I believe there was something preventing a valve from closing fully.
I tow started the 720 again to get it to the mechanic's for a compression test.
Ran it for a while then opened the oil fill cap and there was lots less air pressure in the valve/rocker cover.
Had the compression test done and all 4 cylinders are 400psi. Not bad for a 1985 model.
Turns out that when I ordered the new glow plugs recently I was given ones for the SD23 in a Nissan Urvan not the 720.
Different voltage they were not heating up enough.
And one had failed already missing the very tip.
It now starts and runs perfectly.
blow by cured.
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I suspect that the missing glow plug tip may have got itself lodged under one of the valves and caused your blow-by issue
Hopefully it was the exhaust valve that it was lodged under and has gone out the tail pipe now.
You have a 50/50 chance that it was
P
Hopefully it was the exhaust valve that it was lodged under and has gone out the tail pipe now.
You have a 50/50 chance that it was
P
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
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