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No/low cylinder pressure.
- Thread starter Duber15
- Start date
Only times I would look at cam bearing replacement are very high mileage or a catastrophic failure internally on the motor and it made a shit load of metal. Inspect the bearings, and look at the journals on the cam you remove to look for scrapes or abnormal wear. Plus I am guessing you have the motor out on a stand if you are even debating on swapping cam bearings.
Duber15
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- Dec 14, 2015
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- Vehicle Year
- 1994
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- Automatic
After I did the compression test and found almost no pressure in cylinder #5, I unplugged #5 injector. Thought if it's a flat miss fire, didn't want to continue dumping unburnt fuel and give the chance of washing the rings. The truck runs worse with it disconnected, as expected. But with everything connected, it contributes a fair amount. Just not on the same level as the rest.
IF it is a burnt valve, are these classic symptoms?
Just hoping to diagnose it as accurately as possible before I make any considerable purchases. The ideal scenario would be to find a crashed explorer/4.0L ranger and rebuild a motor how I want while keeping the truck alive.
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IF it is a burnt valve, are these classic symptoms?
Just hoping to diagnose it as accurately as possible before I make any considerable purchases. The ideal scenario would be to find a crashed explorer/4.0L ranger and rebuild a motor how I want while keeping the truck alive.
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adsm08
Senior Master Grease Monkey
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Ford Technician
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- Dillsburg PA
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- 4.0 V6
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If that is the route you go I would do the cam bearings. If you are just doing a cam, no, if you are tearing the engine completely apart, yes.
Duber15
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- 1994
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- Automatic
Anyone have am "ideal" parts list to make a stout/solid running 4.0? I've looked at tons of parts wondering what is the best combo if I were to do a complete rebuild on another motor.
Certain items would be new heavy casted heads, 422 cam and pushrods, hv oil pump, headers, clean the intake casting up and so on.
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Certain items would be new heavy casted heads, 422 cam and pushrods, hv oil pump, headers, clean the intake casting up and so on.
Sent from my SM-G900R4 using Tapatalk
http://www.enginebuildermag.com/2001/04/rebuilding-the-ford-4-0l-pushrod-v6/
Think I got this link off the site a few years back. Or found it while researching some options. either way very good info to be had in the article.
Think I got this link off the site a few years back. Or found it while researching some options. either way very good info to be had in the article.
Duber15
Well-Known Member
- Joined
- Dec 14, 2015
- Messages
- 70
- Vehicle Year
- 1994
- Transmission
- Automatic
I've read that Web page, it's informative for factory style rebuilds. If I could go the rebuild route, I'd like some beneficial goodies while it's apart, or I could just repair only the issue and go on but that's not fun.
Sent from my SM-G900R4 using Tapatalk
Sent from my SM-G900R4 using Tapatalk
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