lifter question/help

BoostedSUV

BoostedSUV

Active member
In my never ending quest to get to the cause of my trucks issues I pulled the intake off to check the lower gaskets. The lower gaskets were perfect but I'm looking into the lifters as a possible cause as well.

How can I verify the proper operation of the lifters? Truck hasn't been started in 2 days but I have 3 lifters that are collapsing when I turn over the motor by hand. I can actually push down on pushrod with my palm and put my finger in between the spring and the rocker... Is it normal for them drain down that fast? I understand hydraulic rollers pump up with oil pressure but I'm trying to figure out if I had a few bad lifters. The rest are rock solid and don't collapse

My problems with this truck started years ago right after I put in a new motor. Within the first 20 miles the rocker studs lifted out of the head and I destroyed a couple pusrods. (Bent them into s-shapes). Is it possible I damaged a few lifters way back then and they're haunting me? Any help would be appreciated. :tup:
 
qbnkiller

qbnkiller

Conflaguration Specialist
Re: lifter question/help

no they shouldnt bleed off that fast. they should get oil in them and stay rock-hard. Now, if you got oil in them from cycling it or starting the motor before you tore it apart, they should be solid.
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Just went and found an old thread of mine from when the rocker studs were lifting out of the head and I was bending pushrods... Cyl 1, 2, and 6. Guess which cylinders have the lifters that collapse? You got it... 1, 2, and 6! Perhaps I'm on to something...
 
B

blackty

Active member
Re: lifter question/help

Wanna take bets if Matt is going to call off of work to fix his truck tomorrow?
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

blackty said:
Wanna take bets if Matt is going to call off of work to fix his truck tomorrow?
Click to expand...

Lol I'm thinking I feel a cold coming on for thursday... (Have to wait for the intake gaskets and lifters to be delivered.) Ehem feel a cough ehem :lol:
 
bezerk

bezerk

New member
Re: lifter question/help

don't get the 875''s. i would just but the stock ones from GM, they hold up fine, and with 875''s they are so loud...that you don't know where to search in your new future. it''s not that we are revving 10k rpm. stock will do.
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Too late I already got the 875's... Reading some prior threads I came to the conclusion that 850's are nothing more than a stock replacement and have had many known failures. I spent the extra $10 and purchased the "better" lifters. I have heard they're louder but I guess I will deal with that as long as they don't trigger false knock....


I should have everything today or tomorrow, but I won't have a chance to get the truck back together until next week. I have to let the lifters soak in oil over night, and I'm racing sunday so no dice on Hot Dog Johnny's :tdown:
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

I'm feeling very confident that this is the cause of my issue that I have been chasing... I can make it all make sense and take it all the way back to when all this mess started. I think I've finally got it squared away. I should know soon enough.. fingers are crossed!
 
vinnieTy

vinnieTy

TY # 1889
Re: lifter question/help

I hope it works out, felt bad I couldn't help that much at renzfest. Keep us posted fingers are crossed.
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

New lifters are in, valves are set. My halogen light burned out so I didn't have enough light to throw the intake back on tonight :rant:


I did call comp cams and they told me the only time I should be able to compress the plunger on a hydraulic lifter is when they're brand new out of the box. Any other time they are no good... I took out 4 that I can compress the plunger. Yet another reason to be optimistic....
 
Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: lifter question/help

DO IT!!!!!

:D

Just been re-reading my thread and the problems I had so I knw how you must feel - tonight's the night right? :D
 
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