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Radiator leaks

Tiny
SEAN03
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 4.9L
  • V8
  • FWD
  • AUTOMATIC
  • 136,000 MILES
Hi, I have put in three radiators and all three have gone bad on this car. They last two hundred miles and that is it. I bought two off eBay the one busted and the transmission cooler broke and leaked in my transmission the other just leaked out the seams. I had four of them that leaked out of the seams. After the one that the transmission cooler broke I went to AutoZone and bought a OEM one. This one lasted two hundred miles and is now leaking and my radiator fluid is milky brown and it is thick. How can these keep going bad? Could there be an underlying problem that I am missing? Thanks.
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Sunday, January 5th, 2014 AT 9:47 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It sounds like you have a oil pump pressure relief valve that is stuck causing the oil pressure to go too high which blows out the cooler. I would remove the oil pressure sensor and replace it with a manual gauge to get a true reading.

Please let us know what happens.

Cheers
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Tuesday, June 9th, 2020 AT 12:57 PM
Tiny
HOCNGUYEN
  • MEMBER
  • 2 POSTS
I had this problem with my car and you are right it was the oil pump causing the cooler to blow out. Smart site!
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Tuesday, June 9th, 2020 AT 12:57 PM

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