Miss due to low compression
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Miss due to low compression
I have a 2001 F150 supercrew 4.6 with 152,000 miles. It has had a slight roughness at idle and light throttle. I had it checked out and it has low compression (about 50 psi) on #7 cylinder. This was a bit of a surprise because I have run other 4.6 trucks well past 250,000 miles with no problems before trading them in.
Since the truck still averages 18.5 mpg and pulls well, I plan to keep running it until it begins to show problems, and then just replace the engine. Does anyone have any ideas for short term remedies that would buy more time?
Thanks,
James
Since the truck still averages 18.5 mpg and pulls well, I plan to keep running it until it begins to show problems, and then just replace the engine. Does anyone have any ideas for short term remedies that would buy more time?
Thanks,
James
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Joined: Jan 2004
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I've read some about the Slick 50 oil treatment. It may or may not help, but next time you change your oil maybe you could do a flush and the additive. The slick 50 kit costs about $30, but may be worth a shot at sealing up those rings.
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From: GANS
Originally Posted by Fairlane62
I have a 2001 F150 supercrew 4.6 with 152,000 miles. It has had a slight roughness at idle and light throttle. I had it checked out and it has low compression (about 50 psi) on #7 cylinder. This was a bit of a surprise because I have run other 4.6 trucks well past 250,000 miles with no problems before trading them in.
Since the truck still averages 18.5 mpg and pulls well, I plan to keep running it until it begins to show problems, and then just replace the engine. Does anyone have any ideas for short term remedies that would buy more time?
Thanks,
James
Since the truck still averages 18.5 mpg and pulls well, I plan to keep running it until it begins to show problems, and then just replace the engine. Does anyone have any ideas for short term remedies that would buy more time?
Thanks,
James
Engine Restore does help from what I've heard from a couple different people. Don't use Slick50, it is garbage.
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I'll give treatments a try
Everyone,
Thanks for the reply's. If its rings, the treatment may help, but if its a valve I'm probably just going to run it until it's begins to lose power, and then replace the engine. I don't want to do a valve job on such a high mileage engine.
Thanks,
James
Thanks for the reply's. If its rings, the treatment may help, but if its a valve I'm probably just going to run it until it's begins to lose power, and then replace the engine. I don't want to do a valve job on such a high mileage engine.
Thanks,
James
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Joined: Jan 2002
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From: GANS
Originally Posted by Fairlane62
Everyone,
Thanks for the reply's. If its rings, the treatment may help, but if its a valve I'm probably just going to run it until it's begins to lose power, and then replace the engine. I don't want to do a valve job on such a high mileage engine.
Thanks for the reply's. If its rings, the treatment may help, but if its a valve I'm probably just going to run it until it's begins to lose power, and then replace the engine. I don't want to do a valve job on such a high mileage engine.
or just keep a lookout for a low mileage motor out of a salvage yard.
You are right, though... I've seen people do valve jobs just to have the bottom end go out...
