'99 Tahoe 5.7 lifter adjustment...

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  #1  
Old 05-09-11, 04:12 AM
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'99 Tahoe 5.7 lifter adjustment...

Help, please! A friend of mine, as a favor to a friend of his, took on the task of replacing the head gaskets on his friend's Tahoe. Way above his skill or experience level, and without a manual. Now it's time to adjust the lifters, and, guess what - he's uncertain as to how! Hydraulic lifters, I'm pretty sure - is the procedure to tighten the rocker nuts until the pushrod doesn't turn by finger-rolling any more, then 1/2-turn more? Or some other procedure? I promised him I would help him today if the weather holds, so I guess I need to show up with correct information! Any help would be greatly appreciated. Thanks in advance - Chris
 
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Old 05-09-11, 05:55 AM
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Sometimes I have the rocker covers off. Have the rockers somewhat snug then start the engine. As it is running I tighten it down till it that rocker just stops clicking.
 
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Old 05-09-11, 07:43 AM
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cmil you got it right. The lifters have to be preloaded some in order for them to do their job.
 
  #4  
Old 05-09-11, 07:29 PM
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well, buddy, i have 99 repair manual here in front of me. including your tahoe. lifters are supposed to be in lifter retainers. lifter retainers have bolts that have to be torques to specific level. lifters have to be reinstalled in the same locations and order they were originally installed. that's it. but what you are looking at is a very specific reinstall procedure for rockers. THAT is a lot of engine turning and re-torquing.



 
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Old 05-09-11, 07:32 PM
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let me know if you can read it. site is resizing pics, they end up crappy. i can email them to you.
 
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Old 05-10-11, 06:05 AM
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Thanks, guys. Ukrbyk, that looks an awful lot like a Chilton's manual the pics are from. The bold print showed up great, but the fine print - either my eyes or my computer (or both) are crappy! If you can and have time, my email is [email protected]. BTW, I think the lifters stayed in the engine while the heads were off. I love my friend, but he's not so much a "do any more than is absolutely required" kind of a guy! It's just pushrods and rockers and buttoning everything up now. Thanks again - Chris
 
  #7  
Old 05-10-11, 08:02 AM
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yes, indeed. it is chilton. here's a very friendly suggestion for you:
KISS. go to library, spend 50 cents on copies from repair manual. or, buy chilton, it's only $15 or so. it's not that i mind sending you pages - and i took 300dpi res ones, it's resizing in the site that did this to them - but it is simply feasible to have manual on hand.
basically, you do not adjust lifters. you adjust rockers. now, for that, you have to set engine at TDC, set torque on #1, spin engine, set #2 and so on. a lot of spinning and torquing.

also, friendly again - pm email addresses, don't post them in the thread. unless it's a junk mailbox anyway.

let's try this for a change:

http://i302.photobucket.com/albums/n...ers_Page_2.jpg

<a href="http://s302.photobucket.com/albums/nn101/ukrkoz/?action=view&amp;current=IMG_04531.jpg" target="_blank"><img src="http://i302.photobucket.com/albums/nn101/ukrkoz/IMG_04531.jpg" border="0" alt="Photobucket"></a>

those should give you full blown pics.

http://i302.photobucket.com/albums/n...ers_Page_1.jpg

<a href="http://s302.photobucket.com/albums/nn101/ukrkoz/?action=view&amp;current=lifters_Page_1.jpg" target="_blank"><img src="http://i302.photobucket.com/albums/nn101/ukrkoz/lifters_Page_1.jpg" border="0" alt="Photobucket"></a>

you know what, if he removed engine heads without removing rockers and camshafts, then it does not look like you need to do anything. you have to remove camshafts to get to lifters.
 
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