Bubbling around spark plug
09-02-2012, 04:53 PM
#1
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Bubbling around spark plug
1990 renix 4.0 xj is bubbling around #3 spark plug. I just watched it do it for about atleast 15 min with engine running. Here are pics
09-02-2012, 05:01 PM
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Yes all snug tight I just replaced the plugs about 1 month ago. Uses a very little amount of antiseize on the threads when Re installed.
09-02-2012, 05:06 PM
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
I don't remember if the plugs have a washer or not but if they do did you replace it or did the old on stay in the hole. Also it can be as simple as dirt or crud isn't letting it seat correctly.
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09-02-2012, 08:34 PM
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Originally Posted by DFlintstone
Something run down in there and boil? Does it do it when it's not good and hot?
09-02-2012, 10:08 PM
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Year: 90,84
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Engine: 4.0,2.5
Boy, you got a good one there! Certainly wouldn't expect anything to be coming up past a tightly sealed plug. See what you can wipe with a paper towel and have a look? Put a little soapy water and see if it bubbles? Stick a little piece of rag or something above the washer, and below the edge of the cover and make sure it's coming from below, and not running down? Swap the plug with another? Got me! Does it do it when it's not good and hot?
09-02-2012, 10:15 PM
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Originally Posted by DFlintstone
Boy, you got a good one there! Certainly wouldn't expect anything to be coming up past a tightly sealed plug. See what you can wipe with a paper towel and have a look? Put a little soapy water and see if it bubbles? Stick a little piece of rag or something above the washer, and below the edge of the cover and make sure it's coming from below, and not running down? Swap the plug with another? Got me! Does it do it when it's not good and hot?
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