97 Engine noise help
- Thread starter lahar50
- Start date
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when I rebuilt my 91's engine (3fe) the machine shop turned the crank .010 under but assembled the short block with standard size rod bearings. Sounded like a diesel from the first start up. had to do the bottom end all over again 20 miles after reinstalling. Hopefully your's isn't that but it is something to keep in mind.
in a 2f or 3f engine this could be caused by having the valves gap way too open or a lack of proper lubrication at the rocker arms and push rods but i'm not sure about the 1fz since it has OHC.
the lift bracket on the rear of the head right above the exhaust manifold was put on backwards and is hitting the firewall.
In Subarus ther eis the dreaded piston slap, caused by excessive piston to wall clearance. I just noticed that your engine is bored .020 over, is it possible they set the clearances too wide. Also did you use a forged piston vs. a factory replacement? they will make all sorts of noise until warmed up and over idle speed. It could also be from something outside the engine rattling away at idle. Why was the engine rebuilt in the first place, failure or upgrade. that may also have something to point us in the right direction.
did you ever figure it out? what was the problem? They accidentally put a diesel under the hood?
could not get that luckydid you ever figure it out? what was the problem? They accidentally put a diesel under the hood?