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Anybody recognize this sound?

Featured Replies

My daughters 97 Legacy LSI 2.5 DOHC auto 220000+ mi

Started making this loud sound today, it gets a little quieter when it's in gear.

The end of the vid is in gear R then N then D.

th_IMG_0132.jpg

Rod knock. It's toast.

 

Pull the pan. You'll find the metal.

 

GD

 

Yup, the engine is toast. Sounds like a main bearing has broken off. The end of an engine.

Impressive that it runs.

 

Only ever heard 2 that bad.

 

It'll be good for other newbies that come here and search.

 

But it sucks for you.

 

When I get one like this I put a 2.2 in it. Most JY 2.5's are gonna have hG issues which often lead to the rod bearing issue.

rod knock toasty i have a good crank if you need with rods for 96-98 ej25d or have two rebiuldable short blocks and one running long block with bad headgasket

Yes. A 95 automatic 2.2 is a direct swap - no wiring required at all. 96 to 98 will require a different exhaust header. Otherwise its plug and play.

 

GD

i have very good results putting 2.5 heads on 2.2 engine close to same power and you just need a 2.2 short block

  • Author

Daughter never liked the car.It looks like a real easy swap but we don't have the

money for another engine.

  • Author

Are you guys a 100% on the engine. I moved it today, it doesn't seem to want to go forward to well. Would the transmission make such a noise?

This is two or three noises, and I dont think it is a rod knock.

 

Rod knock has a very easy test. Disconnect 1 plug wire at a time. When you get to the affected cylinder the noise will stop.

 

If that isn't it, and as you say the car doesnt want to move, lets look at a transmission issue, like a failed torque converter or flex plate, broken front pump, god knows what else.

 

Rod knock

 

Are you guys a 100% on the engine. I moved it today, it doesn't seem to want to go forward to well. Would the transmission make such a noise?

 

Yeah, it's not gonna want to drive well with spun/seized bearings. It's excactly the spun bearing noise....heard it many times.

 

You will find the metal.

IM going with a flex plate, but like i said the rod bearing noise is an easy test to do.

 

Also there is the usual disclaimer, that noises are hard to diagnose over the net, so GD may be correct. I may be correct, or we may both be correct.

  • Author

Would the flex plate be an easy fix??

It sounds like it's banging on the case, can't tell if it's the bell housing or not.

Edited by Pacific Rider

Problem with the flexplate theory. If it were damaged badly enough to affect engagement of the transmission, the engine would not be able to start because the starter could not spin the crankshaft fast enough to overcome the compression in the cylinders.

But the flexplate can be inspected through the access hole in the top of the bell housing to the right of the throttle body. You could even remove the bolts that hold it to the torque converter and see if it falls apart.

The picture of the cracked flexplate was on a running car, so they can run and start.

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