Any GM Techs out there?I need some info.

[Sheepcrazyguy]

Any GM Technicians on here?I need some information about my 2002 6.0L

[The Rog Man]

This place has a wealth of knowledge about gm trucks.

http://www.gm-trucks.com/forums/

what is yer question ???
I have a 06 6.0 litre

[rugatika]

Post your question. Someone on here may be able to help you out.

[Sheepcrazyguy]

Are the lifters adjustable in the 6.0L?Has there been any history of timing chain noise in these engines?

[The Rog Man]

Well i don't know the answer too yer question but i do know the forum link i posted will have your answer.

[Sheepcrazyguy]

OK Thanks!

[Cooeylover]

Like a knock.

http://www.pistonslap.com/

[rugatika]

I had a bearing pile up in my cam at around 280,000kms IIRC and it was making a ticking noise like you describe. Not very loud but you could hear it. I had them (independent engine rebuilders) rebuild the engine for around $5500.

I think they cured the piston slap issue in the first couple years of manufacture.

[Sheepcrazyguy]

I know all about the piston slap issue,this isn't that problem

[Cooeylover]

Ok, just wasent sure on how many people were familiar with the "slap". I bought a used 97 chevy a couple years ago and when i changed the oil, the slap started. yeah i got hosed a bit, im thinking the guy i bought it from had an additive in it that worked. Ive tried everything to quiet this thing down but it dont seem to sork, even lucas makes no difference.
sorry, didnt mean to highjack your thread, but ive never heard of any major mechanical issues with the 6.0.
Good luck with your noise, hope it aint an expensive fix.

[Sheepcrazyguy]

Not a problem,thanks for the help.I'm a licensed mechanic but have managed to get away from it somewhat.Whatever it is sounds like money to me!Think I'll keep driving it and see what happens.

[keeks]

I'm kinda green to the engine building stuff, but for the life of me I can't imagine how you would adjust the lifters. The lifters are deep inside the engine and ride against the cam. Are you referring to adjusting the rocker arm and valve lash perhaps? If they are equipped with polylocks you can for sure. If they are a solid arm with a ball and nut, then they are not adjustable.

I did some reaserch, and your engine has a roller cam, roller lifters and roller rockers. They sould easily be adjustable. Check out this link as a guide.

http://www.centuryperformance.com/ad...h-spg-149.html

k

[Sheepcrazyguy]

Originally Posted by keeks

I'm kinda green to the engine building stuff, but for the life of me I can't imagine how you would adjust the lifters. The lifters are deep inside the engine and ride against the cam. Are you referring to adjusting the rocker arm and valve lash perhaps? If they are equipped with polylocks you can for sure. If they are a solid arm with a ball and nut, then they are not adjustable.

I did some reaserch, and your engine has a roller cam, roller lifters and roller rockers. They sould easily be adjustable. Check out this link as a guide.

http://www.centuryperformance.com/ad...h-spg-149.html

k

Thanks for the info,if you read what you sent me your questions would be answered.Adjusting valve lash is what you do with mechanical lifters,when you need clearance between the valve stem and rocker arm.Read the full page and it will tell you how to adjust hydraulic valve lifters,although I believe they are off on the specs.
Let me rephrase my original question.Are the hydraulic lifters adjustable in a GM 6.0L engine?

[keeks]

Ah, I read that part now on the hydraulic lifter adjustment. Thanks for that. And btw, the above mentioned article still has you adjusting rocker arms, not lifters. I just don't see how you adjust a lifter?? I adjust the "valve lash" at .030" on my engine, that has a full roller setup with hydraulic roller lifters.

Thanks
k

[moosemad]

Not sure in the 6 ltr but you may have a collapsed lifter.

[keeks]

Actually if you are talking about adjusting the preload in a new lifter install, well, that's a different story I guess.

k

[sparky660]

I'm not 100% sure but I believe they are what they call net lash. You do not adjust them like the old chevy V-8's. These ones use a different method where you torque down the rocker stud and that's it. They are not adjustable to my knowledge.

[Sheepcrazyguy]

Originally Posted by sparky660

I'm not 100% sure but I believe they are what they call net lash. You do not adjust them like the old chevy V-8's. These ones use a different method where you torque down the rocker stud and that's it. They are not adjustable to my knowledge.

This is what I'm wondering,call me lazy,I don't feel like pulling off the valve covers to have a look.Thanks for the information.

[Sheepcrazyguy]

Originally Posted by keeks

Ah, I read that part now on the hydraulic lifter adjustment. Thanks for that. And btw, the above mentioned article still has you adjusting rocker arms, not lifters. I just don't see how you adjust a lifter?? I adjust the "valve lash" at .030" on my engine, that has a full roller setup with hydraulic roller lifters.

Thanks
k

Maybe have another look at what you sent me.The title of the first paragraph is "Introduction to Adjusting Solid and Hydraulic Lifters:".It's mentioned as a title on 2 or 3 more paragraphs.
If your adjusting the "valve lash"on your engine to .030 that means your using a feeler gauge between the rocker arm and valve stem.It would also indicate your engine has mechanical lifters.Further more I've never see,and I could be wrong here,an engine that you adjust the "valve lash"to the same specs on the intake and exhaust valves.
When adjusting hydraulic valve lifters you loosen your rocker arm off until you have clearance in you valve train.Then tighten it up until you have "zero" lash.Then tighten it down the required amount from the manufacturers specs.Thereby centering the plunger in the lifter body.Just because your moving the rocker arm doesn't mean your not "adjusting the lifter"
No it's not preload on the lifter either.Your centering the plunger in the lifter body.There is no preload like on a tapered roller bearing.

[russ]

Originally Posted by Sheepcrazyguy

Are the lifters adjustable in the 6.0L?Has there been any history of timing chain noise in these engines?

Make sure you have a check valved oil filter that prevents flow back. CT, Napa & BtoB seem to have a habit of selling the wrong ones.

[Sheepcrazyguy]

Originally Posted by russ

Make sure you have a check valved oil filter that prevents flow back. CT, Napa & BtoB seem to have a habit of selling the wrong ones.

Is there a particular make you recomend?AC Delco?Or is it better to right to GM and skip the aftermarket?Thanks

[russ]

After cutting a few aftermarket filters apart you loose your enthusiasm for saving a few dollars. In Canada, the AC Delco filter is the replacement filter. Assuming you have a 2500 4x4, you'll need a PF44C

[keeks]

We adjust the lash the same on intake and exhaust because we are using a 1.5 rocker on intake and a 1.6 rocker on exhaust. And that is what my engine builder told me to do. And this is a race engine, that gets freshened every 30 nights or so. So I'm sure it gets treated differently than an engine meant for longevity, mileage, and emissions.

Quote: "Maybe have another look at what you sent me.The title of the first paragraph is "Introduction to Adjusting Solid and Hydraulic Lifters:".It's mentioned as a title on 2 or 3 more paragraphs.If your adjusting the "valve lash"on your engine to .030 that means your using a feeler gauge between the rocker arm and valve stem.It would also indicate your engine has mechanical lifters."

Thanks much for the condescending tone. That is very helpful. If you knew all this then why did you ask your question in the first place?? I'm still learing, and thought I was helping. But I guess you retired mechanics know best, and anyone else is an idiot since we obviously don't read what we post.

And, just so you know, my engine has hydraulic roller lifters, not mechanical lifters. But I am probably wrong on that as well.

I apologize if the info I gave was unhelpful, and I apologize if my tone was taken the wrong way, as that is not how I intended it. Like I said, still trying to learn.

k

[russ]

sheepcrazy, you're not adjusting the lifter you are adjusting the rocker arm as stated by keeks. The lifters are indeed hydraulic rollers that have NO adjustment.

Do a top end engine cleens to get the carbon out and carry on with life. I haven't seen an engine come apart at our shop for a valve lash adjustment in YEARS. Albeit, we're a small shop; but just the same, all we play with around here are trucks, so it just doesn't happen that often.

What's next, someone telling us that valve lash needs to adjusted with the engine running and puking oil all over the place? Now that's OLD school and totally unnecessary.

[Sheepcrazyguy]

Originally Posted by russ

sheepcrazy, you're not adjusting the lifter you are adjusting the rocker arm as stated by keeks. The lifters are indeed hydraulic rollers that have NO adjustment.

Do a top end engine cleens to get the carbon out and carry on with life. I haven't seen an engine come apart at our shop for a valve lash adjustment in YEARS. Albeit, we're a small shop; but just the same, all we play with around here are trucks, so it just doesn't happen that often.

What's next, someone telling us that valve lash needs to adjusted with the engine running and puking oil all over the place? Now that's OLD school and totally unnecessary.

If that's the case why does the article he sent me say "adjusting hydraulic lifters?I didn't come on here to play games I only wanted some answers to my questions.Maybe if people only answered the questions asked instead of playing games this sort of thing wouldn't happen.We can continue to play games all day.It says what it says.I didn't send it.He did,I'm only saying what it says.

[Sheepcrazyguy]

Close this thread

[russ]

I don't need to read his article.

It sounds as though you were looking for opinions to re-affirm your diagnosis. I'll not bother trying to help any more.

[keeks]

Post deleted, I'm with russ.
k