Here's what I did on my 2.4 quad4 Gasser Oldsmobile (water pump was driven of the timing chain, weep hole drained to the oil pan when the WP let go) I had...

After reassembly, drain oil, change filter, filled with fresh oil and Beryman's B-12, since it emulsifies the oil and water, let idle 15 min after reaching operating temp. Drain oil, change filter again, refill with fresh oil again.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

You saw no sign of the head gasket being bad when you removed the head? I had a leak in a head gasket on my daughters 78 240. You could see bubbles coming out between block and head above where the old style GPs ground. I couldn't see any tell tale signs on the top of the block, head or gasket. I'm kinda new at this but I figured you'd see some evidence. Hopefully this is the case with yours, good luck.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"