Opinions on replacing UVC harness
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It's not the mileage that counts, it's the age. Just inspect the connection pins for corrosion and if the locking tab is in good shape. That one VC bolt by the firewall is a ***** to get back in. I would inspect the other GP's, if any show swelling I'd replace them. Use only the IH or Motorcraft/Beru GP's.
I'll check out the pins and locking tab.
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4,504 Posts
Is this the locking tab you mentioned?
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That's the repair shims that Ford sold to shim up the clips on the older UVCHs. They charged about $10 for three of the shims. That's why some guys use the 50cent mod, consisting of slipping a quarter under the locking clip.
Neither will work well on the newer UVCHs, as they have plastic nubs under the locking clip that make them springier. I suppose you could trim off the nubs and use the shims or quarters, but the UVCH sells for about $25 a side from RockAuto (Chinese made Dorman product, but identical to the Chinese made Ford, Alliant or International UVCH), and it makes sense to just replace it when you're under the VC doing GPs or injectors. Same goes for glow plugs - once you're in there, just replace all 4 GPs.
Neither will work well on the newer UVCHs, as they have plastic nubs under the locking clip that make them springier. I suppose you could trim off the nubs and use the shims or quarters, but the UVCH sells for about $25 a side from RockAuto (Chinese made Dorman product, but identical to the Chinese made Ford, Alliant or International UVCH), and it makes sense to just replace it when you're under the VC doing GPs or injectors. Same goes for glow plugs - once you're in there, just replace all 4 GPs.
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383 Posts
How did you determine that only one GP was bad?
My scanner gave me the first clue (P0676)
then I did the ohm's test to verify, starting at the main connector leading to the valve cover plug. Testing all 4 pins confirmed it was #6.
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9,053 Posts
I like the one piece Dorman.
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Php has seen a few engine failures from Dorman uvch.
I did notice the int'l uvch I picked up for my dads truck was made in China. But I don't think Dorman makes them, and they are 40 bucks from diesel Orings
I did notice the int'l uvch I picked up for my dads truck was made in China. But I don't think Dorman makes them, and they are 40 bucks from diesel Orings
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I saw a video with a shop laying "two failures due to them not shielded". None are shielded. There is shielding in the main engine harness. Unless the wires were routed incorrectly from the pins, I don't see how that could happen. I can see how a company writing programs could though. No I'm not saying that's how he hurt two engines and laid it off on a UVCH.
I can also say in over three decades I have never come across something like that and not be waving this " defective " product in the air, which he was not.
I can also say in over three decades I have never come across something like that and not be waving this " defective " product in the air, which he was not.
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2,849 Posts
It's not something they advertise. I learned from one of the guys that works there.
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2,849 Posts
update I did a little more digging. swamps has had engine failures from dorman uvch as well. they come poorly shielded and sometimes the wiring Is incorrect.
its in the injector diagnostics pdf. near the bottom.
its in the injector diagnostics pdf. near the bottom.
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