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Author Topic: heater bypass failiure?  (Read 704 times)

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tigerwoods

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heater bypass failiure?
« on: 22 October 2007, 19:34:31 »
i have what i beleive is a catastrophic failiure of the heater bypass valve on my 2.6 cdx.
 can anyone tell me a. how to access the damn thing and b. how can i confirm that this is the problem and not a head gasket failiure!
 thanks folks
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TheBoy

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Re: heater bypass failiure?
« Reply #1 on: 22 October 2007, 19:48:27 »
Remove scuttle for access :)

Unlikely to be HG :)
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omegalord

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Re: heater bypass failiure?
« Reply #2 on: 22 October 2007, 21:05:14 »
Yeah.

If you take the wipers and scuttle off it can be done without taking the plenum off (although it is much easier with plenum off imo)

Not that hard to do , just a bit fiddly , and definitely grazed knuckles aplenty!  :o
« Last Edit: 22 October 2007, 21:05:33 by omegalord »
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ians

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Re: heater bypass failiure?
« Reply #3 on: 23 October 2007, 10:14:00 »
presumably you are losing coolant?

You can just about shine a torch on it if you stand next to the drivers side wing.  It will likely look wet or if not you'll see brownish staining in the vicinity if its been leaking for any time.   Remember it may or not leak depending on whether you have AC on or off.
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Matchless

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Re: heater bypass failiure?
« Reply #4 on: 23 October 2007, 10:59:35 »
Wont be head gasket.
Most likely to be heater bypass valve but could be any of the hoses around back of engine, these sometimes split or wear through if not replaced properly following work in that area.
Leaks from coolant bridge, oil heat exchanger or thermostat seal tend to be slow weeps rather than larger leaks.
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