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Did delete Lh6 (Solved)

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Old Oct 2, 2016 | 01:53 PM
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Default Did delete Lh6 (Solved)

Hey everyone
Looking for some help I am new to this forum. I have a 2006 envoy with a Lh6. I have done a complete rebuild and a did delete. First start up was great. The after a worm up I started to get a lifter tap. Have all new parts in engine. Complete rebuild. Oil pressure at idle worm is about 38 psi. Can't figure out why lifters start tapping. In you need more info let me know thanks for any help.

Last edited by Monkeytools; Oct 16, 2016 at 07:49 AM. Reason: Solved
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Old Oct 3, 2016 | 07:36 AM
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did you tighten rockers when they were at TDC?
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Old Oct 3, 2016 | 08:39 AM
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Yes I did then spun the engine over and rechecked. The thing is on cold start it is fine when it gets to operating temp the lifter seem to lose oil pressure. But the oil pressure is at 38 psi at idle.
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Old Oct 3, 2016 | 08:41 AM
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did you get the valley cover with the o rings to plug the oil ports?
ive read other threads where oil pressure is a mess if you dont
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Old Oct 3, 2016 | 08:44 AM
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Yes I did.
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Old Oct 3, 2016 | 08:49 AM
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I did a complete rebuild and followed this guide to do the delete https://www.google.com/url?sa=t&source=web&rct=j&url=http://lt1swap.com/afm_delete.htm&ved=0ahUKEwjSqsSV477PAhVK4SYKHTUJCR sQFgg7MAc&usg=AFQjCNHwWMW5xaVA12gRUA7UGlaVQGnkCA&s ig2=KEJ_g-Q51Ygpj2nKSRhqJQ
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Old Oct 3, 2016 | 08:50 AM
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is it a stock cam? ive seen mixed reviews that the DOD cam is different then say a non DOD engine? some people reported issues when they did the delete but didnt swap cams...im new to this as well, ill be doing the delete on a 5.3 i just bought so im learning as well
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Old Oct 3, 2016 | 08:54 AM
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Went with a lm7 non dod stock cam.
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Old Oct 3, 2016 | 08:58 AM
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i think the lm7 had different cam specs then the gen 4
try to get a mod to move this thread to the gen 4 internal section and you proli get more replies
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Old Oct 3, 2016 | 09:00 AM
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The only thing that I didnt mess with is the oil pan. All the info I could find said I should be fine not blocking off the lifter relief valve in the pan.
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Old Oct 3, 2016 | 09:02 AM
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OK new to here so couldnt Fing where to post this. Thanks for the help.
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Old Oct 3, 2016 | 09:04 AM
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How to get the moderator to move this thread.
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Old Oct 3, 2016 | 09:15 AM
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PM one of the moderators on the right side of the screen on the main forum page
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Old Oct 15, 2016 | 11:22 PM
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Originally Posted by Monkeytools
The only thing that I didnt mess with is the oil pan. All the info I could find said I should be fine not blocking off the lifter relief valve in the pan.
I believe you are correct, I recently did same to a lh6 in a 2006 9-7x & came to the same conclusion.

I have a slight noise when warm but does not sound like a lifter.

Yours definitely a lifter noise?

Last edited by Jscm3; Oct 15, 2016 at 11:30 PM.
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Old Oct 16, 2016 | 07:53 AM
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Originally Posted by Jscm3
I believe you are correct, I recently did same to a lh6 in a 2006 9-7x & came to the same conclusion.

I have a slight noise when warm but does not sound like a lifter.

Yours definitely a lifter noise?
yes was lifter noise. Had 3 lifters on the right side. Got them to build up finally. Had to back of rockers and turn motor over the tighten them back up.
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Old Feb 17, 2018 | 06:38 PM
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Just wanted to update anyone looking at doing this. The truck runs great no problems. Have put about 30k on the truck. Burns more fuel but doesn’t burn oil. Has lots of power. And my pain in the but suv has turned into a great vehicle. Thanks for this site.
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