WTD: Sprint tappet shims

[GTiJohn]

During the engine build, we've found that all of the valve clearances are too tight. On doing the calcs, we know we need the following shims :-

1x0.082", 1x84, 5x85, 2x87, 1,89, 1x 91, 1x92, 1x95, 1x96 and 2x99

Rimmers only start at 0.091"

Is it normal to need smaller than this are is this a symptom of another issue?

If OK, I'm hoping to be able to find the ones I need on here before we have to go and find somebody in Hungary able to do some very small skims for us

[Mad Mart]

Yes, the thinner shims are harder to come by. I have had several down in the 0.080"s & 0.090"s. Usually they are around 0.100" - 0.110". I just took a few thou off the end of the valve stem.

[sprint-revival]

Try QED motorsport for the shims. I used the Lotus Twin cam shims for my rebuild. Good range available here:

https://qedmotorsport.co.uk/product/val ... ous-sizes/

[xvivalve]

I recall sending most of my '80s' to Mart a while ago, but have here an 82, an 86 and an 88.

I have a coin bag full in the '90s' and will compare against your needs when i have an idle moment...

[xvivalve]

Does the head have a performance cam in it? Some of the specialists advocate halving the standard clearance with a high lift cam...

[GTiJohn]

Does the head have a performance cam in it? Some of the specialists advocate halving the standard clearance with a high lift cam...

Nope, just a standard cam.

All small shims gratefully received

[GTiJohn]

Many thanks to Tony and Alun for supplying many useful shims.

I'm only short of the 0.084" and 0.085" shims now, which QED can supply at a very reasonable price.

So I have a small stock of shims remaining, which I will of course send on to the next person needing them