Turbo Coolant Feed P90 head

[Coops]

Was planning to feed coolant to the turbo using a branch from the heater feed like the original SU manifold coolant route but getting 3/4" braided hose down to a 5"8 barb and -6AN looks nasty.

 

Then noticed the unused thermistor fitting hole  between cylinder 5 and 6 in the P90 head.

 

Any opinions on using this as the turbo coolant feed?

 

[nizm0zed]

Is that a coolant hole between the oil filter and that welch plug?

 

What way does the coolant flow at that point in the motor? (or from the port on the head)

You dont want the coolant flowing from the turbo and into the head, it'll just make the overheating issue worse.

[Zedman240®]

Isnt that hole for the knock sensor to mount into?

[Coops]

Yes that's the original knock sensor position between the oil filter and the welch plug. 

 

From looking at a workshop manual, flow goes across the head towards the manifolds.  I'm unsure what effect it would have on the surrounding cylinders if I pull water from there.

[peter mc]

dont take water from the head its already to hot lol  take the water from to lower water outlet on the block then feed the hot water to the bottom of the thermostat

[Coops]

Unable to use the block drain as the exhaust header blocks access. Can't feed by tapping between cylinders 5  and 6 on the manifold side either as inlet won't allow it.  Outlet is going to thermo housing.

[peter mc]

you really don't want to remove the water from the head to cool the turbo ,  but if you have to remove it from the plug side as the water is cooler ,