|
|
Post by rotorhead on Jan 14, 2009 21:50:50 GMT -5
Me again! Im in the middle of a timing chain change out, do you guys recommend changing the oil pump? I have heard different opinions.
|
|
|
|
Post by joes94yota on Jan 15, 2009 10:05:34 GMT -5
I replaced mine, but I also had low oil pressure. Either way just make sure you prime your oil pump before installing, i forgot to and it cost me a spun crank bearing.
|
|
|
|
Post by whomadewho on Jan 15, 2009 12:02:47 GMT -5
With the use of a feeler gauge you can determine the amount of wear the oil pump has. The repair manual shows the maximum wear allowed before the oil pump needs to be replaced. As mentioned before make sure you prime the pump to ensure maximum lube protection when starting the engine.
|
|
|
|
Post by tonkatoy93 on Jan 21, 2009 8:45:03 GMT -5
While a worn out oil pump CAN be the cause of low oil pressure, there are two other more likely causes. The first and most common is worn main and rod bearings. These parts see the most severe duty, and will normally be the first parts to affect oil pressure. The second is the oil pump pressure relief valve (the big bolt on the passenger side of the pump housing. If dirt, varnish or carbon gets into the valve under this bolt, it can hold the valve partially open, and starve your engine of oil. I spun a rod bearing because of the second reason, caused by an aftermarket replacement front seal.
The oil pump is usually the best oiled part on the engine. As long as you have SOME pressure, the pump is getting all the oil it needs. Where it goes from there is usually the area for concern.
All that said, If you have it pulled apart, and have the money, I'd go ahead and replace it. If not, totally disassemble it and clean it all, especially the relief valve bore and piston. And replace the front seal with the oem seal.
|
|
