ICP Sensor leaking - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 4 (permalink) Old 02-17-2017, 11:19 AM Thread Starter
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ICP Sensor leaking

2002 F-350SD, 7.3L. Can someone tell me what the part is that the ICP screws into? Mine is stripped and spraying oil.

Last edited by klhansen; 02-17-2017 at 12:22 PM. Reason: fixed spelling of ICP
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post #2 of 4 (permalink) Old 02-17-2017, 12:28 PM
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If the threads are truly stripped where the sensor screws into, you'll probably need to replace the cylinder head. Ouch!
But before you do that, inspect the sensor threads themselves and be sure it's not whats stripped. It could just be the o-ring that seals the sensor where it screws into the head. Does the sensor actually tighten into the port or spin free?

If it is the cylinder head that's the problem, a hydraulics shop may be able to repair it with an insert pressed into the port after it's machined out to accept the insert. I don't think that a helicoil would work, as the top end of the threads would be too rough to form a good seat for the o-ring. The specs for an SAE boss o-ring connection call for a smooth taper at the top of the threads. Maybe the shop could cut a larger groove and use a fatter o-ring than the stock one.

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post #3 of 4 (permalink) Old 02-17-2017, 03:36 PM
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timesert but I'd be worried about the shavings getting into the high pressure oil system.

There are other ports you could use for the ICP, but you'd still have to plug the failing port with something.

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post #4 of 4 (permalink) Old 02-17-2017, 04:48 PM
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Quote:
Originally Posted by greenskeeper79 View Post
timesert but I'd be worried about the shavings getting into the high pressure oil system.

There are other ports you could use for the ICP, but you'd still have to plug the failing port with something.
I don't think a timesert would work either. Might be better than helicoil, but the profile at the top of the hole would still not be in spec.

Using another port for the ICP is a good idea and would work. You might be able to tap the damaged port for a pipe plug, which will seal without an o-ring. Whether the size is close enough remains to be seen. A grease filled tap will contain the chips if you're very careful.

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