Re: 6.0 ls rocker arms clatter
This sounds a lot like a missing or defective oil gallery dog bone...the factory ones are made of plastic and sometimes fail, resulting in oil bypassing the filtering process and upsetting the oil flow throughout the engine.
The dog bone is located in the main oil gallery, drivers side of the engine, accessible under the rear main seal retainer.... See link for a video explaining its role.... https://www.youtube.com/watch?v=V7p0h2VwGP0 |
Re: 6.0 ls rocker arms clatter
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Re: 6.0 ls rocker arms clatter
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Re: 6.0 ls rocker arms clatter
Where did you take the oil pressure reading? Was it down by the filter, or at the top of the engine where the factory had a sensor? I don't recall if the bypass on the pan is before or after the filter, but could you have something wrong with the pressure relief valve that is in the pan on some models and it is allowing the pressure to bleed back into the pan? This might give you a good reading at the bottom of the engine, but a low reading at the top.
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Re: 6.0 ls rocker arms clatter
Make sure oil pressure relief valve is ok....see the video for an explanation...
https://www.youtube.com/watch?v=jNafsqH0vPI :chevy::chevy::chevy: |
Re: 6.0 ls rocker arms clatter
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Re: 6.0 ls rocker arms clatter
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here is some pics of the new ls7 lifter when i first got them i noticed that they will push down real easy not like the old ones that came out of it it will not push down at all and the new delphi ls7 lifters i got from btr will not push down either i also took a pic of the new ls7 lifter and took a old apart
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Re: 6.0 ls rocker arms clatter
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breakdown pic
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Re: 6.0 ls rocker arms clatter
In the smaller inner sleeve there is a metal cap in one end that contains a small metal ball. You can pop the end of the sleeve off with a screwdriver.
I have seen them MISSING the steel balls, hence no oil pressure in the lifter body and no hydraulic lash adjustment capability. To test new lifters, stand them up in a tray of clean oil and push down on the top cap where the pushrod sits. The lifter should fill with oil but then push back against the pushrod as it "pumps up" .... lifter float (the lifters over pumping up) back in the day lost many races! Back in the day I would make hydraulics into solids by machining solid body inserts for the main bodies. :chevy::chevy::chevy::chevy: |
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