new head gasket and sending unit..still have oil pressure gauge issue
oil pressure gauge was dropping to zero after slowing down to a stop at a stop sign or intersection, etc. check gauges light came on at that time. replaced oil sending unit (twice). was also loosing coolant.
found out i had a leaking head gasket. replaced that and all that implies. drove it for the first time in 3 weeks (other than around the neighborhood last night) this morning to work. all was fine on the drive down the highway. when i exited and approached the intersection in front of work, the oil pressure gauge needle dropped to zero and the check gauges light came on. what else is there that i can do or check. it is getting pretty irritating, but i don't want to blow anything up...other than my jeep if it doesn't start cooperating soon.
after it cooled, i went outside to check the fluids (which had just been topped off last night). the oil looks good...color and level. the coolant level had dropped some. no drips or puddles that i could see. it was still on top of the core, but not in the fill neck like it was last night after filling. i topped it off and it took a decent amount to do so. we'll see if it lowers again. i would like to think it was just a matter of air bubbles working their way out, but i am not so optomistic.
is there something i am missing here. new hoses, new gaskets...thermostat, waterpump, cylinder head, machined head, resealed valves, new oil sending unit.
If you are still experiencing oil pressure problems, then I would suggest changing the oil pump and pick up screen. I'm sure the expresso latte is clumped up on your pick up screen following the leaky head gasket incident you posted a while back.
IMHO - purging the cooling system will not fix this problem.
How much did they get you to clean and prep the head?
I'm having the exact problem with the oil pressure dropping to zero at a stop and when i idle out of a gear. I changed the oil and thought that did it but it happened again this morning. How would i find out where the oil pressure sensor is? also to change the screen and pump do you just have to take off the oil pan?
have not replaced the oil pressure sensor. just the oil sending unit...twice.
flowmaster40,hpd30 with aussie locker,currie upper joints,4.88's, lca skids,chromo shafts,vanco brakes,d35 with super 35 and arb locker,re 4.5" springs,currie arms,re front uppers,Re shocks in back,walkerevens shocks up front, Re track bars with currie jj joints,anti rock,ss brake lines,re rear sway bar links,jks 1.25" bl and mml,bfg 35x12.5 km2's,craiger soft 8's,ome steering stabilizer,currie hd steering,rockmen front bumper,emp tank skid,lots more too.
haven't been on here in a while and i have actually since sold the TJ. it ended up that it had a cracked block.
the guy that bought it had the complete drivetrain out of an 05 TJ....4.0L, 5spd, driveshafts, etc.