Thread: Yet more turbo questions!

A couple of the turbo setups I looked over at the Castle Hill expo had the heater lines Teed to feed the water cooling on the turbo. Can anybody see any reason why the return from the heater core couldn't be diverted through the turbo cooling gallery before returning to the motor, aside from the possible reduction in flow through the heater core causing a problem?

Originally Posted by jackz

A couple of the turbo setups I looked over at the Castle Hill expo had the heater lines Teed to feed the water cooling on the turbo. Can anybody see any reason why the return from the heater core couldn't be diverted through the turbo cooling gallery before returning to the motor, aside from the possible reduction in flow through the heater core causing a problem?

Water cooling diesel turbos is un-necessary. But if you want to do it, you need to hook the lines up so they can thermo-siphon once the engine has shut-down. That is so hot water can rise to a higher pipe and continue on out.

If you don't, then the turbo will boil the water on hot shut down, vapour lock and get severe thermal shock if the engine is restarted soon after.

Originally Posted by Dougal

Water cooling diesel turbos is un-necessary. But if you want to do it, you need to hook the lines up so they can thermo-siphon once the engine has shut-down. That is so hot water can rise to a higher pipe and continue on out.

If you don't, then the turbo will boil the water on hot shut down, vapour lock and get severe thermal shock if the engine is restarted soon after.

I water cooled mine when it was first installed in the Rangie, then removed it when changing it all over to the 110 as it is not required like Dougal says. Also introduces just one more place a water leak can develop....


JC

Spent a few hours in the shed today, working on a manifold to turbo adapter. No namby-pamby, girly blouse profile cutting here, just good old hack-sawing and stitch drilling on the mighty aldi drill press. Though I might cave in and use the angle grinder to finish the outside profile later.

turbo adapter resize.jpg

I always thought water cooled for ball bearing turbos petrol or diesel
My engine had dedicated cooling lines so used them with the new turbo

AM

Originally Posted by Ancient Mariner

I always thought water cooled for ball bearing turbos petrol or diesel
My engine had dedicated cooling lines so used them with the new turbo

AM

True. But comparatively few run BB turbos on diesels. Can't wait to hear how your one goes.

Originally Posted by Dougal

True. But comparatively few run BB turbos on diesels. Can't wait to hear how your one goes.

Why don't people run ball bearing turbos on diesels?

Originally Posted by *RR*

Why don't people run ball bearing turbos on diesels?

Most ball bearing turbos are intended for the ricer aftermarket and aren't a good fit airflow wise for diesel engines.
Journal bearings are also more robust and suit the usage of diesel engines better.