Coolant in oil

Tiny
VISTA
  • MEMBER
  • 1998 JAGUAR XJR
  • 4.0L
  • V8
  • RWD
  • AUTOMATIC
  • 120,000 MILES
Was running a little rough plus the heater would get cool from time to time and would overheat when I would really get on the accelerator. Coolant would fill the over flow tank and leak out the hose. So I changed the thermostat, drained and replaced the coolant. I replaced the spark plugs, spark plug tube seals and valve cover gaskets. Went to drain the oil and had some coolant come out before I seen oil drain out. I have not ran the engine since I found coolant when draining the oil. Before this over heating problem the car ran great and is in excellent condition. The engine is supercharged. Any help would be awesome. Thanks
Thursday, April 13th, 2017 AT 10:40 PM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Pressure check coolant system with a pressure checker for a blown head gasket. There is also a chemical additive that detect head gasket problem, but it sounds like that is the problem.
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Friday, April 14th, 2017 AT 7:44 AM
Tiny
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  • MEMBER
  • 3 POSTS
Can I just do the pressure check or do I need the additive also?
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Friday, April 14th, 2017 AT 9:38 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You can either one you want if one doesn't show any thing then the other will it can also be a broken cooler line in radiator for transmission or if you have an oil cooler in radiator it could be that as well.
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Saturday, April 15th, 2017 AT 6:16 AM
Tiny
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Ok. Thks
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Tuesday, April 18th, 2017 AT 8:17 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Hello,

Here is a guide that can help.

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

Please let us know what happens.

Best, Ken
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Saturday, April 22nd, 2017 AT 10:36 AM

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