Removing and replacing oil pump

hesermon

Member
Nov 9, 2007
399
11
18
Near Memphis, TN
Don't have a step by step but it's really pretty straight forward. Remove the crossover pipe, remove the oil pan. The pan will clear the screen if you carefully maneuver it around. The oil screen and pump are easily accessible. Remove and replace. Completely remove any gasket material from pan and block. Install new gasket onto pan using RTV black gasket sealer, reinstall pan (do not over tighten bolts). Reinstall crossover, turn key, check for leaks, enjoy!;) You may want to change the rear main seal while you're there but that is a whole other issue. Good time to change if it's leaking, if not don't fix the unbroken!:D
 

Chuck Leeper

8/10's of a century!
Staff member
May 28, 2001
12,014
1,658
113
Madison, Ga.
Suggest you..

Don't have a step by step but it's really pretty straight forward. Remove the crossover pipe, remove the oil pan. The pan will clear the screen if you carefully maneuver it around. The oil screen and pump are easily accessible. Remove and replace. Completely remove any gasket material from pan and block. Install new gasket onto pan using RTV black gasket sealer, reinstall pan (do not over tighten bolts). Reinstall crossover, turn key, check for leaks, enjoy!;) You may want to change the rear main seal while you're there but that is a whole other issue. Good time to change if it's leaking, if not don't fix the unbroken!:D
take a look at your TR, B4 you r&r the oil pump...You may find it "missing" once you get the pan off.:rolleyes:
 
  • Like
Reactions: 1BUICKT

hiboom

Hiboom
Dec 29, 2007
791
46
28
St.Joseph
oil pump

not sure why you want to replace it ?It's pretty simple I remove the oil filter and right side intercooler bracket.there are 2 screws inside the oil cooler line housing, 5 or 6 around the out side housing.I always mark and remove cam sensor because i like to re prime the system with a drill you may be able to remove the 2 oil pump gears without removing the cam sensor. then fill the oil pump housing with Vaseline to prime on restart.If I did that I would disconnect the orange ecm wire and turn motor over till i got oil pressure to avoid a dry start up.not sure what you are trying to gain,the oil pump housing is aluminum the gears are steel if there is ware there I would think It would be to the housing before it would be to the gears unless you are adding a boost plate to increase oil pressure?
 
  • Like
Reactions: glennhennig

Just a Six??

OK! Who Farted??
Jul 4, 2003
3,248
5
38
59
Toronto
take a look at your TR, B4 you r&r the oil pump...You may find it "missing" once you get the pan off.:rolleyes:
That car must be a Custom Built unit having the Oil Pump in the pan???

The standard 86-87 Oil Pump bolts onto the timing cover pass side bottom. 6- 10mm head bolts with 2 behind the oil filter.
 

rb68rr

Active Member
May 25, 2001
1,406
3
38
69
Terrell, Texas
community.webtv.net
Forgot to mention that I did get the oil pressure relief valve out and didnt see anything wrong with it! Do I need to take the whole timing chain cover off or just check the gears or both? And then the pan? How would you go about it Chuck? Thanks, R.B.
 

turbofabricator

Well-Known Member
Mar 7, 2004
3,727
219
63
Seattle arena
www.ignorant-red-neck.com
Hesermon just gave instructions to R&R a small block Chevy oil pump, NOT a turbo Buick oil pump.

The oil pump is integeral to the timing cover, and to really do it right I would pull the timing cover. But......WHY do you NEED to replace the oil pump? If you have low oil pressure, look elsewhere. Time to R&R the engine and check bearings. If it is a rebuilt engine, then it might be a couple of things. A oil gallery plug popped out, bad bearing clearance, spun cam bearing, worn out lifter bores, loose oil pump pick up tube, NO oil pump pick up tube, oil pump clearance way too loose, ect. Still good idea to pull the engine and take a look. Everything needs to be checked, and double checked. I need a little more info on WHY you feel the oil pump needs replacing. I have never seen a worn set of oil pump gears really cause a low pressure issue. I'm sure it could, but after 20+ years of building these things, it is useally a bearing issue that casues oil pressure issues, or a really loose thrust clearance in the pump.
 
  • Like
Reactions: bison

Just a Six??

OK! Who Farted??
Jul 4, 2003
3,248
5
38
59
Toronto
get the car on ramps or stands. remove pass side intercooler bracket.
remove oil filter. You will see 6 10mm head bolts. 2 hiding behind where filter was but now you can see them. remove 6 bolts & off comes pump cover & gears will fall out usually.
Check all surfaces etc. Install new or used gears with vaseline & gasket & tighten back up.
Unplug ecm & spin the motor to get some pressure up. Start car & look for leaks.

This is the BASIC way to do it but as Ken said it's usually not the gears but something else!
 

hesermon

Member
Nov 9, 2007
399
11
18
Near Memphis, TN
Hesermon just gave instructions to R&R a small block Chevy oil pump, NOT a turbo Buick oil pump.

The oil pump is integeral to the timing cover, and to really do it right I would pull the timing cover. But......WHY do you NEED to replace the oil pump? If you have low oil pressure, look elsewhere. Time to R&R the engine and check bearings. If it is a rebuilt engine, then it might be a couple of things. A oil gallery plug popped out, bad bearing clearance, spun cam bearing, worn out lifter bores, loose oil pump pick up tube, NO oil pump pick up tube, oil pump clearance way too loose, ect. Still good idea to pull the engine and take a look. Everything needs to be checked, and double checked. I need a little more info on WHY you feel the oil pump needs replacing. I have never seen a worn set of oil pump gears really cause a low pressure issue. I'm sure it could, but after 20+ years of building these things, it is useally a bearing issue that casues oil pressure issues, or a really loose thrust clearance in the pump.
Feeling pretty stupid here, I was half asleep when I posted, I was thinking of the oil pick up screen/ tube! OOPS!
 

turbofabricator

Well-Known Member
Mar 7, 2004
3,727
219
63
Seattle arena
www.ignorant-red-neck.com
Ya, I'm glad I have NEVER posted something wrong before.;) There have been lots of times I have been typing away with a reply to someones problem and then go back and proof read it. Only to re-read the original posters' question and then have to hit the delete button.

The the original poster: What timing cover are you using? Stock or aftermarket?
 

2toneNV

Member
Mar 5, 2007
959
22
18
Earth
Bringing this back. I am trying to remove the oil cooler adapter and pump to replace gaskets. Then clean and paint everything after. I have removed the four (4) bolts that can be seen, but how do I get the other two (2) bolts out and the fleet adapter off!?!
 

Attachments

2toneNV

Member
Mar 5, 2007
959
22
18
Earth
I have the 28mm socket that I bought for the crank bolt but of course that is a smidge to small. .....