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what would cause the spark plug boots to blister on 2 ...
Sent to Car Experts February 21 12:28 PM

what would cause the spark plug boots to blister on 2 plugs at the tip of the plug . 3 sets new wires . 135000 miles 2002 chevy express 3500 5.7

 

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2002 Chevrolet g3500 5.7

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mass air flow sensor crankshaft position sensor

Customer (name blocked for privacy)
Status:  Closed   Value: $9
Answer
February 21 12:32 PM (3 minutes and 49 seconds later)
         
ACCEPTEDCheck Mark

Hi, Welcome to Just Answer!

The Number one cause of a plug boot blistering is from oil. If your valve cover is leaking oil or oil is spilled when refilling after an oil change, this will swell/blister the boots. Oil along with heat is the cause.

If you need further assistance let me know.



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Jaxer Smith -- Auto Mechanic -- 100% Positive Feedback on 765 Car Accepts
17 yrs experience and currently own and operate an Auto Repair Center
Reply
February 21 12:39 PM (7 minutes and 41 seconds later)
         
the wires were all clean and dry no oil.I put a set on 2 days ago and the #3 and #5 are starting to go bad .
Customer (name blocked for privacy)
Answer
February 21 12:44 PM (4 minutes and 23 seconds later)
         
REPLIEDCheck Mark

Are the factory heat shields still there. (thin metal shields) ? If not you can order them from the dealer. They just bolt into place.



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Jaxer Smith -- Auto Mechanic -- 100% Positive Feedback on 765 Car Accepts
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February 21 12:47 PM (2 minutes and 57 seconds later)
         
Reply to Jaxer Smith's Post: The truck never had the shields . Only the tips of 2 boots are blistering .the sides show no signs of heat . I ve had the truck for years this is new
Customer (name blocked for privacy)
Answer
February 21 1:01 PM (13 minutes and 59 seconds later)
         
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Jaxer Smith -- Auto Mechanic -- 100% Positive Feedback on 765 Car Accepts
17 yrs experience and currently own and operate an Auto Repair Center
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February 22 5:41 PM (1 day and 4 hours later)
         
i use ac delco plugs wires with silicone
Customer (name blocked for privacy)
Answer
February 22 5:56 PM (14 minutes and 51 seconds later)
         
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Jaxer Smith -- Auto Mechanic -- 100% Positive Feedback on 765 Car Accepts
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February 22 6:08 PM (11 minutes and 48 seconds later)
         
it hasnt had heat sheids for 130000 miles.no over heating,all stock . Im in phx and this never happened in the summer . not much air flow at the stoplite in 120 degrees. only two plugs do this
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Answer
February 22 6:29 PM (21 minutes and 12 seconds later)
         
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Jaxer Smith -- Auto Mechanic -- 100% Positive Feedback on 765 Car Accepts
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February 22 6:46 PM (17 minutes and 28 seconds later)
         
i have not heard any exhaust leaks . This might be related. when i start it cold it idles and runs ok .after a couple minutes it starts running a little rough at idle . when you give it gas it stumbles misses shudders and eventually stalls. let it cool down a cpouple minutes and it idles ok
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February 22 8:40 PM (1 hour and 53 minutes and 22 seconds later)
         
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