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Hi guys, I'd like to add my views on the TD42 cooling issues.
I'm a diesel fitter & there's very little I don't know about these great engines.
I built my own engine for my 03 GU wagon. It pumps out 200rwhp running 20psi boost.
Every component in the cooking system is new, including a 3 row radiator & a trod on high flow thermostat.
I fitted the water pump with no gasket to minimize clearance for cavitation.
I towed my camper trailer to Victoria this Christmas. It was a 40 degree day down the Hume & mine truck got hot. It had never overheated with the ZD30 engine fitted.
As soon as I backed off it would cool back down.
This was happening with exhaust temps only at 450.
I did lots of thinking & came to the conclusion that it's combustion temp in the head, rather than an inefficient cooling system that causes this widespread problem.
Not enough coolant circulates through the ferrules in the head.
I removed the head & tapped a 3/8npt thread in the rear into the water jacket between the welsh plugs.
I fitted a 5/8 barbed elbow & ran a hose straight to the header tank.
Once I started her I could instantly see an increase in flow through the header tank.
I hooked up my 2 ton boat & hit a big hill. Egt 550 & temp didn't rise.
Problem fixed.
I know it's a pain in the ass but an overheating system reduces engine life so it's well worth the effort.
I hope this might give y'all some ideas.
The Following 6 Users Say Thank You to Velty For This Useful Post:
Ade (2nd February 2014), growler2058 (7th January 2014), GU442Ti (24th October 2017), katwoman (31st March 2017), MB TD42 (31st January 2018), Touses (17th January 2018)
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