2g head 1g block coolant line help

[dans95dsm]

need help on where to put the coolant lines from a 16g the block is a 1g 6bolt, head is off my old 2g.I don't know where to put the yellow and red, the light blue and green is the oil cooler, but where do I put the upper left green as well.(yellow are stainless steel lines that came with an install kit.

 

[Dsmkauai]

I believe red top goes to yellow behind and red bottom to yellow front. I simple motor diagram will show u. What water pipe are you using? Normally the feed is on that on a 2g.

 

[dans95dsm]

Ok I got the yellows, but what about the upper left green that leads to the oil cooler where does that one go.

 

[Dsmkauai]

That's your problem you need the 2g water line for the coolant feed to turbo. Then you can use the upper red to feed the green. There's no other ports you see?

 

[19Eclipse90]

How it's supposed to go:

• Top red to green. This is the oil cooler feed; it returns to the water pipe.
  
• Lower red to front yellow. This is the turbo coolant return; it always returns to the water pipe.

What's missing:

• Turbo coolant feed port to rear yellow. This, on a 2G comes from the block; on a 1G, it comes from the thermostat housing.

As stated, there simply isn't enough ports to plumb everything up as it came from the factory. This is a common issue when reusing the 2G thermostat housing / water pipe with a 2G head on a 1G block.

There is the option to not run coolant to the turbo, but then there is one excess port that would need to be blocked off.

 

[dans95dsm]

What will I need to get, or do. Can I T one of the red lines to the rear yellow.

 

[1990TSIAWDTALON]

I run a 1G housing on my 2g head/1g block setup.

 

[19Eclipse90]

Options are pretty straightforward.

• Go complete 1G setup, as Marty mentions above (thermostat housing and water pipe)
• Run no coolant to the turbo and plug the lower red line on the water pipe; this will use the upper red to feed the water cooler and light blue to return from the water cooler
• Run no coolant to the oil cooler and plug the light blue at the water pipe; this will use the upper red to feed the turbo (to rear yellow) and the lower red to return coolant from the turbo (from front yellow)
• Run coolant to everything and find another source for a feed or use a T at the oil cooler coolant feed

Completely up to you.

 

[dans95dsm]

I think I'll go with the last option, can I T one of the yellow at the light blue.

 

[19Eclipse90]

And by doing so, trying to accomplish what, exactly?

There is already an excess of return ports; the light blue line is a return port so putting a T there doesn't do anything to help. I guess I should have mentioned the oil cooler coolant feed is the upper red.

 

[dans95dsm]

Oh so I can safely T it off there for the rear yellow line

 

[19Eclipse90]

Sure. You may not reap the extent of whatever small amount of benefit you'd get out of having a dedicated feed, but it won't hurt anything.

 

[dans95dsm]

thanks now i can continue on my build.