Heater hose Routing

[blyth]

I was wondering if anyone knows or can give me a pic of the heater hose routing in a 97 seville sts. I need to install a heater hose coolant heater because my block heater alone is not enough and you can get these at 1000W. So if anybody knows where I should tie into the lines or has a good pic of the routing it would be greatly appreciated


i was thinking I could tie into the line where it comes off the water pump with the lower rad hose and then have the return line hook back up to the steel line right there. The problem with this is it would be drawing thru the water pump and returning thru the heater core

[submariner409]

The heater hose routing makes it very near impossible to get an inline heater in the correct place for convection to circulate any coolant. The "lower hose" suffers the same problem in that no coolant circulates. If a 500W or 1000W heater won't heat your coolant, damn near anywhere on Earth, more Watts won't help. (The N* engine cooling system is designed to circulate practically zero coolant until the thermostat begins to open, hence the relatively rapid warmup rate. There is no water pump outlet bypass as is more common. The pump moves nothing through the engine until the thermostat opens.)

Therefore the proposed fix which was a reply to your original posts of a couple of weeks ago: Use the OEM Calrod elements which bolt to the block sides at the bottom of the water jacket.

[blyth]

500W is not that much the car has a 600W block heater from the factory but I cant put a new oem block heater in I cant even get to the damn thing without dismantling half the engine as is I can only get one finger to even touch when i am underneath the car and reach thru the drivers side suspension. If i take the exhaust off after the manifold I think it might give me more room but that is getting to be alot of work and I suspect the original is still taking power because it sparks when I plug it in. Is there a frost plug in the front side of the engine that I could put a second oem thermostat in then, because then I know it should start because with one it wont even start at -25C

Where does the return from the heater core enter the engine, because it looks like it goes down and enters at the back side of the engine

I am seriously thinking about selling this car, I thought cadillac made a better product than this.

[submariner409]

blyth, There's a post in here within the past few days which concerns replacing the heater hose and quick connect fitting located in the rear side of the block toward the transmission end. Maybe one of the diagrams in there would help.

I am under the impression that you did not have the OEM heaters because your original post considered them too expensive and you asked about in-line coolant heaters.

I doubt there's a freeze plug element for a N*. Query dkozloski on extreme cold problems with a N*. Of anyone in here, he should know.

[blyth]

yes there is a freeze plug element that is what is put in from factory my car has one and is either not working or just not powerful enough to warm the engine

[submariner409]

OK, once again we're into different engines, because the '02 FSM shows Calrod block heaters bolted to the block on both sides.

I should have stayed out of this from the get-go.

Shows why there is so much misinformation in here: If you have a "Seville" or "N*", chances are that your problems and fixes are totally different from another's due to model year differences, and practically nobody bothers to find out the differences before starting Vast Projects with Half Vast Ideas..........

[blyth]

ya mine a 97