Dialing in Scattershield

[bogster]

Evening troops,

Okay, I installed my Macleod scattershield on my small block chevy this evening. I mounted the magnetic base and dial gauge to the flywheel with the dial finger touching the ID of the scattershield were the gearbox will align into.

As I moved the flywheel 1 revolution in 1/4 turn increments I found the maximum deviation from zero on the dial gauge to be 0.002". If I understand correctly I have to 1/2 this reading to obtain the correct misalignment reading. Therefore the maximum misalignment of the scattershield in its current position is 0.001". As the maximum acceptable is 0.005" for the Tremec TKO 500 I am well within the allowable tolerance.

Is this right? I hope so. Hopefully somebody will say yes.

So now I guess I need to take the scattershield back of and install the clutch and pressure plate. Geez, it never ends....Great fun

[kdavies3]

Yup! you got it right as far as I remember, Have you drilled and fitted dowels through the scattershield and into the block, so you don't have to redial it in?

I didn't bother I just like hard work.

The ideal is to have the crank spigot bore concentric with the scattershield bore.

Scattershields are heavy ain't they.

[bogster]

Two dowels were in place on the block when I started. I haven't had to replace them with offset dowels (thank goodness). Apparently from the information I received from ClassicChevy5Speed (were I bought the gearbox/scattershield) Macleod dial there scattershields in at the factory. I thought you would have to do it for each individual block. However what would I know

Anyway I've checked approximately 5 times and each set of checks are approximatley the same and all well within the .005" tolerance.

Got the clutch on easily enough now so Scattershield and gearbox on tomorrow night hopefully. That Draper clutch installation tool is very handy for aligning the pressure plate and clutch so you can mount it easily on the flywheel. Recommend it and its cheap as chips too.

[wilf]

Knowing what a trial this can be for some folks, consider yourself a very lucky b*****d. LOL

[dave]

Hi Colin.
Another part to dial in is often overlooked.
the gearbox mounting face of the bellhousing/scatter shield needs to be parallel with the flywheel too. If this isn't right then lining up the hole in the middle will be pointless as the end of the input shaft could be pointing just about anywhere.
To correct this you would either need to put shim washers over the bellhousing to engine bolts or get the face of the bell housing machined.


...So go back oput there and do it all again starting with the setting of the box mounting face first.


Good luck.

[mylesdw]

I don't even know where Scattershield is. Is it near Rotherham or further north?

[bogster]

Thanks Dave, But I've already checked the face and it is correct.

[mikey]

[quote:99f629e4ba="bogster"]Two dowels were in place on the block when I started. I haven't had to replace them with offset dowels (thank goodness). Apparently from the information I received from ClassicChevy5Speed (were I bought the gearbox/scattershield) Macleod dial there scattershields in at the factory. I thought you would have to do it for each individual block. However what would I know

Quite a bit actually as you are right. The bellhousing should be manufactured true if its a good one, its the blocks that vary and movement can change the situation dramatically. Just thank your lucky stars that you dont have to prat around with it. I was also lucky and actually got zero without touching anything. My last car took me two sets of dowels a 'get your head around this degree' and two dial gauges as the first one needed a telling off for getting most of the way around and then bootoming about 4 degrees before the 360 came up.

Good luck with it
Mike