SOHC heads on a OHV..... - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 01-10-2007
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SOHC heads on a OHV.....

would there be any benefit from this? and would they fit?
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  #2  
Old 01-10-2007
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they wont fit because of the camshaft placement of the OHC and the OHV.
OHC is two cams placed over the block so no pushrods are needed just lifters
OHV has the cams placed in the block like all pushrod powered engines
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  #3  
Old 01-10-2007
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oooo yea.....

hmmmm....i think i have a blown head gasket on my truck.......i wonder what it would cost and be worth it to have the heads ported and polished while they were off........
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Old 01-10-2007
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the motors are completely different and blow head gaskets on OHV are common on higher millage trucks it isnt to bad to swap the gaskets out take a better part of a day..
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  #5  
Old 01-10-2007
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SOHC Swap!
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  #6  
Old 01-10-2007
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Quote:
Originally Posted by Redneckstone
the motors are completely different and blow head gaskets on OHV are common on higher millage trucks it isnt to bad to swap the gaskets out take a better part of a day..
yea.....my truck isn't got that many miles on it.....it only has 90,000 miles on it............

would it be worth while to do both while i was at it? what about porting and polishing the heads while they are off?
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Old 01-10-2007
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Quote:
Originally Posted by fuze
SOHC Swap!
i would LOVE too....but i dont have the patience to get it done......
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  #8  
Old 01-10-2007
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find out the cost..id port and polish mine if i had them off.. more airflow is always better!
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  #9  
Old 01-10-2007
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yea if i port and polish them, then i am going to put on headers with the new heads...
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  #10  
Old 01-10-2007
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It took me a weekend to change out the lower intake gasket on my '98, it was my first time diving into the 4.0L OHV, I'm not a great wrencher, but I'm not terrible either. I would give yourself a few days for the head gasket job.

THIS will help get you as far as the lower intake gasket.
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  #11  
Old 01-10-2007
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so i take it that your gonna drive up here 1 weekend and buy me and gumby lunch and beer.. we can have it done in less then a day(as long as nothin else is wrong with it)
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Old 01-10-2007
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Quote:
Originally Posted by lifted97ranger
yea.....my truck isn't got that many miles on it.....it only has 90,000 miles on it............

would it be worth while to do both while i was at it? what about porting and polishing the heads while they are off?
yes its a smart idea to do both while your in there..
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Old 01-10-2007
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Quote:
Originally Posted by Big04Ranger
so i take it that your gonna drive up here 1 weekend and buy me and gumby lunch and beer.. we can have it done in less then a day(as long as nothin else is wrong with it)

hehehe, im down for that!
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  #14  
Old 01-10-2007
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if you can spend the time to not have thr truck running and want to do it then i would say get the P&Ped but to be honest you probably wont noticed a big difference at all unless you decided to go and put forced indduction into it along with other mods.. P&Ping a head or heads is more of a thing to do as a benifit mod... but defianately if i had the heads off i would do it for the hell of it....
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  #15  
Old 01-10-2007
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Quote:
Originally Posted by Big04Ranger
so i take it that your gonna drive up here 1 weekend and buy me and gumby lunch and beer.. we can have it done in less then a day(as long as nothin else is wrong with it)
i would except that it wont run worth a crap.....i dont think i would trust it to drive up there......i barely trusted it to drive 10 miles to my uncle-in-law so he could check it out....
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  #16  
Old 01-10-2007
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you could do valve springs at the same time also.
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  #17  
Old 01-10-2007
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Quote:
Originally Posted by lifted97ranger
yea.....my truck isn't got that many miles on it.....it only has 90,000 miles on it............

would it be worth while to do both while i was at it? what about porting and polishing the heads while they are off?
I always say do them as a pair. Usually if you don't you end up doing the other shortly.
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  #18  
Old 01-11-2007
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If your going to have the heads off due to a gasket, odds are they are going to need to be resurfaced. .010 off on a decking can cause another set to go.. Might as well have the heads surfaced/decked as well as a valve job. It will get rid of all the carbon and buildup you have had over those 90k miles as well.

D.
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  #19  
Old 01-11-2007
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Quote:
Originally Posted by D.
If your going to have the heads off due to a gasket, odds are they are going to need to be resurfaced. .010 off on a decking can cause another set to go.. Might as well have the heads surfaced/decked as well as a valve job. It will get rid of all the carbon and buildup you have had over those 90k miles as well.

D.
what do you mean by resurfaced? do they shave a bit off the bottom? what do you think i would be looking at in price to have the heads resurfaced and rebuilt?
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  #20  
Old 01-11-2007
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Quote:
Originally Posted by Ranger1
I always say do them as a pair. Usually if you don't you end up doing the other shortly.
I agree 100%.

Quote:
Originally Posted by lifted97ranger
what do you mean by resurfaced? do they shave a bit off the bottom? what do you think i would be looking at in price to have the heads resurfaced and rebuilt?
In most cases it involves shaving (milling, grinding, etc.) the bottom until it's flat.

If you so decide to tear into it, then consider also going with the 4.0L OHV "rocker arm refresh kit" from Delta Cams (Part # F040 KIT) which is meant to address the issue of pushrod wear that the 4.0L is apparantly prone to. More on that issue can be found towards the end of this article, which you should be referencing in any case: Rebuilding The Ford 4.0L Pushrod V6
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  #21  
Old 01-11-2007
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Quote:
Originally Posted by Rockledge
I agree 100%.

In most cases it involves shaving (milling, grinding, etc.) the bottom until it's flat.

If you so decide to tear into it, then consider also going with the 4.0L OHV "rocker arm refresh kit" from Delta Cams (Part # F040 KIT) which is meant to address the issue of pushrod wear that the 4.0L is apparantly prone to. More on that issue can be found towards the end of this article, which you should be referencing in any case: Rebuilding The Ford 4.0L Pushrod V6
nm....thanks...
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  #22  
Old 02-15-2007
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Hey lifted97ranger, just to let you know, if you still think you have to replace the head gasket on your truck you should check the cylinder heads when they are off. I was replacing the head gaskets on my cousin's 99 4.0L ohv and we noticed that the heads were cracked and the coolant was leaking through the cracks, not through the gasket. The heads had a hairline crack between the intake and exhaust valves in three of his combustion chambers. We talked to a guy at a machine shop near us and he said that he has seen this happen to 4.0L ohv's before. I guess that coolant runs between the two valves, and due to rapid temperature change the heads can crack. he had to buy new heads, and he got a pair that had this coolant line filled in. Just wanted to let you know about this problem, so check your heads if you take them off.
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  #23  
Old 02-15-2007
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Oh yeah, and did you fix this problem before you made the post about the screamin demon coil pack, just wondering.
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  #24  
Old 02-15-2007
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yea i fixed the problem before the coil pack........

thanks for the heads up......haven't seen a drop in coolant at all......i dont think i had a head or head gasket problem......the dealership sold me the wrong plugs at the begininng of last year....when i went to a different dealership they gave me the correct ones....it fixed the problem...
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