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Chromoly pushrods - effect of incorrect set up?

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729 views 6 replies 3 participants last post by  matt-me 
#1 ·
I'm reading chromo pushrods should be set up to a loose zero or 0.002'', ie not 0.006'' as standard pushrods. What are the effects of having these set up as a standard 0.006''

Since a service/tune-up I'm losing some power when in fourth and am trying to understand if this could be a cause. It was ok before. I forgot to advise i had cromo pushrods so my bad.. Trying to understand more myself before I decide how to approach things.

It's a 1914cc in a T2 EB camper.

Thanks
 
#3 ·
You've lost 0.004" of lift (0.01mm) nothing to worry about or anything you'd feel on the road, however as Carl has mentioned it will be noisier and possibly wear faster.

Has the timing been adjusted as part of the service? That could make it feel a bit flat if set incorrectly.
 
#4 ·
I'm reading chromo pushrods should be set up to a loose zero or 0.002'', ie not 0.006'' as standard pushrods. What are the effects of having these set up as a standard 0.006''

Since a service/tune-up I'm losing some power when in fourth and am trying to understand if this could be a cause. It was ok before. I forgot to advise i had cromo pushrods so my bad.. Trying to understand more myself before I decide how to approach things.

It's a 1914cc in a T2 EB camper.

Thanks
Don't know what an EB camper is, but, as maplesyrup knowledgeably alludes to, the timing could be suspect. 28 degrees is about the maximum advance, all-in, that you should expect, and any kind of 'VW specialist' should not need to be told whether or not an engine has, or has not, any particular type of pushrod. If he (or she) cannot determine this for themselves, dump them and move on... Life is too short and expensive for this type of moron/self-appointed 'expert' to tinker with your valuable engine.

94mm (1915cc with standard 69mm stroke) barrels and pistons are far from ideal for a camper due to their reduced cooling capacity, so correct jetting and timing are doubly important to maximise engine life.

Cheers, Carl.
 
#5 ·
thanks guys for the feedback. EB - earlybay. The timing has been set correctly, if anything it was the timing set previously that he commented on seemed to be wrong but it drove well? I have checked what the timing should be with the builder and it is what it has been set at. I didn't take it back to the builder as i needed some other bits done at the same time which weren't up his street.

The bus drives consistently in all gears up to fourth, so accelerates and pulls. It is when in fourth it doesn't perform the same. It bogs down, especially on hills and even on the flat it takes a while to wind it up beyond 60/65. I'm no racer but before it would easily cruise at 70 at 3500 rpm and pull up hills in fourth. It doesn't do so now, i have to change down and even then rag it.

Something has changed from the service. I could (and probably will) take it back to the builder, we haven't fallen out or anything but i am trying to get a better understanding of what it could be before I do so.

Could it be a fuel issue?

Thanks again Al
 
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