1991 Jaguar Sovereign 4.0 Water in the Oil

Tiny
HOWLINBOB
  • MEMBER
  • 1991 JAGUAR SOVEREIGN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
I have a 1991 XJ6 with the 4.0. There is water in the oil the car has 95, 000 miles and does not run hot at all. When I began tearing into the engine thinking the problem is a leaking head gasket I notice water in the intake coupling between the throttle body and the mas air flow meter. Could this water have come from the "Part throttle Orifice Control Housing"? This part is located right above the throttle body on the plenum of the intake manifold. His housing has small coolant lines attaching to it. Is there any other way water could be getting into the oil (water pump to timing cover seal) or any other means. Does anyone have any thoughts? It would seem to me if the water was getting into the motor via a leaking head gasket there would not be any water in the intake area especial outside of the throttle body. I would think the leak would have to be really large and would have a tendency to hydro lock the motor first. Hopefully one of you has a suggestion that might save me from having to remove the head. I don’t mind going through the extra work to do that but if I can avoid it would be great.
Thanks
Monday, July 27th, 2009 AT 4:12 PM

1 Reply

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Have a compression test opf the cylinders. An intake leak would not contaminate the oil.A leak at the pump to block could. If you have bad compression on any cylinder suspect headgasket !
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Monday, August 31st, 2009 AT 5:21 AM

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