FSM valve lash adjustment procedure not best way?

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

E

earl

10 Year 15 Year
Joined
Jul 25, 2006
Threads
60
Messages
297
Location
Canada
So I mentioned that I did a valve lash adjustment on my truck to a friend I work with. He built engines for quite awhile, and was telling me that the way they tell you to adjust valve lash as described in repair manuals isn't 100% accurate, and that it's probably there to save time. He was saying that he adjusts each cylinder at a time or something, so that each rocker arm is at it's topmost position.

Does this make sense? Is it true?
 
earl said:
So I mentioned that I did a valve lash adjustment on my truck to a friend I work with. He built engines for quite awhile, and was telling me that the way they tell you to adjust valve lash as described in repair manuals isn't 100% accurate, and that it's probably there to save time. He was saying that he adjusts each cylinder at a time or something, so that each rocker arm is at it's topmost position.

Does this make sense? Is it true?
Click to expand...

This doesn't really click with me, because you adjust them with the "tension" off them. :meh:
They are either loose, or they are not.

I dunno :confused:
 
At TDC, 4 of the 8 valves will be "loose". Maybe what he means is that he positions the cam so the highest point of the lobe is exactly 180deg away from the rocker? Dunno otherwise. Ask him to elaborate.
 
KLF said:
At TDC, 4 of the 8 valves will be "loose". Maybe what he means is that he positions the cam so the highest point of the lobe is exactly 180deg away from the rocker? Dunno otherwise. Ask him to elaborate.
Click to expand...

Thanks, I think this is what he was saying... suggesting that he thinks they may not all be *completely* loose.
 
raydouble said:
This doesn't really click with me, because you adjust them with the "tension" off them. :meh:
They are either loose, or they are not.

I dunno :confused:
Click to expand...

Ya, this makes sense to me. But I guess my buddy got me wondering if there is varying degrees of looseness? Especially since I was pretty sure that the cam lobes of each 4 loose rockers would be at different positions... but I'm not certain, as I don't have too much experience with engines.
 
I have never been that picky and I have never had issues with the valves not being ajusted right.

The experience I have learned is that I tended to not tighten the adjustment down enough. Snug means very snug.

As well, I changed from doing mine hot and at 8/12 to doing them cold at .7/11. Never an issue for the last 3 adjustments.
 
You must log in or register to reply here.

Share this page

Back
Top Bottom