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Old 15 Oct 2012, 12:40 pm
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Default more heater issues

I have looked for other info on heater problems but nothing seems specific. Sorry if I have not looked hard enough but I need to try something. I heard gurggling noises from dash when warm outside. When time to turn on heat this fall, no heat. I tried refilling coolant and checked for flow in heater core. I can get some flow through it but not much with garden hose. I started engine with hoses disconnetected from core and saw very little flow from heater input. I wonder if the water pump is bad. The coolant has a brown color so I also wonder if head gasket blown. I dont know what to expect for flow through core or out of hoses. I tried bleeding as well but maybe doing that wrong also. I had steady stream of coolant from bleeder and a little heat, but it never gets as warm as it should.

BTW - the advice I got on cam position sensor was spot on. Thanks.
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Old 15 Oct 2012, 03:30 pm
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Default Re: more heater issues

try backflushing the heater core, could be slightly plugged.
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Old 16 Oct 2012, 03:49 pm
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Default Re: more heater issues

Good advice!

The waterpump is just a centrifugal pump, it's very, very difficult to make it not pump. (I do understand turbo models have plastic impellers, so this doesn't apply to those)
I'd guess you conducted the flow observation at idle, if you blipped the throttle you'd have a different story!

Change out coolant, give the core a good backflush as Soy suggested, and see if there's heat
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