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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
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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
VISTA
  • 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
  • 48,522 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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