Posted by John Duprey on Monday, June 24, 2002 at 9:08AM :
Hi All: Having a bit of trouble with my oil pressure on my M-37 I installed a NOS oil pump last year and has been working fine. Yesterday was a hot day I started the rig up was getting 40 pounds at idle 50ish at 30mph (Normal for me) after about ten minutes I was down to 20 at idle and 25ish at 30mph. After the truck cooled down pressures were back up for the first 10 minutes or so then they went back down again. Running 30wt oil. What do you think is it a bum pump or do i need to run a heavier oil??? Need to be running OK. for a Forth Parade.
Thanks
John
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