A
Anonymous
Guest
can any one clarify how the oiling system works and why i had the the following symptoms.
i had changed to a bosch high performance filter last weekend along with a change to 15w40 mobil1. this was right after i changed the oil pump, cleaned out the pan and installed new rod bearings. the oil pressure was improved to a good state but during the week about 250 miles the oil pressure has started to sag. i was concerned but not alarmed. sunday we took the car up the hill from san bernardino to running springs. at the top i noticed my oil pressure was down to about 10psi at idle and about12-12 psi at speed. now i was concerned. i changed the oil before going any further. i could only get penzoil 10w40 and coudnt get a new filter. within a few minutes my oil pressure was at about 6psi at idle and at speed thre needle wouldnt move. i suspected the guage. i didnt hear any rod knocking!!!
we drove the 30 miles home at 6psi indicated. at home i slapped on a known guage and was getting also 6psi.
the culprit seemed to be the filter. i changed to a fram P8HA and rechanged the oil to durablend 20w50. everythinmg seems back to normal at 30psi hot cruising and 18psi hot idle.
i can only guess the bosch filter was a fine micron filter and loaded up quickly from the dirt shaken loose by the engine work and or synthetic oil??? Does this make any sense.
I read esewhere that some recommend the motorcraft filter. Is it better?
Lastly dont the oil filter have a bypass to prevent starvation?
Thanks Frankie
i had changed to a bosch high performance filter last weekend along with a change to 15w40 mobil1. this was right after i changed the oil pump, cleaned out the pan and installed new rod bearings. the oil pressure was improved to a good state but during the week about 250 miles the oil pressure has started to sag. i was concerned but not alarmed. sunday we took the car up the hill from san bernardino to running springs. at the top i noticed my oil pressure was down to about 10psi at idle and about12-12 psi at speed. now i was concerned. i changed the oil before going any further. i could only get penzoil 10w40 and coudnt get a new filter. within a few minutes my oil pressure was at about 6psi at idle and at speed thre needle wouldnt move. i suspected the guage. i didnt hear any rod knocking!!!
we drove the 30 miles home at 6psi indicated. at home i slapped on a known guage and was getting also 6psi.
the culprit seemed to be the filter. i changed to a fram P8HA and rechanged the oil to durablend 20w50. everythinmg seems back to normal at 30psi hot cruising and 18psi hot idle.
i can only guess the bosch filter was a fine micron filter and loaded up quickly from the dirt shaken loose by the engine work and or synthetic oil??? Does this make any sense.
I read esewhere that some recommend the motorcraft filter. Is it better?
Lastly dont the oil filter have a bypass to prevent starvation?
Thanks Frankie