3.0l Engine Rebuild
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3.0 Rebuild | Diagnosis | Teardown | Shroud | Prep

Disassembly Begins


Only one broken stud, but on #4 exhaust

Disassembly began by removing the drivetrain from the body of the car. This allowed a good look at the leaky area and it was pretty ugly, but no holes in the case.

After getting the engine on the stand the exhaust was removed and then the valve covers were removed. First the drivers side and the leaky area was inspected. Not much to tell from that and no head studs broken.

The the passenger side was a different story. The lower valve cover came off complete with one exhaust side head stud. The broken stud was from #4 and made of Dilavar. Broken exhaust side head studs are a very common issue for the 3.0l engine. Porsche used Steel on the intake side and Dilavar on the exhaust side. All others were intact.

Carnage Revealed!


And the pieces came tumbling down...

Still some pieces left in the case

All the pieces collected in one pan

After the valve covers were removed, the sump plate was taken off and serious dismay was realized. Several bits and pieces fell out as the plate was removed and many more were caught in the sump screen. All bits and parts were from piston rings and ring landings.

The parts were collected into a single pan as best possible. For the most part, the bottom and middle rings were completely destroyed. Later, while diassembling the #3 cylinder, the majority of the top ring was found to be still on the piston, but in multiple parts. Pelican Parts Thread

RTV Hell


Early evidence of a very poor top end job

As shown in the picture to the right, RTV can bee seen squeezing out between the cam carrier and the head. RTV is a very unpleasant substance when used in the wrong application, such as this one. During a previous valve adjustment, much of the RTV had been cleaned off of the valves and valve cover sealing surfaces.


Tear Down Part: 1 2 3 4 5 6

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