1993 PU 4x4 3vz cracked #6 plug
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1993 PU 4x4 3vz cracked #6 plug
I recently had a problem with a cracked #6 spark plug on my 3vz. I have 229000 miles on it and someone mentioned that as the mileage gets higher, the #6 plug will crack ever 3k miles or so. Anyone ever heard of this? Why does this happen? Truck runs great, just replaced the starter, hoping it will keep going.
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#2
Interesting. This is the first I've heard of that. Due to the restrictive design of the exhaust crossover on the 3VZE, the rear cylinders (#6,#5) endure a lot of extra strain and heat. Because of this, bent valves and blown head gaskets are common. I can see how the plugs could be effected (in extreme cases). You can relieve the side effects of the poorly designed crossover by switching to headers.
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Well, I have never heard of this. My '89 has 450k miles on it. The only problem I had with it was a burnt valve and a timing belt idler pully. Never had problems with cracked spark plugs...
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Reason I mention
I thought it sounded wierd also, my uncle has the same exact truck, he developed this problem, where the #6 porcelin would crack about ever 3000 miles. At first I thought he was full of it; but recently it happened to me. I replaced the plug, and now about 3000 miles later, the engine seems to be starting to sputter; thats how if figured out it was a cracked spark plug before.....Well, I guess youve been lucky to not have this problem, or i am unlucky to get it.
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GreatLakesGuy
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