Due to arrive soon

Started by 94touring, August 07, 2020, 01:46:39 PM

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MiniDave

Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

94touring

Quote from: MiniDave on January 22, 2023, 10:27:38 AMExcept when it's loaded?

For a front jack?  Just hitched to the bus or a block of wood will suffice.

94touring

#552
Got the brake master on.  Feels good!  Now of course the front lines I ordered were wrong, so I get to bleed the fronts again, but went ahead and bled them now just to see how the pedal feels.  Had to make a few custom lines to the master to make things reach and to tie the 2nd pressure sensor into it.

Also the new oil cooler arrived.  Photos shortly...signal bad at the shop.

94touring


94touring

What I thought would take a couple days is turning into 5!  The rockers on a vw type 1 engine are a lot of work.  First you have to mount them umpteen times to get the shims on the rocker shaft within spec, and slightly offset so the rocker doesn't hit dead center on the valve. Then it's setting up the geometry so at half lift the rocker is in line with the valve.  This reduces valve guide wear.  Simultaneously you're adjusting a variable length push rod to determine what length the rods need to be cut down to. If that's not enough the face of the rockers need trimmed back to screw the tip further in, which allows for less shims on the stands the rockers bolt to.  Eventually you run out of stud or hit the rocker cover otherwise. There was a learning curve involved but should be good to go now. The engine builder didn't do any of this when I checked his geometry to wrap my head around things.  Luckily the internet exist.

MiniDave

#555
Aren't the ends of the rocker studs supposed to be curved? Or rounded?

Edit: I forgot they have those little wobble ends on them.....

The ends you cut off fit into the lifters, right?
Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

94touring

#556
Quote from: MiniDave on January 26, 2023, 07:59:46 PMAren't the ends of the rocker studs supposed to be curved? Or rounded?

Edit: I forgot they have those little wobble ends on them.....

The ends you cut off fit into the lifters, right?

Yep push rods go through the push rod tubes to the lifters.  I went with oversized mouths on the tubes to prevent any chance of the rods rubbing with the ratio rockers.  Some do and some don't depending.  The rocker studs in the picture are as they come. They clear the rocker cover anyways.  Pic of the adjustable push rod tool and of the tubes in place right before I did the final assembly on the 1-2 side.  That block bolted to the cylinder jug is for checking deck height (added half a MM of shims to get the proper deck), but it's bolted up here to compress the cylinder to the block since I had just put sealant on that cylinder base.

Edit to your edit:  yeah wasn't sure what you meant at first.  Those are courier style tips, but I swapped those to some elephant feet tips. 

94touring

#557
Courier vs elephant feet.  The elephant foot covers the valve better and I was able to attain better clearance too.  Good up to 500 lift,  and after getting my dial lined up better determined I am around 475, which matches my cam plus 1.25 ratio rockers.  Showed about 420 with the 1.1 rockers bolted up.

jeff10049

Most of the performance v8's I work on have the incorrect pushrod length, incorrect valve spring installed height, and wrong stud length always built by the best builder of course.
Even a relatively mild-performance small block can have 350 pounds of open valve spring pressure with a roller cam.

What you did is a great setup for your engine.
If your ever this far again consider Pauter roller tip rockers when set up correct like you did valve guide wear would be almost non existent with rollers.
 

94touring

Oh I looked at those, but boy are they expensive! 

cstudep

I thought doing a valve adjustment on my 3.4L Toyota with the bucket/shim style was bad enough, this sounds about 10 times worse. The Toyota isn't super hard or anything but damn if it isn't time consuming as hell.

And like jeff10049 said, I have seen a few "rebuilt" heads for said motor that were completely out of spec for valve clearance. Like so far out of spec that compression went from 90ish in a few cylinders to over 200 after adjusting to the proper shims.

94touring

I feel confident I could do another engine in about half the time now.  The 3-4 side went quickly today.  Need to put the tins back on and then just waiting on the transaxle to arrive.

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