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Crankshaft seal replacement

Tiny
CARLOS MELO
  • MEMBER
  • 1961 CHEVROLET CLASSIC
  • V8
  • MANUAL
  • 86,000 MILES
Had the front crankshaft seal replaced by a mechanic. Because I was away when the job was done, the mechanic dropped the car off at my garage. When I first started the car, it seemed to run rough and had a different sound. I immediately went back to the shop and the mechanic agreed that it shouldn't be driven. Several days later the mechanic told me that the car was all set, I arrived at the shop, started the car and it was still running rough. I again left the vehicle at the shop and several days later he showed me a damaged crankshaft. Could a crankshaft go bad as a result of a bad seal replacement? Car ran great prior to the seal replacement.
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Wednesday, October 30th, 2019 AT 4:17 AM

21 Replies

Tiny
ASEMASTER6371
  • MECHANIC
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Good morning,

The simple answer is no.

What did he say is the reason for running rough? What did he mean damaged crankshaft?

It does not make sense.

Roy
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Wednesday, October 30th, 2019 AT 4:41 AM
Tiny
CARLOS MELO
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  • 11 POSTS
He showed me a photo of the crankshaft scored/scraped and now there is metal particles in the oil pan.
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Wednesday, October 30th, 2019 AT 5:10 AM
Tiny
ASEMASTER6371
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Can you upload the picture for me to see?

Roy
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Wednesday, October 30th, 2019 AT 9:30 AM
Tiny
CARLOS MELO
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  • 11 POSTS
See 4 photos attached.
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Wednesday, October 30th, 2019 AT 10:42 AM
Tiny
ASEMASTER6371
  • MECHANIC
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There is only one picture.

That bearing is junk and most likely the crank is damaged.

I would love to know why this happened.

Is that the only bearing that is damaged?

Roy
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Wednesday, October 30th, 2019 AT 12:37 PM
Tiny
CARLOS MELO
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Other bearings are damaged, see other photos. I also would like to know why it happen.
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Wednesday, October 30th, 2019 AT 12:51 PM
Tiny
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There are no other photos. Only one came through.

Roy
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Wednesday, October 30th, 2019 AT 12:53 PM
Tiny
CARLOS MELO
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  • 11 POSTS
Did you see the other photos?
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Wednesday, October 30th, 2019 AT 1:07 PM
Tiny
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Wow. The crank is wiped out.

Was there any issue prior to this failure?

Roy
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Wednesday, October 30th, 2019 AT 1:12 PM
Tiny
CARLOS MELO
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  • 11 POSTS
The car ran great prior to this failure. Now the mechanic is thinking that the oil pump was the factor?
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Wednesday, October 30th, 2019 AT 1:16 PM
Tiny
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No, not at all. You are at the point of removing the engine for a complete overhaul.

I am worried something went bad during the seal replacement that caused bearing damage.

It is a simple job but I am wondering if something went wrong.

Is that a picture of the car?

Roy
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Wednesday, October 30th, 2019 AT 1:20 PM
Tiny
CARLOS MELO
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  • 11 POSTS
That's I am thinking that something went wrong with the installation. Yes, that is the car.
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Wednesday, October 30th, 2019 AT 1:26 PM
Tiny
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Okay, it said 1961 on the post information. That is 1963-1967 body.

You need another opinion on this. Is the car at the shop or at your house?

Roy
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Wednesday, October 30th, 2019 AT 1:34 PM
Tiny
CARLOS MELO
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It's a 1966 and the car is at the shop.
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Wednesday, October 30th, 2019 AT 1:36 PM
Tiny
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My gut thought is that the engine was run with no oil after the repair.

Roy
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Wednesday, October 30th, 2019 AT 2:02 PM
Tiny
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How do I prove that?
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Wednesday, October 30th, 2019 AT 2:05 PM
Tiny
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You cannot unless someone there tells you. I doubt they will own up to it.

You are in a rock and hard place.

Roy
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Wednesday, October 30th, 2019 AT 2:15 PM
Tiny
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Indeed I am. Running without oil is the only thing that makes sense.
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Wednesday, October 30th, 2019 AT 2:19 PM
Tiny
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Yes, it does.

Roy
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Wednesday, October 30th, 2019 AT 2:48 PM
Tiny
CARLOS MELO
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  • 11 POSTS
Thanks very much for thoughts.
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Wednesday, October 30th, 2019 AT 3:00 PM

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