Oil blowing out oil cap on valve cover

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12-01-2014 | 12:15 PM

Vikesfan1974

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Newbie

Joined: Feb 2014

Posts: 5

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Model: Cherokee

Oil blowing out oil cap on valve cover

Lately oil has started to blow out my valve cover's oil cap, and the old '90 is running rough. What are possible issues?

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12-01-2014 | 01:45 PM

bigbadon

Senior Member

Joined: Jan 2012

Posts: 952

Likes: 3

Year: 2004

Model: Grand Cherokee

Engine: 2000 4.0

Check crankcase ventilation first

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12-01-2014 | 01:47 PM

Firestorm500

CF Veteran

Joined: Apr 2009

Posts: 4,734

Likes: 11

Year: 2015, 2012

Model: Grand Cherokee (WK2)

Engine: 3.6L

Then start trying to figure out which and how many valves are burnt.

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12-02-2014 | 06:03 AM

freegdr

CF Veteran

Joined: Mar 2010

Posts: 47,923

Likes: 31

From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Check ccv tube is clear and make sure vacuums present first .

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