Question on T-4s

[oldyeler]

What was the first year that VW Produced the hydrolic T-4 engine?

[Massive Type IV]

1978.....That year and thoise thereafter were nightmares becaus eof them!

[bugsoup]

Is there a reliable way to add hydraulic lifters to a T4?

[oldyeler]

Yelp I here that every where I ask.

The heat Just kills them.

But if I understand correctly they make decent solid lifter engine builds with a little work???
As I under stand the lifter bores are sleeved to except solids , Are they better or worse that way??

I have another question, Has an one ever seen push rod tubes made out of fluted alumium , with double seals on the ends or is that engineering overkill.:silly:

[kdanie]

If you use type 4 solid lifters you don't need to bush the lifter bores.

Many people dislike hydraulic lifters, others love them. I don't think it's the heat that kills them.

Pushrod tubes with double "O" rings and "flutes".... I assume the flutes are for cooling, probably would not accomplish much. Double "O" rings... might be a good idea.
ken

[Eurolook71]

I would stick with solid lifters. Lot more cam choices, along with less failure. Not to say a hydraulic T4 will always fail, but I've never heard anything good about them. Adjusting valves isnt that hard, I rather enjoy it.

[oldyeler]

I agree on the solid lifters, it proven. and I also think if there is enough bore surface in the tube bores , a double o-ring setup would help a bunch.

Got another brain f-rt?

In early Prat & whitney radial engines I understand they use to coat and cook the jugs and piston with Tung oil to seal the metal pores of the parts to make them slicker and run cooler.

Has anyone ever heard that one before ???????????????
( break out the Formbey's tung oil furniture polish)

[Ron Roberts]

Or you could use some snake oil Both withstand heat about the same I would guess. Guess is the key word here. Don't let that GL Guru by my name fool you!


Ron