Oil Leak..Oil Pressure Switch Failure? - Defender Source
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Old December 19th, 2010, 01:39 PM
tebby's Avatar
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Justin Tebbenkamp
95 D-90 ST
Join Date: May 2008
Location: Blacksburg, VA, USA
Posts: 262
Oil Leak..Oil Pressure Switch Failure?

I've had what seems like a massive oil leak the past couple of weaks. At 103k miles I was informed it may be a front or rear main seal. After cleaning it up and changing the oil it appears the plastic tip on the oil pressure switch is cracked (large chunk missing)...and oil is being pushed out the top of the switch. Is this a common failure? Could no exhaust cause this to happen?

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Old December 19th, 2010, 02:05 PM
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John Karlsson
1966 Series IIA 88 SW
Join Date: Jan 2004
Location: Hope Valley, RI USA
Posts: 323
It wasn't massive in my case, but I did have to replace a leaky pressure switch a while back.

John Karlsson
Hope Valley, RI
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Old December 19th, 2010, 03:16 PM
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Birmabright Bread Box/Swagger Wagon
Join Date: Dec 2005
Location: Under the bonnet
Posts: 1,668
Thumbs up

If the switch needs replacing, this would be a good time to replace it with a real oil pressure gauge.

Here is my project:

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