The re-calibrated new pump is back in and the it idles fine. When its warm at speed it acts like it is running on 5 cylinders. When checked by cracking each line there is no change in the idle at the #5 cylinder. The Compression test was excellent but this was done when the engine was cold. I requested that they keep the car one more day, get it up to operating temperature and then do a compression test on cylinder #5.

At this point I don't know what else to do apart from start preparing the #17 head that I have in the event that the #5 has a crack in the head there.

There is no oil in the radiator and no coolant in the oil.

Ideas??

Is it safe to drive it like this till I prepare the new head? Or could there be further damage if I do drive it?

Thanks
Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor