Check valve to prevent oil filter and cooler drainback

[JasonS]

There was some mention made in this forum about the tractor version of the multifuel having a check valve to prevent the oil cooler and filters from draining out into the pan. Fast forward to 1:45 here to see how it is done:

It looks like we would have to add a counterbore and tractor engine oil regulator to make this work on the multifuel.

For what it's worth, I don't find the spin on filter adapters to reliably reduce time to oil pressure; looks like White motors didn't, either.

 

[Menaces Nemesis]

FWIW, I too had problems with lag to build pressure with the spin-ons... Found that a bad oil pressure regulator assembly was allowing pressure spikes that were damaging/blowing out the anti-drainback valves in the filters. Replaced the bad pressure regulator, and now I get consistent cold-start rapid pressure build within 5 seconds. I wrote about it here...
https://www.steelsoldiers.com/threads/oil-pressure-regulator-spin-on-filters-problem-solved.189649/