[williamb82]

christian, whats this about putting a washer in the pump to raise the oil pressure? im interested in that as im about to start on a new 7mgte for my 84. im going with forged pistons and race prepped rods. i will be buying a new 5m oil pump and would like to modify it to run ~10psi oil pressure at idle if its possible. i remeber someone saying you could put a stiffer spring in it but dont remember what the spring was from. i guess adding a washer would stiffen the current spring like on the turbo xs bov's? lmk. thanks

 

[williamb82]

ok, this may sound stupid, but ive never pulled an oil pump apart. which side of the spring did the washer have to go to and what diameter washer was needed? also, for an 1/8th in that is what, maybe 2 washers? lmk. thanks.
william

 

[williamb82]

well, is there any other way to make the pump push a higher pressure at idle? normal pressure at idle is 3-4psi and i would rather have it at ~10psi. i know the bearing clearances play a large role but i dont want to make them to tight as that would cause problems. to bad we cant overdrive the oil pump. that would solve the problem since it would only raise the pressure at idle since the releif valve would regulate maxiumum pressure. would there be a way to overdrive the pump at all besides custom machining a new oilpump drive gear and trying to find a timing belt that is the perfect length shorter?
william

 

[williamb82]

thats not the oil pressure i have, its what i read was acceptable in either the chiltons or the haynes(dont remebr which at the moment). i just want to make sure when i build my other motor that it will be trouble free for at least a year or 2. i have a lead foot and drive the car very hard day in and day out. you can ask eric, paul, or dave, they will tell you. lol. anyhow, since im about to put the short block in my 84 i will try the shim mod to the oil pump. btw, ,anyone know where i can get a 5m pump cheap. i found one on toyotaparts.com and it was like ~$175. id rather not go broke on a oil pump for this block. i will definatly go oem for the race motor though.
william

 

[williamb82]

hey, just an fyi. anyone thats gonna put a 5mge pump in a 7m needs to swap the 5m oil pump drive shaft in as well. that was the source of that knocking noise i had. dave can testify to that. we spent over an hr listening to the noise and checking things and it disappeared and came back several times. it was weird. this was about 6hrs before my car got totalled so i have plenty of time to swap the drive gear now. hth.
william

 

[williamb82]

well, im sure the shaft was worn, the motor wasnt new. hopefully you dont have any problems. i myself would like to know if the gear on the top of the pump could be swapped between the 5m and 7m pumps. anyway, when i get the settlement for my 84 ill prolly buy a 1.2mm mhg and the main bearings and just swap the shaft. id like to put a new mhg and get rid of the one ive reused half a dozen times.it will prolly be awhile before the 7mgte makes it into another mkii. just figured id give you the heads up. on my race motor im gonna be sure i use the 5m drive shaft though.
william