Probably not worth the effort. If other good engines can still be found in your region at reasonable prices. I said probably as you have no solid indication of what the actual reason is. I would still try to start it. See what the compression numbers where like after it ran awhile.

It had not run for a long time so look hard for past vegetable oil use in the craze. If it was a past veggie engine I would pass it by. A veggie diet may be good for people. Not as often for these engines. The rings could be glued solidly in the lands with sitting.

Good news I got the engine running today still in the car and it sounded great I did'nt run it higher then idle about 45 seconds as had no radiator on it. I was so happy with the sound of it but the compression numbers have to be dealt with so I guess with the replies is I should try to determine where the leaks are. Can I make a fitting out of an old glow plug or can I purchase a fitting to put some air in the cyl. I will hook up a radiator and run the engine to operating temp. and take some more compression readings and maybe run about 4 qts. of marvel mystery in it to loosen up the rings if they are stuck fast. I will probably not get much done on it tomorrow as I have to put a radiator on a sprinter but will report back on how this progresses and if I can get those compression numbers to read a little higher.

Try to adapt something from the compression tester.

Are you putting the MMO in the cylinders or the crankcase? Due to gravity it would be more effective in the cylinders in which case a couple of ounces in each is sufficient. Four quarts is too much unless in crankcase, two quarts added to oil would probably be enough.

Glad to hear you got it running.

Good luck!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Two early for a compression test again. Needs some running. The expansion and contraction help with repeated cycles. Ability to start alone means probably no vegie oil use.

Should probably change the oil. As you will probably not be getting it hot enough to boil off condensation. Plus it is old and oxidized Oil. Some miracle oil in the base oil will help perhaps as well.

If it was able to idle reasonably well your initial compression numbers were wrong. Or some stuff cleared of the valve seats very fast. Perhaps the valve stems where sticking in the guides a little. Does not really matter as it now has a chance. With those numbers if it did not take a pull start to get it running. It to me is pretty amazing. Plus makes the first compression readings suspect.

Oft repeated folklore. Whereas it is true that engines run on WVO without the recommended precautions and provisions can suffer damage mid to long term it is simply false to cast blanket aspersions on WVO as a fuel.

While it is wise to avoid such engines if you don't know their history (how the WVO was run) as is the case with the OP, the number of well documented cases of engines run without issues into the 6 digits puts the lie to those WVO put downs.

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'83 SD, 2x '85 SD
You are entitled to your own opinions, you are not entitled to your own facts.

What people burn for fuel in their engines is their choice. It is their vehicle.


At he same time the vast majority during the craze. That burnt used vegetable oils. Took these engines and or injector pumps into pretty terminal conditions.


The percentage that did all the work to use it properly I suspect where the exception. Not the general rule unfortunately.