2nd Generation Specific 1986-1992 Discussion

Cooling System Re-Route Advice

Old 03-22-2006, 11:59 AM
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Well, I broke the threads that connect my thermostat neck piece, and replaced the whole unit last night with one off a NA because it was just laying around, I didnt notice the NA one didnt have a turbo water return fitting. I am thinking about just T-ing into the heater line when it comes off the bottom of the radiator and jumping in there, but I figure the idea of the water return hitting the pump is for the water to go up to the radiator because its hot water, I dont think this will affect temps much, but I wanted to see what you guys thought.





So its a S4 NA water pump assembly on a S4 Turbo II...where to dump the turbo water return is the question.
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Old 03-22-2006, 12:20 PM
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There is a Cast "boss" on the NA Housing, Drill and tap this with a 3/8" NPT (?) tep and tread in a barbed fitting, VIOLA~ instant water return
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Old 03-22-2006, 12:39 PM
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A cast boss? I dunno what that means. Or where that would be? or what a boss is. But I will look on it..



Thanks
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Old 03-22-2006, 01:14 PM
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Also, is it possible to just block off the coolant line on the back of the engine and then route the turbo water in thru the back of the water neck.
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Old 03-22-2006, 09:52 PM
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I forsee we are going to have to do a lot of work.......
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Old 03-23-2006, 10:11 AM
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Originally Posted by 1Revvin7' post='809449' date='Mar 22 2006, 07:52 PM

I forsee we are going to have to do a lot of work.......


yep, you're gonna have a bunch of little things to straighten out
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Old 03-23-2006, 10:59 AM
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You can return coolant back through the heater core return line.

Kind of a hack, but, "Get R dun" for now.
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Old 03-23-2006, 11:13 AM
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i'll have to post a pic for you.
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Old 03-23-2006, 12:16 PM
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Damn you mike, change your avatar picture lol
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Old 03-23-2006, 02:13 PM
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Well I have it T'd into the line that goes from the back of my engine to the coolant filler neck back area, then low and behold the son of a bitch started leaking under the alternator........son of a bitch car...
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