Throttle body leak: Is there a fix?- YES THERE IS!
08-05-2008, 04:05 PM
#17
Burning Brakes
Mike
Good work! I also suspect that this will help keep the TPS from getting oil in it. I just replaced my TPS last week and it was filled W/ oil. The only place it could have come from is where the TPS fits into the throttle body. Damn I wish I had known then.......
Good work! I also suspect that this will help keep the TPS from getting oil in it. I just replaced my TPS last week and it was filled W/ oil. The only place it could have come from is where the TPS fits into the throttle body. Damn I wish I had known then.......
08-05-2008, 04:22 PM
#18
Three Wheelin'
--------------------------------------------------------------------------------
Just my $0.02, but having rebuilt several 944/951 TB's; I wonder if the rebuild kit would work here. I am getting ready to do the whole intake deal on my MY 83 and have been wondering about this. Those cars have needle bearings and several small orings. The orings turn to plastic and shrink over time. The kit is only $15-20. Just cleaning the needles and regreasing and replacing the orings would be about all we would need for this. That 944/951 TB kit had a bunch of model specific parts. You need to take the throttle plate out and slide the throttle shaft out to get to it.
Just my $0.02, but having rebuilt several 944/951 TB's; I wonder if the rebuild kit would work here. I am getting ready to do the whole intake deal on my MY 83 and have been wondering about this. Those cars have needle bearings and several small orings. The orings turn to plastic and shrink over time. The kit is only $15-20. Just cleaning the needles and regreasing and replacing the orings would be about all we would need for this. That 944/951 TB kit had a bunch of model specific parts. You need to take the throttle plate out and slide the throttle shaft out to get to it.
08-05-2008, 04:30 PM
#19
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Excellent!!! I have two euroS TB's waiting to go into my cars. Time to take them apart first.
08-05-2008, 09:44 PM
#25
SUCCESS!
I took out the throttle plate and shaft and looked in there and lo and behold! There's an O-ring in there on each end along with the bearing assembly. The bearings were fine, but the O-ring or bushing was split in several places on both sides and no longer sealing:
In an amazing stroke of luck, I happened to have some spare O-rings from the cam cover bolts and they fit in there perfectly. I lubed them up, pressed them in place with a couple of popsicle sticks, and then cleaned it all up and reassembled. Now it holds 5psi of pressure! (it might hold more, but the MAF kept popping out because it was only held in place with a cargo strap wrapped around it)
I recommend that if you're doing the top-end refresh to make sure all your plastic and rubber parts are new, these O-rings go on your list of things to replace.
Thanks Everyone!
I took out the throttle plate and shaft and looked in there and lo and behold! There's an O-ring in there on each end along with the bearing assembly. The bearings were fine, but the O-ring or bushing was split in several places on both sides and no longer sealing:
In an amazing stroke of luck, I happened to have some spare O-rings from the cam cover bolts and they fit in there perfectly. I lubed them up, pressed them in place with a couple of popsicle sticks, and then cleaned it all up and reassembled. Now it holds 5psi of pressure! (it might hold more, but the MAF kept popping out because it was only held in place with a cargo strap wrapped around it)
I recommend that if you're doing the top-end refresh to make sure all your plastic and rubber parts are new, these O-rings go on your list of things to replace.
Thanks Everyone!
Mike, you just taught me something too, and I thank you. Allow me to return the favor and point out that if those orings needed replacing, there is one in between the throttle body mount that will need to be replaced also, most likely.
I just replaced the oring between my throttle body mount....and it was cracked just as you described your throttle body orings, so I guess I'm another one who needs to get back in there and look at those orings too.
Thanks for the good work, Mike!!
08-05-2008, 11:21 PM
#26
Craic Head
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Thread Starter
Mike, you just taught me something too, and I thank you. Allow me to return the favor and point out that if those orings needed replacing, there is one in between the throttle body mount that will need to be replaced also, most likely.
I just replaced the oring between my throttle body mount....and it was cracked just as you described your throttle body orings, so I guess I'm another one who needs to get back in there and look at those orings too.
Thanks for the good work, Mike!!
I just replaced the oring between my throttle body mount....and it was cracked just as you described your throttle body orings, so I guess I'm another one who needs to get back in there and look at those orings too.
Thanks for the good work, Mike!!
I'm glad I could return the favor. The advice and help you've given me is far more than this little job is worth, but you're welcome just the same.
If you mean the O-ring between the throttle body and the lower air guide, I got it. Adam showed me that one, but thanks.
No problem, I'm just glad I finally got it fixed. My new (2nd set
) of intake gaskets and the other parts I need are on their way from 928 Spec so I should be up and running before the end of the weekend.
What did Billy Joel say? "The things I didn't know at first, I learned by doin' twice."
08-05-2008, 11:29 PM
#27
Craic Head
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Thread Starter
Bill, thanks for the tip. There wasn't any loctite in there originally. I assume this is something that is a problem after you've had the screws out once? I'll get some threadlocker blue in there before I finish it all up.
08-06-2008, 12:14 AM
#29
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
They are not Loctited - they are staked. Loctite 290 is used in place of staking.
Last edited by Bill Ball; 08-06-2008 at 01:59 AM.
