1dirtyZ

iTrader: (1)

i tried to replace the oring on the pickup tube where it mounts to the pump,but when i seperated the pump from the tube , there was no rubber oring? all there was was a metal looking kind of oring on the pickup tube. should i go ahead and put the rubber oring on or is there something else i should do?

thanks

bdawg/98mechamta#9

TTT for ya , i am having the oring problem , after the motor is installed! , i think . symptoms are very normal O.P. until shes warm , then when its warm it can go down to about 10 psi @ a stop light then when moving normally , 20psi , and then as i get on it goes up slowly to a max of 40 psi, does this sound like it ? and how to fix it ? and how to avoid it if someone else does the work?

now do i hit continue ? or post ?

1dirtyZ

iTrader: (1)

hey bdawg!

yeah i kinda had those problems.
when the car is warm the oil pressure starts dropping to 30~35 psi ( this is supposed to be a high volume oil pump)and when i floor it it picks up, but after i let off a WOT run , the valvetrain gets very loud ( like a colapsed lifter) then slowly quite down. when i check my oil i find lots of bubles on the dipstick too.

i'm replacing the oring because i read somewhere here that if the oil ring is cut or whatnot , you will end up sucking oil and foaming the oil and all that nasty stuff.

Classic

iTrader: (3)

Replace the oring. I had to do it with my car after installing a new timing set. Sometimes the o-ring seats up in the pump, so if its not on the tube - look in the pump where the tube goes in.

1dirtyZ

iTrader: (1)

i already looked in the pump,and there wasn't anything there????

RoyO

Its the oring.When I replaced the timing chain on my car the oring stayed in the pump.Oil pressure was slow to respond and was low.At idle I had a couple of lifters bleed down.If you cant do the work have someone take the cover back off and replace the oring.A new one isnt expensive and you should be all set.

Constrictor 98TA

Where do you get a new O-ring from? Is this a GM dealer part, or can you just take your old one to a hardware store and buy a new one?

1dirtyZ

iTrader: (1)

antta , i know it's the oring, the problem is i can't find the one that was supposed to be on my pick up tube .

you can get it from any gm dealership. i don't know about a hardware store??? those rings are in pretty harsh environment.

1dirtyZ

iTrader: (1)

so any one have a clue??
i need to know soo, cause my car has been sitting apart for a few days now until i can figure out what to do.

Krazy98Z28

iTrader: (12)

Was the pump ever taken off before???
How many miles since??

1dirtyZ

iTrader: (1)

yup the pump was replaced 5k miles ago.
it was doing finy for quite a while, the car started to collapse lifters recently and having bubbles in the oil.

Krazy98Z28

iTrader: (12)

Did you have someone put the oil pump on for you or did u do the install yourself.

Also what kind of noise were you getting from a collasped lifter. I'm having the same symptoms as you with the bubbles in the oil and I am getting a loud tick and a metal to metal grind from the passenger side of my motor. I pulled the valve covers and everything looked good. I'm thinking worst case was i spun a main bearing but its hard to say until i take the heads off.

1dirtyZ

iTrader: (1)

the niose i get is just the valve train getting real loud, like i had loose rockers or something.
it happens sometimes when i'm crusing on the highway and almose everytime i let off the gas after a WOT run.

i did install the oil pump myself.

did you check your pushrods?
also if you're taking the heads off look at the lifters, one of them might of rotated in it's seat and is grinding into the cam.

Krazy98Z28

iTrader: (12)

all my pushrods were straight, my next job is to pull the heads.If i find nothing there then i have to pull the motor.

Angie

iTrader: (4)

We had trouble getting them from GM, so we found an alternate supplier...we have them in stock now listed here if you can't find one locally...

http://www.thunderracing.com/index.c...yid=1114#P3399


Angie

6spdTA

I am having the same problem. I replaced the o-ring and it went in easy. Why did this happen,and how can I prevent it from happening again?
I can't belive I've got to take the car apart again.

The Emperor Of Darkness

how to check the oil pump??!?! I mean to see if the Oring is in place or not???
is it hard to do?? it took the shop about a week to finish the engine!!!!

bdawg/98mechamta#9

hey sam , do you have to pull the motor to get at the O ring ? did you ever find it ? i am going to take the heads off and ship "em out and do the cam here real soon , and im hoping that the motor doesnt have to come back out to get at that friggin O ring

1dirtyZ

iTrader: (1)

if you're going to put a new cam in it shouldn't be that hard, cause most of the work is getting the timing chain cover off ( you will have to remove it when putting in the new cam).

when you have the cover off the pump will be at the bottom and right under the pump you'll see the pickup tube. getting the bolt that holds the tube off is the tricky part , you'll have to be patient. good luck!

p.s. what cam are you getting?

bdawg/98mechamta#9

sorry sam , i have been busy with work & the house , i will get probably get a comp cam, or an mti grind , but i think im going to send my heads back to agostino to get the new port job ,wade says they flow like 320 @ .600" then do the cam. all this stuff isnt going to happen on my timetable. ill just slowly get through it, probably months ya know ?

sent you PM / bradyn