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2003 Mitsubishi Diamante oil leak

Tiny
FREDDDD
  • MEMBER
  • 2003 MITSUBISHI DIAMANTE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
Oil is leaking from my oil cap---what causes this? Oil cap seems to be fine should I replace this first or?
Thanks
Saturday, December 15th, 2007 AT 3:37 PM

3 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

There should be a seal in the bottom of the cap (rubber "O" ring) it may have dislodged and fallen out, or has crushed past it usable thickness as a seal, or the cap may be cracked, Check for seal, replace seal or replace cap,

Mark (mhpautos)
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Saturday, December 15th, 2007 AT 3:51 PM
Tiny
FREDDDD
  • MEMBER
  • 2 POSTS
Thanks for your prompt reply.
Everything looks fine with the cap but I will replace it. Also seems to be excess pressure. Could the pcv valve need replacing. Some sludge build up may have occurred in past?
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Saturday, December 15th, 2007 AT 4:37 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

if the crank case pressure is a bit high and the PCV is not working as it should than replace it to be safe, high crankcase pressure will cause a failure in other seals as well so best to make sure all is working as it should.

Mark (mhpautos)
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Saturday, December 15th, 2007 AT 5:49 PM

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