Telling if my heads are commonized or not - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 07-15-2012, 09:45 AM Thread Starter
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Telling if my heads are commonized or not

Hey everyone I kinda need some help asap, I got a good buddy of mine that has some used heads that he took of a blown motor a couple months back that are in good shape (no cracks or anything) well they have been off of the truck for a couple months and the customer since replaced the engine and left.

fast forward to now. My truck is a 2005, I know that it had uncommonized heads on it with the 18mm dowels, my question is how do I tell if the heads he has are commonized or uncommonized by looking at them? there aren't any valve covers just heads rocker boxes and internals. any and all help is appreciated. thanks everyone.

l BRYAN l


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post #2 of 12 Old 07-15-2012, 10:32 AM
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You can measure the dowel pin spots at the ends of the heads. It will measure 18 or 20 mm. The location for those dowels are in the spots of the head bolts/studs. Even when you order new head gaskets from Ford it includes dowel pin adapters for the for the swap...

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post #3 of 12 Old 07-15-2012, 10:45 AM Thread Starter
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From what I have been reading though they aren't interchangeable after they went to commonized heads. If anyone could shed some light on this I'd greatly appreciate it.

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post #4 of 12 Old 07-15-2012, 11:21 AM
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You can use the commonized heads on pre-commonized engines.

Just get the dowell adapters as rentstdi said.

Mark
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post #5 of 12 Old 07-15-2012, 11:49 AM Thread Starter
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Ok what about swapping my rockers and such and injectors can I do that as well or will I need to get new rockers and fulcrums and injector hold downs? Or anything else that I may be missing or forgetting?

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post #6 of 12 Old 07-15-2012, 12:04 PM
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05 and up - all the same on those parts.

Mark
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post #7 of 12 Old 07-15-2012, 03:50 PM Thread Starter
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Just picked up those heads, all looks good to the eye the machine shop will tell the real story, but hey for $200 and they came with the exhaust maniflolds you can't beat it when mine are probably cracked and would have paid 1400+ for new ones.

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post #8 of 12 Old 07-15-2012, 11:05 PM Thread Starter
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here is a peak at the new/used heads that I stole for $200 for the pair


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post #9 of 12 Old 07-16-2012, 04:07 PM
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An "old" way to test the valve seats is to just fill the exhaust ports with diesel and see if anything comes through. Flip head and do the same thing with the intake ports. Just a quik way to see if you got to spend lots in labor or not...

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post #10 of 12 Old 07-16-2012, 04:23 PM
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commonized heads use different injector hold downs. the bolt is T45 on commonized heads.

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