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There are two large hoses approximately 5/8-inch diameter, and one small one approximately 1/4-inch diameter. It is often this small hose which fails and allows engine gasses to escape - right in front of the cabin ventilation air inlet which allows the smell in the car.
To find the small hose, first remove the engine cover. This is the plastic shroud which surrounds the oil fill cap/dip stick. There are two plastic tabs on this cover which snap onto the dip-stick tube flange, and a locator clip at the other end wiich sits on an engine lifting eye. You will see the small hose located immediately adjacent to the back edge of the valve cover after the shroud is off. One end of the hose connects to the throttle body, the other end to the bottom of a plastic Tee-fitting going into the valve cover (unless the latest PCV modification was done, in which case it will be connected to a brass fitting on the side of the dip-stick tube).
At about the mid point of this hose will be a small plastic/nylon cylinder which is a checkvalve. This checkvalve also needs to be replaced. You will probably find the small hose heavily rotted and maybe the checkvalve barbs snapped off. The small hose is protected by a larger foam hose between the checkvalve and the throttle body.
Replacement is easy. Pull the hose end off the plastic Tee-fitting or brass fitting, pull the hose end off the throttle body, cut the single nylon tie securing the hose to the valve cover, and yank it out of the engine compartment. Save the foam outer hose and place it over your new PCV hose/valve assembly. Route the new hose in same manner as old hose, and push the two ends onto their respective barbed fittings. Use a new nylon tie to secure the hose to the valve cover.
You should perform the PCV update also if it hasn't already been done. I had this small hose replaced at the Dealer, (I thought the rotted hose might be a serious problem), and they only charged me 0.2 hours of labor. I self performed the PCV update a few months later.
The hose and checkvalve assembly will cost from $30 to $45 depending where you buy it (on-line site sponsor or Dealer), but they have been offered on internet auctions the past couple of weeks for only $10.
Good luck.
posted by 198.208.22...
_______________________________________
Saabs owned:
2008 9-5 Aero Sedan, sold at 227K miles
2006 9-3SC 2.0T - Wife's daily driver
2000 Viggen Convertible - Sold May, 2022
1964 Quantum IV Formula Car - Retirement project
2000 9-5lpt Sedan, sold at 318K miles
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(#882) [Profile/Gallery]
(more from MI-Roger) on Thu, 9 Dec 2004 09:05:30
