Spak plug fouling question(with pics)
#1
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Changed my plugs yesterday and noticed that 2 of them have white fouling with some white specks on them as well. There were also 2 of them that weren't as bad but had some specks on them. The others looked normal. Is this coolant fouling like I suspect it is? I have been loosing coolant but my t-stat housing was leaking, which is now fixed. I have that ire inkling that my heads my have cracked.
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#3
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#6
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If it is ash it could be oil but from what i can see it looks normal. If you really want to be sure get yourself a compression tester and check all of the cylinders compression paying close attention to the two cylinders that the plugs came from. I wouldn't be too concerned with a blown head or head gasket though.
#7
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#8
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looks like over heating.. did you let your reservoir tank run dry ever?? I had the same on my far back plugs when I was driving on a bad water pump for a month or two.. just replace the plugs and be happy.. if you had oil or coolant entering the cylinder at a large rate you would have a few more indicators then just a white and ashy plug..
#10
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I'd rule out fouling, and overheating.
Fouling will be a dark flat black deposit and or covered in oil
Overheating would cause a glazing of the insulator
http://www.ngksparkplugs.com/tech_su...qs/faqread.asp
Fouling will be a dark flat black deposit and or covered in oil
Overheating would cause a glazing of the insulator
http://www.ngksparkplugs.com/tech_su...qs/faqread.asp