Quote:
Originally Posted by vwnate1
What I meant was : the 300 had the head issues and the 350 was the rod bender .
We drove my Brother's '87 OM603 from Coast to Coast in August with the original head, (#14 IIRC) , it ran hot going up hills with the AC on and used a steady flow of coolant , in Maine I was fiddling with it and discovered red RTV blocking the small radiator to surge tank hose when I replaced it because I noticed cracks in the rubber .
The car never seriously over heated, we'd just turn off the AC whenever the gauge passed 2/3 .
I have also seen quite a few that still run the original heads, some sort of casting shift or defect I imagine is the issue .
|
Right. 3.0L was head issues, 3.5L was rod-bending (in addition to other questionable design decisions).
The turbo 603 can run up ~100-105˚ on the temp gauge when pulling up hills with the A/C on and still be considered "normal" so long as the temp goes back down when the load reduces. Replacing the fan/clutch with the turbo 606 fan/clutch seems to be a good upgrade. Colder A/C and a cooler engine, I've yet to see mine get above 90˚, even when floored up some of the long steep hills around here.