4.2 engine flush fixed it

4x4r · #1 05-30-2009, 10:20 AM

I rarely post but just figured i'd say, that my 2001 4x4 f150 with the 4.2 147,000 miles has been smoking after start up lately with 6 qts of oil addded. I never had the owners manual since day one. I always added 5qts of oil and it was perfect - then i realized i was always a quart low. well when i added the extra qt it would only smoke at start up. I was prepared for the cool v8 swap or a new set of heads or a rebuild... I used carquest brands engine flush and now it runs perfect, NO SMOKING and i'm back to using 6qts of oil as required. I doubt that 5qts ever affected anything because i changed the oil at 3,000 miles ALWAYS. must have been the varieties of cheap oils that sludged up my rings etc... or just coincidence that it started to smoke a little at start up around the same time i read it takes 6qts.. but either way my trucks been fine since i used the engine oil flush.

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glc · #2 05-31-2009, 10:56 AM

Now make sure you use the recommended oil - which is 5W20 that meets Ford 930 specs, and a quality filter. You cannot go wrong with Motorcraft oil and filters, both of which are available at Walmart.

daves03 · #3 06-09-2009, 01:07 AM

Im not sure what you did to flush it or what kit you had but i work for NTB and we have "oil system cleaner" and i dont like it. I put it in before i did my oil change and now the front of the pan leaks, i was told it was the chemicals in the cleaner that eats away at the seal. So no more cleaner for me and now i need to replace the front gaskit.

Paralyzer · #4 06-09-2009, 02:48 AM

smoking at startup is usually due to valve seal leaks, its possible the engine flush had a seal swelling additive. might only be temporary but who cares...

TXhustla · #5 06-16-2009, 04:31 AM

Quote:

Originally Posted by daves03

Im not sure what you did to flush it or what kit you had but i work for NTB and we have "oil system cleaner" and i dont like it. I put it in before i did my oil change and now the front of the pan leaks, i was told it was the chemicals in the cleaner that eats away at the seal. So no more cleaner for me and now i need to replace the front gaskit.

What brand did you use?