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Old 08-29-2016, 08:29 AM   #1
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V10 Manifold Bolts

Has anyone had to deal with replacing the exhaust manifold bolts in an older V10. Mechanic says one bolt is rusted and broken but the exhaust is not yet leaking. Looking at the other bolts, most all are rusted very badly and I'm wondering how they can be replaced without breaking a number of them.What has worked for you? Chuck

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Triton V10 Gas
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Old 08-29-2016, 10:01 AM   #2
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I'm in the same boat. I have a broken one on #5 cyl. I noticed it last fall. I'm not sure how long its been broken, but I have 5000 miles on it.

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Old 08-29-2016, 10:44 AM   #3
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Just had one side done on my Workhorse and replaced with ARP stainless studs. I soaked the studs in Kroil over the winter and they came out by coaxing with an air gun. The broken one was removed by welding a nut to the protruding piece and then removing by working back and forth slowly. The Ford has aluminum heads so removal should be a little easier as mine is cast iron.
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Old 08-29-2016, 11:14 AM   #4
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Good info. I have never used Kroil but do use PB Blaster all the time. I will try that first and then the Kroil if no luck. I don't know how they differ. Chuck
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Triton V10 Gas
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Old 08-29-2016, 01:27 PM   #5
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I have replaced a number of stud sets on ford v10's, the only way to do a proper/ permanent repair is to cut the remaining studs and remove the manifolds, then you will have access to all of the studs for replacement. Most will come out with heat but some will need to be drilled and re tapped, be careful drilling some studs have a water jacket behind them, use a new stud to set drill depth. Once you repair all 20 holes just install one stud on each end of the manifold, slide the manifold on the studs and install nuts finger tight, now install the rest of the studs and tighten them from the center out to 18 ft lb.
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Old 08-29-2016, 02:03 PM   #6
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I concur with mrfix. I have done so many I'm getting a headache thinking about it. I also would weld a nut to the existing stud even if it broke flush with the head, just straight down the center with the Mig welder. The heat from the welder will also loosen the broken stud. If you choose to drill, just measure the depth of a hole and mark the bit with tape so you do not drill too deep. Ford now makes a stainless steel stud and nut.
Ford replacement Stainless steel Stud part number, W703902-S403
Ford replacement Stainless steel Nut part number, W701706-S2

  1. Torque the studs in the cylinder head to 71-115 lb-in (8-13 N-m).
  2. Torque nuts on studs to 204-239 lb-in (23-27 N-m).

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