Cam Belt Question
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Senior User
Joined: Nov 2006
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From: Northern New Mexico
Cam Belt Question
A friend of mine has a 2000 Explorer with the 4.0 Liter Overhead Cam engine. About 170,000 miles on the odometer. He has been told that he needs to replace the cam belt. To do so will cost about $3,000 since the engine has to be pulled to do this.
Does this seem right? Assuming the belt needs to be replaced, which could be possible given the mileage, does the engine have to come out to replace a drive belt?
I know nothing of this engine and have not looked under the hood. Is this belt internal or an external "serpentine"?
Thanks is advance for any thoughts.
Does this seem right? Assuming the belt needs to be replaced, which could be possible given the mileage, does the engine have to come out to replace a drive belt?
I know nothing of this engine and have not looked under the hood. Is this belt internal or an external "serpentine"?
Thanks is advance for any thoughts.
Senior User
Joined: Sep 2003
Posts: 329
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From: Virginia
The 4.0 SOHC engine actually uses a chain drive (not a belt) and this generation of the 4.0 has been known to have timing chain issues.
And yes, the engine does have to be removed to replace the timing chains. The drive assembly for the right side head is located at the rear of the engine.
Here's a link to reference...
Timing chain replacement on a 2002 explorer 4.0 l | Ford Explorer and Ranger Forums - Serious Explorations
Hope this helps.
And yes, the engine does have to be removed to replace the timing chains. The drive assembly for the right side head is located at the rear of the engine.
Here's a link to reference...
Timing chain replacement on a 2002 explorer 4.0 l | Ford Explorer and Ranger Forums - Serious Explorations
Hope this helps.
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Joined: Nov 2006
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From: Northern New Mexico
Thank you for the prompt response and the link.
Reading old posts, I see this is so. Three cam chains with a "Jack Shaft".
The last time I heard of a "Jack Shaft" it was on a Triple Expansion steam engine in a Liberty Ship.
Too bad for my friend. He should have stuck with the Pushrod OHV engine!
Reading old posts, I see this is so. Three cam chains with a "Jack Shaft".
The last time I heard of a "Jack Shaft" it was on a Triple Expansion steam engine in a Liberty Ship.
Too bad for my friend. He should have stuck with the Pushrod OHV engine!
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$3000. I would consider a newer engine. All the 4.0 SOHC motors can be interchanged without much trouble. The 4x4 models have a balancer, but guess what? You don't really need it.
So find a low mile V6 Mustang that got t-boned, put all the induction and exhaust on it and drive on for hundreds if not thousands less.
Serving suggestion, and note the site linked above has an extensive thread on the subject, with multiple members doing swaps.
So find a low mile V6 Mustang that got t-boned, put all the induction and exhaust on it and drive on for hundreds if not thousands less.
Serving suggestion, and note the site linked above has an extensive thread on the subject, with multiple members doing swaps.
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ONE MORE THING:
If your friend misunderstood the cam chain vs. belt, fine, read no more. BUT IF HE WAS TOLD BY A SHOP TO REPLACE THE BELT, THAT SHOP SHOULD NOT TOUCH HIS VEHICLE.
If they think it's a belt, they have no business working on that or any other engine.
If your friend misunderstood the cam chain vs. belt, fine, read no more. BUT IF HE WAS TOLD BY A SHOP TO REPLACE THE BELT, THAT SHOP SHOULD NOT TOUCH HIS VEHICLE.
If they think it's a belt, they have no business working on that or any other engine.
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From: Northern New Mexico
Does anyone know if this engine has "Interference" potential? Will seriously out of time valves contact the pistons resulting in catastrophic failure? If there is not can the thing be driven around town for a while? Considering the age and mileage I was going to suggest he just drive it until it dies.
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Senior User
Joined: Sep 2003
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From: Virginia
I am not sure, but here is a thread discussing that very topic...
https://www.ford-trucks.com/forums/1...ce-engine.html
Regards,
https://www.ford-trucks.com/forums/1...ce-engine.html
Regards,
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Does anyone know if this engine has "Interference" potential? Will seriously out of time valves contact the pistons resulting in catastrophic failure? If there is not can the thing be driven around town for a while? Considering the age and mileage I was going to suggest he just drive it until it dies.
Our '98 was noisy beast at start up. We have an OHV '99 now and it makes none of the rattle the SOHC made...
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