SD UVCH

Peroni · Jan 18, 2014

Swaan said:
There is a little blurb somewhere on swamps site about those dorman stuff.

I believe this is what you are talking about? 2nd page from the end.

79jasper · Jan 18, 2014

Peroni said:
I believe this is what you are talking about? 2nd page from the end.

"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 · Jan 18, 2014

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.

Patrick Feeley · Jan 18, 2014

Redman84 said:
Is this for sound deadening? If so, is it noticeably better than the single wall VCs?

I think the engine had some other changes that probably made them quieter, but my 94 was much louder than my 97. Cheers!

KBMKVIII · Jan 25, 2014

79jasper said:
"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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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 · Jan 26, 2014

KBMKVIII said:
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.

I definitely see how it can cause problems.

Do you have experience with the dorman one's?

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KBMKVIII · Jan 26, 2014

No sir I saw other ppl have problems from connectors to miss fires. Homie don't play that.

kanuck15 · Jan 26, 2014

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 · Jan 26, 2014

kanuck15 said:
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?

That's what I got from it...

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kanuck15 · Jan 26, 2014

Seems simple. Might do this to the engine I am building in the garage. Would clean stuff up a lot

jwlandry · Jan 26, 2014

sub'd on this. I would like to do this as well.

I want to do the engine harness and all though.

m j · Mar 8, 2014

is there an international part number for the pigtail?
allaint # is AP0016

m j · Mar 10, 2014

I did it with the Dorman parts.
what a PITA wrapping the wires in ground strap and then the tinfoil

79jasper · Mar 10, 2014

Let us know how they hold up.

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m j · Mar 11, 2014

anyone ever compare valve covers from a super duty and OBS?
I think the OBS is clearance for the two valvecover plugs

ghohouston · Mar 11, 2014

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 · Mar 11, 2014

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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MossBack · Mar 12, 2014

All are the same... I have a 95, 97, and a 01 blocks at the shop... All have the 2 indents where the plugs are on the OBS trucks...

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JCart · Mar 12, 2014

kanuck15 said:
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?

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 · Mar 12, 2014

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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