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MG Midget and Sprite Technical - Camshaft End Float

My cam endfloat is 14 thou, where it should be 7 thou max. But am I right in thinking that the endfloat is directly related to the thickness of the oil pump gasket, and how much gloop you put on it?

It seems to me that it is, but I know I'm capable of massive misunderstanding, and subject to attacks of non-engineering brain.
Nick and Cherry Scoop

The camshaft end float is controlled at the front end, by the camshaft retaining plate, and the camshaft sprocket.
Lawrence Slater

If your following haynes manual... the spec is a misprint... sorry I dont recall what the true spec is, but I was cunfused by this also when building my might try the archives as this is mentioned several times

Prop and the Blackhole Midget

According to the BL workshop manual, a 948 has 003-007 thou" end float.
Lawrence Slater

Thank you, Lawrence. So you put the sprocket on before measuring the end float.

That's not what Haynes says.

But anyway, I knew I was being dim.
Nick and Cherry Scoop

If you where to control end float on the other side the pump you would risk putting pressure on the pump, this would wear the pumpgears in to the pump lid and swarf through the engine.

You do know that you mount the pump after the crank/rods/pistons, camshaft and timing gear.
Again to avoid damage to the pump
Onno K

Here is a small in sight
Prop and the Blackhole Midget

Thanks, Prop; it's good to know that others have followed Haynes and gone adrift. I knew in my heart that something was wrong - it would require incredible accuracy in the oil pump body, drive and the slot in the cam, to achieve .003 between front and back.
Nick and Cherry Scoop

Having a few minutes to spare while I come in for coffee, I have looked in the archive for this question.

July 2003 has an exactly similar thread started by "Nick and Cherry Scoop". Eleven years since I rescued that 1275 engine, and I've learned nothing. Oh well.

Nick and Cherry Scoop

Hi Nick we take the clearance down to 1-1.5 thou by machining the cam gear down.

Peter Burgess Tuning

I'd love to do that, Peter. I knew I should have made an offer for one of your machines.
All well, I hope.
Nick and Cherry Scoop

This thread was discussed between 23/10/2014 and 24/10/2014

MG Midget and Sprite Technical index

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