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Oil in cooling system

Tiny
PAULY6659
  • MEMBER
  • MAZDA MPV
I have a 1994 mazda mpv v6 auto, a/c, 115,000miles, replacecomplete front half timing belt, water pump, gaskets, belts, ect. Engine starts and runs good but found oil in the cooling system but no water in the engine or trans oil. Installed external trans cooler, flush out coolant, oil keeps coming out, trans ok.
Maybe oil passage pluged? Pcv valve?Note when oil filler cap removed engine rpm changes. Need help in hawaii
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Monday, December 25th, 2006 AT 1:02 PM

4 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
If you have found transmission fluid in the antifreeze, you may have a leak in the radiator.
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Monday, December 25th, 2006 AT 4:43 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
With your idle change, I would suspect a plugged pcv system. Not sure about the coolant in the oil other than cracked block or head?
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Monday, December 25th, 2006 AT 7:43 PM
Tiny
PAULY6659
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  • 3 POSTS
I did bypass the trans cooler and the oil keeps coming out with the water at the raidiator filler.
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Monday, December 25th, 2006 AT 11:31 PM
Tiny
PAULY6659
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  • 3 POSTS
Found NO water in engine or trans oil.
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Monday, December 25th, 2006 AT 11:34 PM

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