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KM4901 part punctured

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Old Aug 20, 2025 | 10:19 PM
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KentuckyF150.02's Avatar
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Default KM4901 part punctured

Hello! I have a 02 F150 with a 4.6 v8 I smelled something off, and a couple days later popped the hood and I was spraying out coolant, I thought it was the hose so I replaced it, turns out it was this part, I'm not sure what it fully does and I have no idea how to replace it, if anyone has knowledge on replacing this sort, it sits right behind an alternator, it has a tiny puncture hole, I jb welded it and am going to see if that works as a temporary fix tomorrow, thank you for any help!

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Old Aug 20, 2025 | 11:58 PM
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Originally Posted by KentuckyF150.02
Hello! I have a 02 F150 with a 4.6 v8 I smelled something off, and a couple days later popped the hood and I was spraying out coolant, I thought it was the hose so I replaced it, turns out it was this part, I'm not sure what it fully does and I have no idea how to replace it, if anyone has knowledge on replacing this sort, it sits right behind an alternator, it has a tiny puncture hole, I jb welded it and am going to see if that works as a temporary fix tomorrow, thank you for any help!

looks like it’s just threaded/screwed in…. have you tried to back it out ?
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Old Aug 21, 2025 | 03:56 AM
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You will note that the new part has a red sealant on the threads. The existing part likely had the same sealant when it was installed and some of these sealants also "lock" the part in place. High torque may be required to remove old part and may require some creative thinking.

Assuming you have an aluminum intake manifold and not a plastic manifold with an aluminum crossover that the bypass hose fitting screws into. I would first get the new part in my hands and make sure that it is the correct part for your application. This also assumes that loosening efforts have been unsuccessful Large box end wrench should work but if not I would then take a hammer and bend the tubing nipple off by bending back and forth or by cutting with hacksaw to remove the small nipple. Once nipple is out of the way use a socket and breaker bar to remove the fitting.
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Old Aug 21, 2025 | 10:13 AM
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If there is not a plastic manifold, as far as I know, heat has been a pretty good thing to apply. heat the fitting.
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Old Aug 23, 2025 | 04:06 AM
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KentuckyF150.02,

Any update?

Jimboy
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Old Aug 27, 2025 | 08:50 AM
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Originally Posted by Jimboy
KentuckyF150.02,

Any update?

Jimboy
I put epoxy over it until I have more time to actually go in there and work on on, so far it's seems to be sealed though, engine isn't over heating and don't smell coolant
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Old Aug 27, 2025 | 08:51 AM
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Originally Posted by Jimboy
You will note that the new part has a red sealant on the threads. The existing part likely had the same sealant when it was installed and some of these sealants also "lock" the part in place. High torque may be required to remove old part and may require some creative thinking.

Assuming you have an aluminum intake manifold and not a plastic manifold with an aluminum crossover that the bypass hose fitting screws into. I would first get the new part in my hands and make sure that it is the correct part for your application. This also assumes that loosening efforts have been unsuccessful Large box end wrench should work but if not I would then take a hammer and bend the tubing nipple off by bending back and forth or by cutting with hacksaw to remove the small nipple. Once nipple is out of the way use a socket and breaker bar to remove the fitting.
I'll give that a try when I have time off, super busy and it's holding with epoxy so far
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