SD UVCH
- Thread starter 79jasper
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79jasper
Active member
"We also have seen numerous problems (poorly shielded wires, wires not ROUTED properly<ie firing cylinders out of proper firing order!) with aftermarket valve cover gaskets and valve cover wiring (especially DORMAN brands)…so we highly recommend replacing the UVC harnesses and gaskets with OEM Ford gaskets and wiring only. We have actually lost an engine due to the Dorman gaskets/wiring, and have spoken with atleast one other customer that lost 2 engines (rods through the block) that was traced back to a faulty Dorman UVC gasket & harness."
Interesting.
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Bugman
Active member
It would be interesting to see how a after market wiring harness would cause a cylinder to get out of firing order even if they were routed improperly. As long as you connect them properly there should be no problem with that. I can understand poorly shielded wires but loosing a engine due to a bad gasket or wire? I think that they are pushing that a ways too far.
But I'll stick with factory when it comes to something like the under valve cover wiring harness and gaskets.
But I'll stick with factory when it comes to something like the under valve cover wiring harness and gaskets.
Patrick Feeley
Member
I think the engine had some other changes that probably made them quieter, but my 94 was much louder than my 97. Cheers!
As a professional electrician I know exactly what this is.
Called cross talk.
The electricity going through wires causes magnetic frequencies.
Those frequencies are carried by the wire that is most susceptible.
This is why bundles of wires like this that carry important information (signals) are shielded.
No/bad shield shiz gets phuked up.
Saw this happen on a 5 million dollar wind turbine.
While I was up it.
Causes interesting problems no matter what application.
From 5v and up.
If not properly done it will wreak havoc at the least expected times.
79jasper
Active member
I definitely see how it can cause problems.
Do you have experience with the dorman one's?
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kanuck15
New member
So breaking this down to basics you just cut the ends off an OBS harness, route them so they meet in the middle of the harness and connect them to the SD repair pigtails? then use SD gaskets and SD UVCHs?
79jasper
Active member
kanuck15
New member
Seems simple. Might do this to the engine I am building in the garage. Would clean stuff up a lot
jwlandry
New member
sub'd on this. I would like to do this as well.
I want to do the engine harness and all though.
I want to do the engine harness and all though.
m j
Active member
is there an international part number for the pigtail?
allaint # is AP0016
allaint # is AP0016
m j
Active member
I did it with the Dorman parts.
what a PITA wrapping the wires in ground strap and then the tinfoil
what a PITA wrapping the wires in ground strap and then the tinfoil
79jasper
Active member
Let us know how they hold up.
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m j
Active member
anyone ever compare valve covers from a super duty and OBS?
I think the OBS is clearance for the two valvecover plugs
I think the OBS is clearance for the two valvecover plugs
ghohouston
Active member
I don't believe there's any difference between the late obs' s and sd valve covers. I can't say about the early obs' s...
79jasper
Active member
I was told they're the same.
Well far as shape and size.
I've heard some are thicker, which help to quieten the engine.
But the difference Is in the UVCH gasket.
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Well far as shape and size.
I've heard some are thicker, which help to quieten the engine.
But the difference Is in the UVCH gasket.
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JCart
Member
Just so I'm clear the pin order stays the same, just the SD is all on one plug right? E.g., passenger side outside VC cut front plug off OBS harness connect to 1/2 SD new pigtail then cut rear OBS plug and connect to SD plug keeping all wires in order front to back?
My thinking was to connect with butt connectors and dielectric grease inside connector then heat shrink tube over each wire that sound reasonable? Open to suggestions.
Also I'll add since using dielectric grease and Stancor GP relay I've not had any pins burn up on my harnesses at all, back in '98 my first psd ('96) with stock GP relay was pretty common to be replacing the relay and burnt pins where all too common.
Lastly purchased SD and OBS parts pigtails and UVC harnesses from Clay at Riff Raff great pricing and shipping to Canada.
jrc
2000wa250
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I can't remember where the glow plug wires are on the obs. Pretty sure they are on either side of the plugs, so those move for the SD plug.
I wouldn't use butt connectors without adding solder. Too important a connection IMO to risk coming detached going down the road or not having a good transmission of signal
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I wouldn't use butt connectors without adding solder. Too important a connection IMO to risk coming detached going down the road or not having a good transmission of signal
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