Ed Simser Posted September 4, 2020 Share Posted September 4, 2020 Experiencing oil low pressure on the 673 engine. It may be bearing wear but before I rebuild I am going to drop the base and check the oil pump. Anyone replaced one lately? If so do you have a source for purchase and part number? Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/ Share on other sites More sharing options...
terry Posted September 4, 2020 Share Posted September 4, 2020 2 hours ago, Ed Simser said: Experiencing oil low pressure on the 673 engine. It may be bearing wear but before I rebuild I am going to drop the base and check the oil pump. Anyone replaced one lately? If so do you have a source for purchase and part number? Thanks. A sudden loss or gradual? terry Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460125 Share on other sites More sharing options...
Ed Simser Posted September 4, 2020 Author Share Posted September 4, 2020 Just bought the truck two months ago. Former owner had not changed the oil in a long time. Had to scoop the sledge out of the Luberfiner. Changed the oil and filters. Put 15-40 in it. Noted that cold the pressure was acceptable- hot it was not good Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460141 Share on other sites More sharing options...
Ed Simser Posted September 4, 2020 Author Share Posted September 4, 2020 2 Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460142 Share on other sites More sharing options...
davehummell Posted September 4, 2020 Share Posted September 4, 2020 Did you drop the round cover on the oil pan it gets loaded up with sludge? Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460147 Share on other sites More sharing options...
Ed Simser Posted September 4, 2020 Author Share Posted September 4, 2020 I didn’t but that sounds like a good place to start and besides the pump is right there too. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460154 Share on other sites More sharing options...
HarryS Posted September 4, 2020 Share Posted September 4, 2020 That is almost criminal to let a beautiful truck like that sledge up so bad. What are your readings (hot at idle and rpm)? Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460155 Share on other sites More sharing options...
Ed Simser Posted September 4, 2020 Author Share Posted September 4, 2020 Thanks Harry !! Yes it is a beautiful B 61. The former owner owned a body shop but he was lacking in maintenance prevention!! When it is cold readings are 45 pounds at 1500 rpm. 25 at 600 rpm. Hot, 160 degrees readings are 25 at 1500 and 7 pounds at 600 rpm. Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460156 Share on other sites More sharing options...
HarryS Posted September 5, 2020 Share Posted September 5, 2020 Mine is a 673 n/a and the readings are just about the same cold and the hot readings are 12 at idle and about 30 at rpm. I've had the valve covers and side covers off and things are fairly clean. I change oil and filter each year and don't use any oil. Maybe leak a little. The truck leads a life of leisure at about 2K miles per year. Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460167 Share on other sites More sharing options...
Ed Simser Posted September 5, 2020 Author Share Posted September 5, 2020 Thanks Harry. Appreciate the input. Quote Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460176 Share on other sites More sharing options...
doubleclutchinweasel Posted September 9, 2020 Share Posted September 9, 2020 Did you ever get any farther on this? Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/64026-oil-pump-673-engine/#findComment-460481 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.