Just finished my turbo build. Fired the car up for the first time, kept feeding it coolant as it warmed up. Finally I put the cap on the rad. Checking everything I looked under the car and there is coolant seeping down the back of the block/bellhousing. The negative thinker in me immediately assumed blown headgasket but I'm not 100% sure that a brand new head gasket would blow at idle (unless something was terribly wrong). Temp never went past 220ish and was up there briefly before I fed it more coolant What else runs around back there that could be doing this? Coolant crossover pipes maybe?

 

Those seals on the crossover pipes don't like to be reused sometimes. I'd say it's either that or the head bolt holes weren't clean and dry when you torqued the heads and the block is cracked.

 

I did the proper cleaning method for each thread hole and made sure each hole was dry but I guess you can't count it out

 

Each head has a hole drilled for the temp sensor. Passenger side you probably stuck a bolt in there or something. Is it leaking there?

 

You mean the one by the exhaust ports? Yeah that one has a bung in it

 

This is coming from somewhere in the back of the motor, its running down the bellhousing/oil filter. I'm gonna pull the intake tomorrow and see what we got

 

Like KCS said check your crossover pipe in the rear.

 

What was the leak?