Hi everyone,
Just looking through the engine and although the primary gear doesnt seam to have any play on the crank, on the outer side where the primary gear makes contact with the primary gear seal (about where the oil holes are) it is not flat, it s concave, when I run my finger across it it is definately not flat, it is meant to be? Just wondering if i should replace or not.
Cheers,
Steve

Here are a couple of photos, when I look at primary gears online it looks like mine is missing something on the outside near the oil holes? Also my casing is chewed a little as seen, will this be an issue?
Cheers,
Steve

That's NBG, go find a less worn one. 998/1098 ones are common.
Yours is missing the slinger too (if it had one).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks for that, does is matter about the wear on the vlutch housing?
Cheers,
steve

You will need thicker thrust washers, assemble the cover to the gearbox BEFORE you bolt the motor on, set idler gear endfloat around .004" - .006".
Note you can get gaskets in various thickness, I've seen some down to .022" thick. Common ones are .033" approx.

If you can't get thick enough washers, get a machine shop to mill the gasket face down by the amount of wear step at the thrust washer boss measureed with a depth micrometer or vernier caliper.
You can go .005 or so more, thin thrust washers are easier to find than thickest ones.

EDITED after checking a housing.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks for that

looking around all the usual sites and no one tends to have new idler thrust washers, do they not make these any more?
Cheers,
Steve

NOTE my edit to post above.

Not easy to find new but I have ALL the local Mini shop's stock of s/h ones.
Let me know what you need. Thickest I have are .136" I think. I can surface grind down to whatever you need.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Awesome, thanks for that. Will contact when im up to putting it back together

I would be checking that you have both the dowels in the "Block to box" & the correct dowels for the "primary case to gearbox"

looks like the "primary case" doesn`t line up correctly with the crank center line to me

i`d be looking carefully at all those alignment & centering issues to be honest
going by the offset shown with the gouging in the primary case from attempting to remove the primary gear

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Will definately check it all when its time to put back together

I agree with Matt, something is not quite right in the alignment.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Could it be anything to do with idler bearings? Both getting replaced as were in poor shape.

I checked block, pins are non existant or nt long enough as is one on the housing. Are these still available ( name of item)? How hard to put in/ take out?
Cheers,
Steve

Matt would have some, new or s/h. Both dowels are in the gearbox, not the block.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.