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Clacking engine noise

Tiny
LADONNA AVERA
  • MEMBER
  • 1996 GMC SIERRA
  • 0.5L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
I had a leak where the transmission fluid goes into the cooling system. I added stop leak the leak stopped but now I have a clacking in my engine.
Sunday, November 4th, 2018 AT 1:22 PM

10 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Stop leak is never a good idea. It causes more issues and solves nothing. It is a band aid that will fall off and make things worse.

What fluid is leaking? Transmission or coolant?

Did you check the oil?

Roy

https://www.2carpros.com/articles/engine-noises
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Monday, November 5th, 2018 AT 4:34 AM
Tiny
LADONNA AVERA
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  • 6 POSTS
Yes, I have good oil pressure and it has not overheated. But a closer look underneath while someone pushed on the gas it is coming from the transmission pan. Yes, I have learned my lesson about stop leak now. Could it have plugged up the transmission filter perhaps would that make a noise?
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Monday, November 5th, 2018 AT 7:26 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, you would need to replace the pan gasket. I will attach a procedure for you.

That will get most of the sealer out of the system.

Roy

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
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Monday, November 5th, 2018 AT 7:42 AM
Tiny
LADONNA AVERA
  • MEMBER
  • 6 POSTS
Thank you very much, but did I mention the leak was up where the fluid goes into the cooling system?
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Monday, November 5th, 2018 AT 9:30 AM
Tiny
LADONNA AVERA
  • MEMBER
  • 6 POSTS
If it matters.
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Monday, November 5th, 2018 AT 9:30 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, but you said you used stop leak and it stopped?

Can you post a picture of what you see?

Roy
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Monday, November 5th, 2018 AT 9:37 AM
Tiny
LADONNA AVERA
  • MEMBER
  • 6 POSTS
I am so sorry I did not have my phone on me. I was out working on the truck, there is that really know where to get a picture it is right up by the radiator underneath the radiator hose where the transmission fluid goes into the cooling system. It is still knocking. I do not know I got to get somebody to look at it and tell me exactly where is coming from now. Thank you very much for answering and I do really appreciate it.
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Monday, November 5th, 2018 AT 4:04 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No problem.

Yes, get someone to look at it. A leak will not cause a knock. That is a separate issue.

Let me know what they say.

Roy
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Monday, November 5th, 2018 AT 4:06 PM
Tiny
LADONNA AVERA
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Okay, thanks.
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Monday, November 5th, 2018 AT 4:19 PM
Tiny
ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
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Monday, November 5th, 2018 AT 4:21 PM

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