift!😁
Haha,
Great to be able to mix and match the rockers. Another good video , THANKS
Elin, thanks for another detailed video of the GT6! I am curious about using the old valve springs in a rebuild; do you have to measure/test the old ones for proper height or spring force? Do springs suffer from age, work hardening, or loss of spring force? Also, do you have to inspect/polish the contact face of the rocker arm adjuster screws?
Ideally you should do all that, but I trust that this engine hadn't been abused and the springs are still good. I wish I had the time to do all kinds of checks, balance the pistons and connecting rods, crank flywheel etc... check the connecting rods for twist and straightness.... all this would be great, but there is only one of me... I have to trust my visual inspection on some parts and move on. If I only had one car and all the time (and money) I wanted, I would be happy to build it the way the race cars are prepared :)
@@RustyBeauties As I never let my brother drive this car I can assure you it was never abused. Now, for my MGA that’s another story.
Watched half, but time for dinner. The rest later. Thanks, Elin!
Just finished watching. Great that you had enough usable rockers that you can now assemble the engine. Installing the valves and preparing the head is always exciting. Looking forward to seeing this engine running, Have a good week, Elin!
"I hope you're happy now." 😄
Did you check the rocker bores for wear? I’ve just gone through two four cylinder sets with similar face wear to yours and all had wear to the bores. Can’t find a proper spec except on the Moss site where they’re advertising bronze bushed rockers. That’s 2.8-3.2 thou for steel on iron/steel, matches my measurements of NOS Leyland ones though. Might be worth a check for lateral play you can feel at least before the first start comes around.
Silly question, did you lap the valves?
The machine shop did
Do the springs have an orientation? I think I remember a previous head you rebuilt had springs that needed to be installed in a specific direction (but maybe that's only the ones where there are two springs per valve?). Great video, as always. Stay safe out there.
This particular set had no direction, but you are right, I should have mention that some springs do.
@@RustyBeauties Cool. Looking forward to seeing it burst back into life which, given the cars history, will be extra special.
Some springs on a performance engine have a progressive ratio as the spring compresses. This is to avoid the inertia of the spring continuing its throw and contacting with the piston crown at high revs. This will often show as the coils are closer at the base than at the top, or multiple springs as discussed.
Elin it’s interesting that (on these older engines) there is no valve stem oil seal arrangement. I wonder if that does encourage a small but significant amount of oil to run down the guide for lubrication purposes, but at the same time will coke up the back of the valve more quickly. (Subsequently have you ever tried fitting valve stem o rings on an engine with slightly worn valve guides and did it work?)
@@philtucker1224 I am assuming they didn't fit seals for better valve guide lubrication. Some people install aftermarket ones, but that leads to excessive wear on the guides. I would fit seals only if I install bronze guides, but I don't like these as they have to be rimmed after installation and I can't do that at home :) I hate subcontracting jobs
Nice to whatch its a nice motor am i corect that the motor is a copy of pre war bmw
Hi Elin, I love these videos because you make so many mistakes (that lots of people spot and comment on to correct you). I know you make those mistakes on purpose to feed the UA-cam algorithms ha ha!😂🤣
Don't tell anyone :)
Could you not just reface them gently with a finger sander Elin?