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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: sbx22 on March 21, 2017, 08:01:23 am

Title: heater hoses routing
Post by: sbx22 on March 21, 2017, 08:01:23 am

Never thought about it much but I am in the process of replacing heater core. Anyway, doing some research reveals that I have the hoses routed all wrong (well, it came like this from previous owner). I have coolant coming from top of water pump to heater core, then from heater core to radiator. Can someone confirm to me whether this is right or not? The vast majority of my research says coolant should come from intake manifold. Thanks.

Title: Re: heater hoses routing
Post by: VileZambonie on March 21, 2017, 08:14:21 am

Correct, you are running a bypass loop. You need to come out of the intake and either the WP or radiator. It looks a little cleaner going to the radiator and you can easily plug the waterpump port.

Title: Re: heater hoses routing
Post by: VileZambonie on March 21, 2017, 08:23:09 am

See pic

Title: Re: heater hoses routing
Post by: sbx22 on March 21, 2017, 08:05:33 pm

Thanks vile for the confirmation.