Riff

Charlie-

The PN you give for your balance shaft does not match the PN in PET. I have the balance shafts out of a '88 S motor, but cannot find the PN stamping you say is on the "flat side of the back weight"? According to PET, the PN change is only different for the 2.7L version of the N/A motor. The 951, S2 use the same PN as the 85.5+ 2.5L 944 motor.

Actually the PN you list 944 102 201 09 is very similar to the PN for the balance shaft of the early motor 944 102 201 07. Any chance the motor in your car is not original and there is an early 944 motor in it's place?

HTH,

Charlie

I just checked the motor # it is M44/07 43G07899

Anyone know what year engine it is.
I suspicion that it has been changed because the front seal kit for and 86 had the wrong size seal for the cam shaft. Chuck at Paragon said the seal I needed he thought was for an older engine.

rsrdan

Guys, you dont need the balance shafts.

No balance belt,no shafts,no problem.!!

kit is from www.area951.com

Charlie

Can you tell a difference in vibration (at idle and various rpms) without the shafts????

rsrdan

not a bit.you may hear a rumble at idle,sounds like a aftermarket muffler,but no biggy..

Talk to Scott ( nice guy).ALL his cars that leave his shop,leave with no shafts

Charlie

I tried to find the kit on the web site but could not. How much are the kits?

Granite 944

According to my Porsche's "Models/Dimensions/Tolerances" book, your engine is an 1986 model year block.

The digit 4= 4cyl. engine
The digit 3= 944/2.5l USA,Canada,Australia, Japan or a 924 S/2.5l Europe.
The digit G= 1986
The remaining= serial number


I don't know what the differences are on the balance shafts if any, at least after '85.

If you find out that there is a difference between these shafts/bearings after '85, let us all know!
HTH

Charlie

Thanks for the information Ken. If I find a difference I will let you know.

Granite 944

Looking thru my spec. book, I see that the M44/07 engines were used starting '85/1 to and including '87 models. This spec book shows only one set of dimensions for the balance shaft's diameter, the bore of the shaft bearing shells at the crankcase housing or shaft cover, and for the bushing in the bearing housing. This spec book covers 944 Models '84 to '89.( Also 924S models 86-89). Printed Jan/1990.
This being the case, I would assume that if you still wanted to replace your balance shaft/housing, then as long as you stay with parts you know came out of M44/07, model years '85/1 to '87, you should be just fine. You might even be ok with parts up to '89. Since this book only shows one set of dimesions, it just might be the only difference between the model years is how the bearing/bushing are oil grooved? I don't know for sure, just food for thought!

nine-44

I beleive that the difference on the early and late shafts was that the late has a plastic cap to make it a full circle. The early ones had no plastic cap leaving them as a half circle. There was a huge debate on the turbo forums about balance shafts and wether they are needed or not. Supposedly they are needed and there was a ton of facts in that post that led me to leaving my balance shafts in when I built my motor. You may not notice the vibrations, but your engine, especially the rotating asssembly will. I know when the rubber dampener in mom's 84 auto went bad, it vibrated like crazy. It vibrated so bad that it slowed acceleration of the motor then seemed to smooth out. It didn't, it was just vibrating so fast you couldn't notice it. Looking at the exhaust at higher RPMs it was vibrating terribly, but you couldn't feel it in the car at all. Thae whole motor was vibrating badly, still not noticable. Your call man, good luck.

FSTPRSH

While we're here, I have my engine apart and just cleaned the balance shafts tonight, but I don't know an effective way to remove the one piece "bearing" in the front without causing any damage. I'm very worried about shops around here for the most part, I took my crank in and was asked, "Is that out of a tractor?" Well, look where I live, it was bound to happen; needless to say, it won't be turned there. But if there is a special tool or somthing I could make, that would be great.

Charlie

The one piece bushing in the front can be pressed out by using a socket that will pass through the housing but not the bushing. My bushing was damaged but had not ruined the housing.

Robby

If you call Scott Gomes, he will probably GIVE you the balance shafts for FREE- he told me all I had to do was pay for shipping & he had ~50 sets he would send me... He is very much against them- I'm still debating on whether or not to remove when I build my motor- he makes a great argument AGAINST, but then, other's have made agreat argument FOR- I'm going nuts thinking about it...

rsrdan

Robby, try removing the belt and see what happens.I think you will be surprised.The only thing your out is a 15 dollar belt.The factory did this for harmonics more than anything.I cant tell any difference than a slight rumble at idle......and I bet I gain 2-3 hp at low to mid range.