DIY: 5sfe Oil Pump Diagnosis

[Mister_Perkins]

If you are experiencing low oil pressure, there could be multiple things to account for that but I am going to show you how to determine if the oil pump is good or not.

Tools needed:

10mm socket / ratchet
12mm socket / ratchet
Flat head screw driver
Snap Ring Pliers
Show towels
Motor oil

First thing first is to get to the oil pump and remove it. You need to remove the timing belt, exhaust, oil pan, oil strainer then the pump will come off. Its pretty extensive but once you get the oil pump off the following guide will help you determine if the pump is good, or needs replaced.

Heres a blowup to follow. If you forget what part i am talking about, refer to the following image:



Once you get to the pump, were first going to remove the oil pump body cover. There are nine 10mm bolts holding the pump body cover to the oil pump.




After pulling the Oil Pump body cover off, Remove the pulley by either using the SST 09616 – 30011 or you can fit a flat head screw driver in there and break the nut loose. The nut is 12mm.



Once you get the pulley removed it should look like the following picture. Note: I've also included a part number in case you want to replace the seal. As you can see the seal in the picture is bad and was leaking



Heres a few pictures of removing the seal:



Pull the drive rotor out from behind the Oil Pump Body cover and place it into the oil pump housing and using a feeler gauge measure the gap between the Driven rotor and the oil pump housing and also between the Drive and Driven Rotor. Specs are listed on pictures:




Flip the oil pump body over and remove the Snap ring (C-Clip), spring, and Relief Valve.




Apply a light coating of oil onto the Relief valve and re-insert it into the body. It should fall under its own pressure to the bottom. If it doesn't fall, first try to clean the inside of the tube the relief valve rides in with parts cleaner and a shop towel. Pour a small amount of oil into the tube and try it again. If it still doesn't drop, replace the relief valve. If a new relief valve doesn't work, replace the entire assembly.





Here is a run-down of all the parts for the oil pump:



EDIT:

Once you are ready to put the pump back together, make sure to put some petroleum jelly inside the Driven Rotor (Where the Drive rotor fits inside). It will help your pump prime quickly

[ty**20]

great DIY. very detailed. will be very helpful for other wanting to repair oil leaks. keep them coming.

[ajkalian]

Very, very nice DIY.

I vote for sticky.

.

[LynchburgCSI]

More gold by Perkins... stickying.

[peshwa]

TREMENDOUS work Perkins...are you an auto school student or what?? lol...I would love to work on my car all day but I gotta earn something too

[RichieRichJP]

So when priming the oil pump before installing the motor, are you supposed to pour the oil into that valve relief hole? I'm not sure exactly which hole is best suited for doing that...

[Mister_Perkins]

Originally Posted by RichieRichJP

So when priming the oil pump before installing the motor, are you supposed to pour the oil into that valve relief hole? I'm not sure exactly which hole is best suited for doing that...

No, you pack the drive and driven rotors with petroleum grease. You put oil onto the relief valve to make sure its working properly. "Dropping under its own pressure". It wont work to try to put oil into the relief valve hole because the oil will just pour out the hole above the relief valve. Just use the petroleum grease on the two rotors when you re-install the pump

Originally Posted by peshwa

TREMENDOUS work Perkins...are you an auto school student or what?? lol...I would love to work on my car all day but I gotta earn something too

I was an auto school student back in 2006 (UTI)

[RichieRichJP]

Oh ok. I thought you were talking about it there, but wasn't entirely sure.
Thanks for the writeup!