ALERT :~ 75/ZT 1.8T Turbocharger CHRA Coolant Supply Drain Union discrepancies

Abott10 · 3rd November 2017, 20:21

Over the past few years, I have rebuilt a few worn MG ZT 1.8T Turbochargers using CHRA units.

My very recent daily driver 55-Reg MG-ZT-T 1.8T was blowing clouds of blue smoke out of the exhaust. A sure sign of a worn turbocharger. No problem really so I will rebuild a spare worn Turbocharger using a new CHRA I had on the shelf. All went well with the rebuild until the time came to screw in the Coolant Supply and Drain Union Stubs. No way would they fit because their threaded locations on the new CHRA were drilled a couple of Millimetres too small. What to do?

Took the CHRA and the Coolant Union Stubs to a helpful small engineering firm I have used for small tasks in the past.

They reduced the diameter of the Union Stubs. Plenty of material to enable that to be done effectively with no risk of a weakened components. Plenty of material available on the stubs.

Lovel · 3rd November 2017, 20:51

You want one of these for that little jobs. Well done for reporting it anyway.

olliesgrandad · 3rd November 2017, 21:21

Quote:

Originally Posted by Lovel

You want one of these for that little jobs. Well done for reporting it anyway.

A bit cleaner and possibly younger than mine

marinabrian · 3rd November 2017, 21:32

Quote:

Originally Posted by olliesgrandad

A bit cleaner and possibly younger than mine

Myford Super 7.........nah give me a Colchester 2000 with Norton gearbox any day

I must get my workshop built, instead of having the lathe buried at the back of my garage

Brian

Mike Noc · 3rd November 2017, 21:46

Ah the old Colchester - back in the day used them in just about every workshop we worked in.

3rd November 2017, 20:21	#1
Abott10 * Join Date: Apr 2014 Posts: 227 Thanks: 1,275 Thanked 1,917 Times in 1,328 Posts	ALERT :~ 75/ZT 1.8T Turbocharger CHRA Coolant Supply Drain Union discrepancies Over the past few years, I have rebuilt a few worn MG ZT 1.8T Turbochargers using CHRA units. My very recent daily driver 55-Reg MG-ZT-T 1.8T was blowing clouds of blue smoke out of the exhaust. A sure sign of a worn turbocharger. No problem really so I will rebuild a spare worn Turbocharger using a new CHRA I had on the shelf. All went well with the rebuild until the time came to screw in the Coolant Supply and Drain Union Stubs. No way would they fit because their threaded locations on the new CHRA were drilled a couple of Millimetres too small. What to do? Took the CHRA and the Coolant Union Stubs to a helpful small engineering firm I have used for small tasks in the past. They reduced the diameter of the Union Stubs. Plenty of material to enable that to be done effectively with no risk of a weakened components. Plenty of material available on the stubs. Last edited by Abott10; 3rd November 2017 at 20:42..

3rd November 2017, 21:46	#5
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,548 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Ah the old Colchester - back in the day used them in just about every workshop we worked in.