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Engine Specific Info and Questions => IDI Engine => Topic started by: holoffs on January 13, 2011, 11:30:04 am

Title: coolant lines
Post by: holoffs on January 13, 2011, 11:30:04 am

I am installing a fuel heater in my 1985 1.6 turbo diesel Jetta. I plan on splicing into the oil cooler coolant lines and was wondering which one is supply and which one is return? The car is not running now and I have no coolant in the system. 

Title: Re: coolant lines
Post by: R.O.R-2.0 on January 13, 2011, 11:32:39 am

the line that comes off it and enters the middle nipple on the water pump is suction..

does it really matter what way the coolant is flowing tho? as long as there is, in fact, flow?

Title: Re: coolant lines
Post by: holoffs on January 13, 2011, 12:20:41 pm

Not really but oil cooler out coolant line would be hotter.

Title: Re: coolant lines
Post by: R.O.R-2.0 on January 13, 2011, 12:22:53 pm

hottest line coming off the engine would be the supply to the heater core..

Title: Re: coolant lines
Post by: holoffs on January 13, 2011, 12:37:39 pm

Is that the line that comes off the end of the cyl. head?

Title: Re: coolant lines
Post by: R.O.R-2.0 on January 14, 2011, 09:54:49 am

yes.