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Old 06-15-2010, 08:57   #1 (permalink)
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97 4.2 F150 Just Wont Run!

Hi guys, i am in need of major help, i just bought an 1997 V6 4.2l f150 from some guy for $400 because it was burning coolant, i just went through the entire top end and did, All new gaskets, had the heads checked for warping and cracks, did the timing cover gasket, new water pump, EVERYTHING on the top end was cleaned and redone, compression is 150+ on all cylinders, the rear drivers side plug was the only one leaking after running it.....someone please give me some ideas on wtf is wrong, thanks, Josh
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Old 06-15-2010, 09:34   #2 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

What are you trying to fix?
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Old 06-15-2010, 11:04   #3 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

1997 V6 4.2l f150, the top end was just rebuilt and its still burning coolant...
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Old 06-15-2010, 11:49   #4 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

Is it leaking or is it really burning the coolant? Have you had the block check test on the coolant to see if exhaust is getting in? Is it overheating?
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Old 06-15-2010, 12:47   #5 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

It's actually burning the coolant, truck sounds runs, drives amazing besides puffing out big clouds of white smoke, still has tonnes of power, it's only burning the coolant in one cylinder also (that's the only plug that's wet with coolant) and what do you mean by block check on the coolant?
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Old 06-15-2010, 12:48   #6 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

Oh and it's not over heating, btw
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Old 06-15-2010, 13:03   #7 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

A block check is a liquid that turns color if there's exhaust gas in the cooling system.
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Old 06-15-2010, 13:31   #8 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

How do you preform one? Is there a kit I could buy? Or does a shop have to do it? Thanks for the help
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Old 06-15-2010, 14:05   #9 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

You can buy the tester. AutoZone.com | Block Tester
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Old 06-15-2010, 14:12   #10 (permalink)
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Re: 97 4.2 F150 Just Wont Run!

Thanks so much! I'll post the resualts!
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