Car overheating and white smoke coming from the rear end

Tiny
DRE409
  • MEMBER
  • 2000 MERCEDES BENZ S500
  • 0.5L
  • V8
  • 137,344 MILES
My car has been overheating. When I start my car white smoke comes from the rear ends at once, I start driving the engine heats up to around 76c after a little less than 5 minutes. Then once I've been driving for about a mile or so it hits 80c and fluctuates from 80 to 90c. Then once I make it to my destination it climbs up a little more. I've replaced the radiator fan, temperature sensor and head gaskets, still no luck.
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Wednesday, July 6th, 2022 AT 7:50 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,544 POSTS
White smoke or steam from the exhaust system says there is coolant being consumed by the engine, when you replaced the head gaskets did you have the cylinder heads pressure tested? If so and they are okay, you have a cracked engine block, and the engine is no good. These guides can help you understand what's going on:

https://www.2carpros.com/articles/white-smoke-or-steam-coming-from-the-exhaust-pipe

and

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil

Please let us know what happens.

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Thursday, July 7th, 2022 AT 12:08 PM
Tiny
DRE409
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  • 2 POSTS
It maybe steam because it's never a lot! My car doesn't leak oil or coolant though so if and I don't have any lights on except my ABS and SRS.
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Thursday, July 7th, 2022 AT 1:25 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,544 POSTS
Okay, the engine overheats, correct? We should do a chemical check the cooling system; it does take much coolant loss to have the engine overheat. Here is a guide to help with the test:

https://www.2carpros.com/articles/head-gasket-blown-test

Please run down this guide and report back.
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Saturday, July 9th, 2022 AT 9:40 AM

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