dhaugen

have a 1983 944, Can anyone explain why the woodruff key would be stripping out the crank gear that runs your balance shaft gear. We had taken this apart to check the water pump. every since we put the car back together we are having problems with this. We have replaced the balance shaft gear, woodruff key, support washer and oil seal. This last time we thought it was fixed but after about 400 miles we started seeing fluctuations in the oil pressure, only to discover that the balance shaft gear is stripping out again. We also are sure that the bolt that holds the gear on the crank has been torqued to 155 ft lbs. Can anyone help.

35thSLP

Does the balance shaft turn freely? if it does are you putting the gear on backwards? If not check to make sure the housing is not causing the shaft to bind. I had this problem in my sons NA (lower housing) after a seal change. Fixed the binding and she started to turn free again.

austin944

The PET parts catalog shows there were 4 different woodruff keys for the crankshaft, each with a different part number. I'm not sure if that's the cause of your problem but it's certainly worth investigating.

xsboost90

doesnt the crank pulley goe to like 300lbs- somewhere close- and possibly the lower sproket is floating and not keeping enough pressure on the oil pump gears. That would cause oil fluctuation.

jonnybgood

Clark's Garage says "Install the crankshaft bolt and torque to 210 Nm or 155 ft-lbs." If you are getting it to 155ft lbs then you are ok on the torque.

I must assume when you say "the balance shaft gear is stripping out again" that you mean that the woodruff key is slipping or stripping the inside of the balance belt sprocket on the crankshaft. Is this correct? I suspect english is not your primary language and that you are talking about the sprocket that drives the balance belt and not gears.

Also, "why the woodruff key would be stripping out the crank gear that runs your balance shaft gear". There are no gears, only balance belt sprocket, camshaft belt sprocket and ribbed belt pulley that are attached at the crankshaft. Please describe which sprocket is stripping out.

xsboost90

hm, maybe it was my supra that was 300lbs... ?

dhaugen

Yes, it is the balance belt sprocket that drives the belt for the balance shafts. This sprocket is stripping out then not allowing enough pressure to have constant oil pressure.

xsboost90

is your crank screwed up enough that it wont allow the woodruff key to stay in place. Ive seen it.

35thSLP

You by chance are not putting the crank bolt in with the washer on backwards? One side is flat and the other side is beveled. you want the bevel facing away from the engine. the flat side should be against the pulley. Just guessing....

Granite 944

"Yes, it is the balance belt sprocket that drives the belt for the balance shafts. This sprocket is stripping out then not allowing enough pressure to have constant oil pressure"

this makes NO sense.......whatsover.


"You by chance are not putting the crank bolt in with the washer on backwards? One side is flat and the other side is beveled. you want the bevel facing away from the engine. the flat side should be against the pulley."

THIS would make the ONLY logical sense seen here so far. You REALLY need to look! In other words.........its not "stripping out the balance shaft drive gear on the crankshaft........its beating the crap outta it! That keyway in the crank must look really good by now.

Do a search here on crankshaft pulley bolts, and their washers. Theres two different types, and if ya got it on backwards.........well...........live and learn.........the hard way! Good luck

jonnybgood

I remember reading about this problem once, it can happen. Double check that you have the washer on correctly.

If the balance belt sprcket is slipping on the crankshaft then you must have the wrong woodruff key as in too small to engage the sprocket or the inside of your sprocket is really screwed up and there must be some damage to the crank.

You are installing the drive pullley for the alternator and air conditioning right? there are four bolts that hold it to the balance sprocket. If the balbnce sprocket is slipping then that pulley will slip too.

That is all I can think of.