how to change oil pump drive o ring seal [Archive]

TurboSedan

10-19-2002, 10:04 PM

i removed the air box, throttle body heater lines, both fuel lines (make SURE you relieve fuel pressure FIRST!!), and i think i left the TB in place (it's really easy to R&R anyway). remove the hold down bolt on top of the pump drive, and pull straight out. it might be stuck so you may need to grip the top with a big channel locks or something. i think it was like 5" long or so. clean it with brakleen and lube it with clean motor oil. lube the seal with new clean motor oil also. wrap the teeth with paper (so you don't nick or tear the new seal on the teeth) and slide the new o-ring over it into place on the groove. reinstall the pump drive, and make sure you seat the pump drive before tightening the hold down bolt, then put everything back together. good luck
joshua

TurboSedan

10-19-2002, 10:12 PM

oh yeah, i would thouroughly clean the area of the pump drive before you pull it out, otherwise you'd have all kinds of crap & gunk falling down into the engine.
joshua

stlunatics2oo3

10-20-2002, 11:01 AM

where is this thing located i was lookin and i am confused on where it is located please help casue i am gonna do it

Anonymous

10-20-2002, 11:35 AM

Use a flashlight and look down between the throttle body and intake. I have pics of it if that would help. If you want the pics give me your email address.

stlunatics2oo3

10-20-2002, 12:27 PM

stlunatics2oo3@aol.com

stlunatics2oo3

10-20-2002, 12:50 PM

if the shaft does come out. how do i put it back in ?

Anonymous

10-20-2002, 12:57 PM

Very long needle nose pliers. Unless it will stick inside the drive gear long enough to get it back in.

stlunatics2oo3

10-20-2002, 12:59 PM

does it useually come out or does it stay most of the time ?
is it worth it to have some one do it or what ?

stlunatics2oo3

10-20-2002, 01:02 PM

what if i just put sealant all over the hold down clamp and not change the seal would it stop teh leak or what ?

stlunatics2oo3

10-20-2002, 01:03 PM

how do i get the throttle body linkages off?

Anonymous

10-20-2002, 01:27 PM

You don't need to take them off. Unbolt the throttle body and take the coolant hoses off. Then you should be able to get the throttle body far enough out of your way. I sent you the pics. I had my upper intake off at the time which made it easier to get to but it's possible by just moving the throttle body.
In my opinion it is not worth it to have someone do it. It's a $2-$3 o-ring and you'd end up paying out the ass for labor.

stlunatics2oo3

10-20-2002, 10:37 PM

well i did it one problem was that teh parts store closed as i pulled up to it in my moms car so tomorrow it will be done and teh shaft came out with it but is stuck in so do i leave it in there or what i am confused on how to put it in there

Anonymous

10-20-2002, 11:00 PM

Leave the shaft in. If you pull it out it will not stay when you put it back in.
You have to get the o-ring at a dealer also. You can't get it at any parts store.

stlunatics2oo3

10-21-2002, 09:29 AM

okay i did it and now i see smoke white smoke comin out what i think s the ehuast amnifold is this normal

Anonymous

10-21-2002, 09:37 AM

You probably just got oil or something on it. Give it a day and see if it quits.

chronic139

10-21-2002, 08:41 PM

If you spilled any oil or cleaner on the manifold it will smoke until it burns away.

Jon89le

10-21-2002, 11:04 PM

Hol up, are you talking about that thing that goes in place of where the distributor goes? Its got a gear on it that turns from the cam and turns the oil pump. Is that this thing?

stlunatics2oo3

10-21-2002, 11:07 PM

it is right under teh throttle body it is really easy took me like 2 hours with breaks and stuff but make sure teh vacuum lines are far away i did a careless mistake and now i have a whistling air leak so tomorrow i get to take teh plenum off to change air wires so be careful

TurboSedan

10-21-2002, 11:17 PM

Leave the shaft in. If you pull it out it will not stay when you put it back in.
You have to get the o-ring at a dealer also. You can't get it at any parts store.

i got sorta confused with the some posts here....but.... you have to pull the shaft all the way out to replace the o-ring. i don't see how it could possibly fit over the top part of the shaft. when you push the shaft back down into the hole is will turn as it meets the camshaft. anyway...my o-ring came to a whopping $1.26 WITH tax from the dealer. it is light brown.
joshua

Jon89le

10-21-2002, 11:22 PM

Oh sh*t, where exactly on that thing is the little seal? is it on the gear or on the shaft?

Anonymous

10-21-2002, 11:29 PM

I said to leave the shaft in, not the gear itself. When I pulled mine out the shaft came out with it and then slid out of the gear and fell back into the hole. Not fun getting it back in place.

Jon89le

10-21-2002, 11:42 PM

So the seal is on the gear itself? Where is the seal on it? Because i need to take mine back out to put a new seal on. The motor is still out so i can replace it easily.

TurboSedan

10-21-2002, 11:44 PM

when you said shaft i though you meant the oil pump drive itself (the part with the gear on it)? i just pulled the oil pump drive shaft out and replaced the o-ring, then stuck it back in there. jon - the seal is under the head of the shaft, but you have to pull the whole shaft out to get the new o-ring on there. it is about 5" long i think.
joshua

SuperBuick

10-22-2002, 12:02 AM

Guys you make this job sound so difficult. On my 3.4 all I have to do is remove the intake plenum and both DOHC heads from the motor to get it and then retime the whole engine. Easy schmeezy.

:shock:

-tom

TurboSedan

10-22-2002, 12:12 AM

oh man you are so lucky! :lol:
joshua

SuperBuick

10-22-2002, 12:15 AM

I can just tell you envy me so much Joshua because I get to be under the hood for 15 hours versus your 2 or 3. admit it you're jealous.

:lol: :lol: :lol:

-Tom

Whiskey River

10-22-2002, 08:46 AM

One thing I have been noticing is that nobody has mentioned that after you put the O-Ring on, which by the way, I picked up from my local parts house for $.39, a small block chevy distributor gasket will fit quite nicely as a backup. For those who don't know, it is a small paper gasket that fits under the head of the oil pump driveshaft. You can usually pick those up for about $.25. Just a thought for those who don't want to change the O-ring again.

GnatGoSplat

10-22-2002, 08:56 AM

The brown O-rings from the dealer will last much longer. They are silicone and should last at least a decade. The O-rings I've seen at the dealer (and are included with FelPro gasket kits) are black natural rubber. They'll only last a few years. I definitely recommend the brown silicone O-rings from the dealer for peace of mind.

Whiskey River

10-22-2002, 02:47 PM

Didn't know about the different O-ring types. Might still want to consider the paper gasket as a backup. Something to consider when changing out that o-ring.

GnatGoSplat

10-22-2002, 03:04 PM

Felpro actually happens to have the type of gasket you mention (the one that sits under the distributor head) in black rubber. I got one in my FelPro head gasket kit, and another in the intake manifold gasket kit.

Jon89le

10-22-2002, 08:47 PM

Doers anyone have a picture of where this O-ring goes becasue im still confused? And is this Felpro rubber gasket a suplement to the o-ring or is it required too?

GnatGoSplat

10-22-2002, 09:39 PM

Doers anyone have a picture of where this O-ring goes becasue im still confused? And is this Felpro rubber gasket a suplement to the o-ring or is it required too?

I have no pic of the O-ring, but it's pretty obvious once you pull the oil pump drive unit out of the block. It'll be a black band on the part of the pump drive that goes into the block.
The Felpro rubber gasket is a supplement that Felpro throws into their gasket sets, and isn't required nor used by GM.

stlunatics2oo3

10-22-2002, 10:27 PM

well i did my o ring plus fixed the howling noise and i put the universal performance muffler made by 3 a racing on it today it sounds beefy >?