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Water Pump Bypass Hose

BPK2

By BPK2
in BMW 2002 and other '02

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BPK2 Contributor

BPK2

Posted
Posted

The short hose from the thermostat to the water pump bypass sprung a leak while driving to work this morning. I would like to repair it as soon as possible. It is a simple hose and I was thinking about replacing with generic radiator hose. Does anyone know the diameter of the hose? An alternative would be to wrap it with duct tape and order a replacement. How long do you think this temporary fix would last?

 

Thanks.

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AceAndrew Grand Master

AceAndrew

Posted
Posted (edited)

BP - There are simply too many variables as to how long ducttape might last.  Maybe it would only last as long as a minute, maybe as long as the life of the car.

 

If you're working on the car I don't see why you couldn't eyeball the diameter?  As for radiator hose, well it's radiator hose so if you had to hack up something to work I don't know why it would be an issue.

Edited by AceAndrew

ADAMS Autosport

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FB73tii Mentor

FB73tii

Posted
Posted

An alternative would be to wrap it with duct tape and order a replacement. How long do you think this temporary fix would last?

 

TIP: In an emergency, a split cooling hose can be strengthened with a plastic bag and cardboard splint and then wrapped with tape. The key is to loosen or remove the radiator cap so there is no pressure on the system. Can't say how many miles you can drive this way, but it might just get you home. Did this with an old truck one time and was surprised at how well it worked. BTW, a 1.25" radiator hose (31.75mm)  will work on the 2002. My Ron Davis radiator has 1.25" outlets. --Fred

--Fred

'74tii (Colorado) track car

'69ti (Black/Red/Yellow) rolling resto track car

'73tii (Fjord....RIP)

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OriginalOwner Grand Master

OriginalOwner

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Posted

 If you're using duct tape, it can't be wrong.   But I'm thinking it will never be able to hold the pressure IF you twist-tight the radiator cap.

 

SO, my experience.  I was in Boyle Heights years ago and the coolant hose from the back of the head up to the heater inlet got about a 1-inch split, fortunately dead center in the middle of the riser portion.  In a parking lot I removed the hose, wiped off all the grease, then wrapped and wrapped with duct tape, then re-installed.

 

BUT, I only twisted the radiator cap to the first notch, just so it would not come off while driving, which would allow no system pressure to build up.  

Had no problem getting home (a 19 mile drive).  No water lost, engine temp was normal.

 

Cheers,

 

Carl

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