slownrusty Posted May 30, 2004 Share Posted May 30, 2004 Just like me when I turned 30, my oil pump lost its PRIME. Seriously though, I removed my oil pan (this is on a 4AG engine on a 1985 Toyota Corolla GT-S, with a oil pump driven off the crank) to weld in a new bung for my oil temp guage. I removed the oil pan with the engine still in the car and had to remove the oil pick-up to be able to slide the pan out from under the block. Well I got everything back together and made 101% sure that there was no excess silicone on the oil pan and also on the pick-up and everything was whistle clean as well and I kept cranking the engine (with the coil wire off) and the oil pump is not building any pressure whatsoever. I cranked for ages as well! I confirmed this by disconnecting one of the lines to my oil cooler and it was bone dry and as I cranked no oil came out of the open end. So I am stumped and figure that since I removed the pickup, and the car sat for over a week, that the oil pump lost its prime. I am unsure as how to "re-prime" the pump. The only thing I can think of doing is to buy an RV 12V pump (30-50psi) and assemble the outlet with fittings to feed into the oil gallery where the stock oil pressure sensor is threaded into. BTW my oil pump is new.. Can anyone help!!?? Please don't say I have to buy an Accsump!! Thanks In advance- Yasin Quote Link to comment Share on other sites More sharing options...
yo2001 Posted May 30, 2004 Share Posted May 30, 2004 packing grease in the oil pump gear does the trick on 4G63. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted May 30, 2004 Share Posted May 30, 2004 That also works for the 22RE. I used vaseline. Quote Link to comment Share on other sites More sharing options...
technicalninja Posted May 30, 2004 Share Posted May 30, 2004 As the engine is already assembled try this. Remove oilfilter and use a "squirt can" to feed oil into the outer port of the filter housing while a helper turns engine backwards. It is possible to actually see the oil being pulled into the pump and I have used this trick many times. The 231 Buicks of the mid eighties had an extreme issue with losing pump prime and this method worked great. I would run 1/2 quart into engine this way before trying a start. Removing spark plugs may reduce wear on helper turning crank but is not a requirement. Rick Quote Link to comment Share on other sites More sharing options...
technicalninja Posted May 30, 2004 Share Posted May 30, 2004 Another point- If the oilpump pick up is not well sealed to its mounting boss then a air leak can form causing no oil to be picked up. Are you totally sure it sealed well? The process I mentioned in last post will not overcome a leak in the pick up tube. Rick Quote Link to comment Share on other sites More sharing options...
slownrusty Posted May 30, 2004 Author Share Posted May 30, 2004 Thanks for the great help guys. I know now why, I am member on here, your quick help and assistance is a true life saver! I posted this same question on another forum and I am getting replies like...."did you add oil to the engine??"....UG! Anyway....I pulled the oil filter off the block and using my hand pump I forced oil back towards the pump, I also pulled off my oil cooler and all the lines, to reduce the complication of the situation and putting less stress on the pump as well. Well after I used my hand pump and squirted oil back towards the pump, I jumped in the car crossed all ten fingers and ten toes and started cranking...well....the first time in 3 days the oil gauge moved...very shakily but it got to just under 10psi and then fell down flat back on its face right on the peg and would not budge....DRAT!! So I am pulled the oil pan off again (a major ordeal!!) and the pickup and I am going to use my grease gun and pack some grease between the gears and maually crank the engine with a breaker bar and socket, that way the grease would be distributed between the gears and I think that should be the trick....wish me luck. Rick - I only thought about turning the engine backwards in collaboration with the hand pump after I had pulled the oil pan off, and I was kicking myself in the backside for not trying that at the same time - totally makes sense. The pick-up is perfectly sealed as well...I even put the lightest smear of silicone on it to ensure that as well. I drained out my oil and there are no bubbles so I know the pickup is not drawing any air. I have removed the spark plugs as well, trying to minimize wear. Hope to report with good news later tonight or tomorrow a.m! Wish me luck!! and thanks again - Yasin Quote Link to comment Share on other sites More sharing options...
slownrusty Posted May 31, 2004 Author Share Posted May 31, 2004 Well I got my oil pump working....I am getting a solid 60psi of pressure. The trick was to pack the oil pump with grease, which is what I did, on the second set of cranks after packing the oil pump with grease..BAM!!!....10psi....20psi...30psi....onto 60psi. I just pulled the pick-up out and inserted my grease gun into the hole at the bottom of the oil pump (which fit perfectly), I did this until grease came out, then I cranked the engine over by hand using a breaker bar and 19mm socket and I could see the grease getting sucked in, meaning that it was between the oil pump gears. I then squeezed in a little more grease for good measure. After that I re-installed my pick-up, oil pan and plate and I was good to go. Wow...I worked another 12hours on the car today, that makes 36hours since Friday! I tell you this caris my equivalent to Eleanor in Gone in 60seconds!! Regards - Yasin Quote Link to comment Share on other sites More sharing options...
Guest BADAZZ240GN Posted June 29, 2004 Share Posted June 29, 2004 my wife says try suck starting it ... it usually works when my pumps loses its prime... sorry bout that i couldn't help it.. Quote Link to comment Share on other sites More sharing options...
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