lifter question/help

Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: lifter question/help

Call her and tell her you're sick!!! Do it!!!!!!

Man you must be frustrated waiting to do that work!

:D
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

I finished putting the truck back together last night and its ready to start... It got late so I didn't want to start it up and let it run.

Tonight should be the moment of truth.. I'm going to start it, set the timing, let it run for about 20 mins and then pull the valve covers off and re-check the valve lash. I really hope this was my problem because I don't know how much more aggravation I can take!!
 
vinnieTy

vinnieTy

TY # 1889
Re: lifter question/help

Well Anything!!!!!!!!!!! My fingers are killing me, HAHAH they are stil crossed!!!!!!!! HAHA Let us know! :tup:
 
NJ93TY

NJ93TY

Donating Member
Re: lifter question/help

Its back together, he said it wouldn't start last night so he gave up, He has to check timing. If all goes well he will be posting later and in a very good mood.
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Well that was a big waste of time and more money :tdown:

Truck still idles like funny, randomly picks up and drops RPMs, Vac is only 14lbs at idle and drops to 10 when the idle picks up. When it does the WBO2 shows lean and the truck still breaks up at the same RPM spots. Same story as when I started... Time to pull the plug. Anyone need need a motor? It has fresh lifters!
 
qbnkiller

qbnkiller

Conflaguration Specialist
Re: lifter question/help

With that cam, you should have plenty more vacuum than that! Are you sure there isn't anything funny with cam timing?
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

412 cam, nothing special. It was idling at 18lbs of vaccuum until last week. I pulled the intake because I thought maybe it sucked an intake gasket... The truck just feels flat like it's down on power.
 
Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: lifter question/help

That sucks giant mountain goat balls.

I was supposed to head up your way to collect my truck but the :rant:ing shipping company are delaying me another week or two so sadly I have no truck but I can gret a train and come see.

I doubt I'll be much use but it would be good to meet and see a new part of the US if you're amenable? I need to get intouch with Smaug aka BigSMoosh as well...
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Mark let me know if you want to come up one weekend... I'm 10 mins from one train rail and 25 from another so there are options! :lol:


When you get in touch with Erik/smaug/big smoosh and figure something out let me know. There are a few of us around this area, we'll meet up! :tup:
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: lifter question/help

BoostedSUV said:
Well that was a big waste of time and more money :tdown:

Truck still idles like funny, randomly picks up and drops RPMs, Vac is only 14lbs at idle and drops to 10 when the idle picks up. When it does the WBO2 shows lean and the truck still breaks up at the same RPM spots. Same story as when I started... Time to pull the plug. Anyone need need a motor? It has fresh lifters!
Click to expand...

Tat doesn't sound right at all, especially if you had 18" before. You need to resolve that issue. BTW how did you adjust the valve lash on those lifters?
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Sy#2661 said:
Tat doesn't sound right at all, especially if you had 18" before. You need to resolve that issue. BTW how did you adjust the valve lash on those lifters?
Click to expand...

Just for clarification I lost some engine vac prior to pulling off the intake and changing lifters. That's the reason I took it apart.

As far as adjustment is concerned I set them as per the comp instructions and the way I have always set hydraulic lifters. Zero lash plus 1/8 turn. I set the intake when the exhaust start to move and set the exhaust when the intake is at it fully open point. I let it run for a half hour last night so I'm going to pull the valve covers and re-check everything.
 
qbnkiller

qbnkiller

Conflaguration Specialist
Re: lifter question/help

Have you done a leakdown test yet? How about bringing the cylinders up to TDC where both valves are completely shut (one by one) and air up the cylinder with your air compressor (with like 40#). Do you hear the air escaping? Do you have a valve problem?
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

qbnkiller said:
Have you done a leakdown test yet? How about bringing the cylinders up to TDC where both valves are completely shut (one by one) and air up the cylinder with your air compressor (with like 40#). Do you hear the air escaping? Do you have a valve problem?
Click to expand...

I did a leak down test a few months ago and had a few cyl leaking slightly passed the rings (I could hear it in the dipstick) but nothing major as far as leak percentages. I do have to pull the plugs out again so I'm going to leakdown test the motor again as well as re-check valve lash. I hate to say it but if I find a bad cylinder I'm not fixing the motor for the 5th time.
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: lifter question/help

BoostedSUV said:
As far as adjustment is concerned I set them as per the comp instructions and the way I have always set hydraulic lifters. Zero lash plus 1/8 turn. I set the intake when the exhaust start to move and set the exhaust when the intake is at it fully open point. I let it run for a half hour last night so I'm going to pull the valve covers and re-check everything.
Click to expand...

From what I read from Comp Cams, you're suppose to set those rockers with a dial indicator.

http://www.syty.net/forums/showthread.php?t=53610&highlight=875

1/8 turn is probably still too much. In general 1/4 to 1/2 turn is about .030 to 0.050 preload that most hydraulic lifters require.

Anyways I don't think this has anything to do with your problem.
 
BoostedSUV

BoostedSUV

Active member
Re: lifter question/help

Sy#2661 said:
From what I read from Comp Cams, you're suppose to set those rockers with a dial indicator.

http://www.syty.net/forums/showthread.php?t=53610&highlight=875

1/8 turn is probably still too much. In general 1/4 to 1/2 turn is about .030 to 0.050 preload that most hydraulic lifters require.

Anyways I don't think this has anything to do with your problem.
Click to expand...

I agree that has nothing to do with my problem and I will recheck them now that the motor has been run and the lifters are pumped up. Right from the instruction sheet that came with the lifters it said move the pushrod up and down and tighten the nut until there is no more vertical movement in the push rod and turn the nut another 1/8 turn. I've also done them by twisting the push rod and tightening the nut until you feel resistance against the push rod and then going the 1/8 turn. 1/8 turn is looser than I nromally set the preload... I always used a 1/4 turn as a rule of thumb. I have poly-locks so setting lash is real easy... I trun down the nut by hand until I feel it hit zero lash, I then tighten the allen jamb screw down by hand, put a wrench on the nut and crank it an 1/8 turn to lock everything tight and into place.
 
bezerk

bezerk

New member
Re: lifter question/help

this is just a thought here, but can it be that the cam bearings are not installed correclty? causing your lifters getting not enough oil? do the lifters push out oil when you run the engine? shoudl take 30-40 sec for them to squirt oil
 
You must log in or register to reply here.
Top