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So what's the bump for?

Posted: Jul 03, 2025 9:43 PM
by gwb72tii
heater hose bump

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Re: So what's the bump for?

Posted: Jul 05, 2025 6:16 PM
by John in VA
Some 1600s & 2002s had a bulging heater hose - don't know the purpose.

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Re: So what's the bump for?

Posted: Jul 05, 2025 6:35 PM
by Aldo525
Maybe they act as expansion joints? Similar to boiler joints, but made of rubber.

Re: So what's the bump for?

Posted: Jul 06, 2025 12:38 AM
by Mike W.
Isn't it near/next to where one of the hose support brackets go? Might be to minimize movement of the hose with pressure surges in the coolant system. OK, I'm reaching here, but that's all I've got.

Re: So what's the bump for?

Posted: Jul 07, 2025 12:00 PM
by gadget73
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