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Old 06-02-2017, 03:22 PM
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Join Date: May 2017
Posts: 28
I figured out my engine noise! not the injector!

On my last post I thought I had injector noise coming from the engine. The noise was very loud. Well, I took the oil pan off and found I have a loose piston rod cap. See the attached pictures. I've since then taken the rod cap off, the nuts were so loose they came off by hand.
It appears I got the engine stopped before anything really bad has happened.
The rod appears to be OK, the cap is OK- the crank shaft does not seem to be damaged either. The two halves of the bearing seem to have taken the force. They will need to be replaced.
It appears the bolts were not torqued when the engine was rebuilt.

Just to give you a little background: I bought this engine off a guy who said it was "rebuilt" and never installed in a car. the block was intact with the new pistons and crankshaft and head. I've had to put on the timing chain, injection pump, and I put a not so worn cam shaft on it. and new injectors
My test starts have been with the engine fastened to blocks in my garage.
I don't want to put this into a car until I'm convinced its a good engine.

comments?? thanks!

Attached Thumbnails
I figured out my engine noise! not the injector!-pic-1.jpg   I figured out my engine noise! not the injector!-pic2.jpg  
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Old 06-02-2017, 04:09 PM
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Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,804
Could have been from someone checking the clearance using Plastigage and they forgot to re-torque the nuts.

Uggh, the dreaded blue sealant. Makes me shudder every time I see it.

“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now
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