How to insulate a replacement intake hose from engine heat
Non-OEM replacement hoses often cannot handle high engine and coolant temperatures, leaving car owners worried about heat damage when original parts are no longer manufactured. Without proper thermal protection, makeshift materials like flexible PVC can overheat against hot engine components.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Wrap it in exhaust header wrap
- 2drying on a lower heat setting
- 3applying insulation tape
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“I just don’t wanna burn my house down lol”source ↗
“I was trying to be sure if I did it correctly as it’s my first time doing this. I have no prior knowledge to this.”source ↗
“I installed this since my landlord didn’t wanna to.”source ↗
“It’s my first time doing this, I was wondering why the hose was getting very hot.”source ↗
“I understand that , but when I put my hand on the hose for a minute, it’s not warm, it’s quite hot. That’s why I was questioning . I just want to be sure I’m doing it correctly.”source ↗
“My original snorkel-to-airbox hose has disintegrated and no OEM replacement exists (due to MG Rover being defunct) so I have recently bought a flexible PVC duct that fits the dimensions. I realize now however that the hose is touching the coolant hose and I'm worried PVC will not cope well with the temperatures.”source ↗
Where this came up
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