Knocking sound comparison. Are my flywheels bolts loose?

[Megatron]

I am pretty certain my flywheel bolts are loose, but I am being told by lots of people that I have a bent rod. Here is my car vs another car.

- My Car

- Another car with loose flywheel bolts.

What do you think? Is it pretty close?

[Sbaileyls1ta]

I don't believe the flywheel bolts knocking would change speed when the rmps go up. Mine were loose and it was a constant knock that didn't change speed. But im not sure... I got a long piece of wood, got under the front of the car, and held it to the bottom of the bell housing and my ear. If you hear it loudy through the wood it may me it.

[zeeman]

Take the inspection cover off and have a look. But unless some work has been done in that area I would doubt the bolts are loose.

[zeeman]

I might be wrong but it could be a busted flywheel. take the bolts out of the torque converter, push it into the trans as far as you can and look at the flex plate.
Like I said, I might be wrong but a bent rod will follow the rpms exactly, a busted flex plate will have some irregularity to it.
It doesnt sound good wharever it is

[hoogiesngrinderz]

Try pulling one plug wire at a time. If the sound goes away or quiets down, you have rod knock.

[Megatron]

Try pulling one plug wire at a time. If the sound goes away or quiets down, you have rod knock.

Does that actually work? Logically the engine parts are still reciprocating so it should still knock. If it works that awesome because it's easy! Running on 5 cylinders won't hurt anything either?

[1BADAIR]

Rod knock. Or something ontop of piston

[hoogiesngrinderz]

Does that actually work? Logically the engine parts are still reciprocating so it should still knock. If it works that awesome because it's easy! Running on 5 cylinders won't hurt anything either?

It is only a test, do not go around with 5 cylinders. The knock happens when the combustion slams the piston/rod down on the journal.

[Gregs_gsxr]

could also be a wrist pin issue

[Megatron]

Thanks guys, more to consider. I'll try the spark plug trick tomorrow.

[zeeman]

whats the oil pressure like?

[Megatron]

Sits right around 45

[hoogiesngrinderz]

Does it raise with RPM?

[Megatron]

I'll check tomorrow, I believe it did.