Replace bottom o ring on power steering box on a 1979 trans am
I'm guessing that you mean the oil seal at the pitman arm, where the stering connects, since this is the seal that usually goes bad. You need a pitman arm puller to remove the pitman arm. It is a specialized tool and not easily substituted for so try to borrow or rent one. With the pitman arm off there is a snap ring that has to come out. Once that's out get an empty drain pan and put it under the box. Start the engine and turn the wheel hard to the right, all the way. This should blow the seals out. With the seals out shut it off. In your pan should be a dust shield, a washer and the oil seal.
If you have to go in there with a pick BE CAREFUL not to scratch the steering shaft. If you scratch it, go buy a used steering box.
BEFORE you put the new seal in, get some emery cloth and clean up the rust and grime from the steering shaft and the inside of the box up to the snap ring. Make sure both are smooth and clean. This is critical because the seal can be torn or scratched or bent and won't seal properly and you can do it again. Tap the new seal in with a big socket that is the same size until it seats in the box, replace the washer and dust shield and snap ring. Turn the wheel until the pitman arm slides back on. It will only go on in one position. Tighten it to 185 ft-lbs if you have a torque wrench. If not use a strong arm and tighten until you can't turn it any more. Fill the steering pump and try it out. This should work.
Keep in mind that over time, believe it or not, that rubber ring will wear grooves in the steering shaft and you may have to change it anyway if it starts leaking again in the future. Hope this helps.
Jan 19, 2010 |
1979 Pontiac Firebird