spyder348

About to install a fresh motor in an 86 951 and do not want or have non broken belt covers. I know for the t belt the flywheel shows mark through bell housing for TDC then cam gear has mark to line up with notch on housing. As for the balance belt what should i do. Crank still at tdc i know the drivers side shaft needs mark going somewhere near 12 o clock and pass. shaft somewhere near 6 o clock.

DDP

Use the factory covers to scribe marks on the balance shaft front metal caps. Personally, I'd think twice before running without the covers, specifically on a street car.

Van

You're screwed.

(Actually, put the lower balance shaft mark pointing straight down, and the top balance shaft pointing straight up...)

spyder348

DDP i know its not the smartest thing. I have done it before and scribed the marks like you said. Van is that right? with the up and down pointers? which mark do you use the 0 in the front of pulley or arrow on rear of pulley

87944turbo

Here is an illustration I did a while back that I think should help.

I think it shows the angles pretty well. I run w/o covers and this is what I use to set mine.

alxdgr8

Thanks Ben! I'm about to do this tonight also.

Van

If I recall, because the engine is slanted, the purple marks in Ben's diagram are almost lined up with vertical...

Certainly scribing the marks on the housings would be the best bet.

m73m95

His illustration is correct. (At least that's how I lined mine up). I just held up my old cover to the engine, and lined them up. Top is at 1 o'clock, and bottom is at 7 o'clock.

The BS belt teeth are big, so if you're a tooth off, its very noticeable.


(I didn't think there was 6 of us w/o belt covers lol)

reno808

I am also going to run with out cover however i am going to run a spliter that will go over the bottom

spyder348

im running custom splitter panels as well which cover bottom so road debri should not be a problem. looks like this thread was able to help some people thats great. and m73 your right with 1 and 7 o clock in mind the teeth are big, its hard to F up.

DDP

When the pulleys get wet they'll rust, rocks and such aren't your only enemy here.

Anyways, like Van said, that picture is more upright than the engine is. So in reality when you look at the engine, the keyways on the balance shafts should both be at 11 o'clock. The 0's are opposite of each other, like seen in the picture.

spyder348

bring on the rust. lol motor is about to go back in. timing belt is done. geuss ill wait and do balance belt when motor is in so i can clock the marks correctly.

m73m95

What's rust? I live in a desert.

When your engine is 180deg, and the BS is spinning at twice engine speed, water doesn't hang around long anyway.

DDP

I'm just speaking from my experience. It only took about 1k miles before mine looked like garbage on my new motor. (I also had a splitter with belly pan) And when you don't have the stock airbox, you can see the rusted turds pretty easily. I'm all about deleting and simplifying, but I've realized there is a point where it's overdone. I'm personally not ok with something looking like crap shortly after I spent thousands to make it right. Just trying to give you a heads up. It's different on a track car when you want ease of access.

reno808

DDP i see ur point my are already rusty and i havent driven the car yet. but i can live with that because i can always check the tension. and i can a lil of WD and its fine