If all cylinders are around the same psi, that's a great first step. I'm also thinking that for static compression that a measurement of 120 psi would equate to around 8:1 compression. Didn't those 3.8 turbo engines run around 8:1 compression?
Now I understand why they pull the turbos
- Thread starter Mr T Type
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If all cylinders are around the same psi, that's a great first step. I'm also thinking that for static compression that a measurement of 120 psi would equate to around 8:1 compression. Didn't those 3.8 turbo engines run around 8:1 compression?
That makes sense that it would be low static compression to leave room for the boost.
Pulled the top of the engine apart today so I could get to the Valve covers... soon as I pulled the covers it was obvious that every thing was brand new! When I roll over the engine all the rockers are moving like they should, and I looked with a magnet around the head bolts cause they hold a little puddle of oil and no metal. Next I will cut the filter open and check for metal there. Crazy as it sounds I think that mechanically this engine is sound. Any other checks you guys recommend before she goes back together? Also I did verify my waste gate is normally closed and the turbo spins nice also a rebuild tag from Alamo.
Pulled the intake today, all lifters are traveling about 1/8 of an inch above the casting. Also cam lobes that I can see look and feel new. Since I'm here I will replace the lifters and push rod and go back together with the engine. Another dead end........
If I was you I would leave the lifters in there place, unless you see signs that show wear. On a flat tappet lifter, the lifter wears to the cam lobe it rides on. You don't take out lifters and move them around for that reason and it is almost unheard of to reuse a flat tappet cam a second time for that reason
Pulled the intake today, all lifters are traveling about 1/8 of an inch above the casting. Also cam lobes that I can see look and feel new. Since I'm here I will replace the lifters and push rod and go back together with the engine. Another dead end........
no I didn't,
Do these engines have a just able rocker arms? You should have checked the valve lash right after pulling the valve covers to make sure you don't have a valve hanging open or too tight of a valve lash setting. I have been thinking about your problem lately I think you may have a valve not closing all the way.
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