Just wondering if any one can give me some info on fitting the corolla rockers to my 1380. Just wanting to know what needs to be removed, Do I need to loosen all the head bolts?? Also should I have any trouble with the springs binding or not, I am running double valve springs but can not remember what length ect as I rebuilt the engine over 8 years ago. Alsomdo I just run the same tappet clearance as I do now.

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A Bloody Mini

1970 Mini K, 1380cc, 1.75 HIF SU, 30 70 Cam, 2" Zorts
1969 Mini K, Stock Standard and Orginal. (Slow as Hell)

OK I have made & fitted a few sets of these.
1. Drain a bit of water out so it's below block level, then undo the 4 rear headbolts only. Retorque them ALL in sequence when completed. 9 times out of 10 this works with no head gasket leakage.
2. Coil bind depends how wild the cam is, all you can do is try it. I got away with Cooper S springs on Barney's 1293 (Wade 104 cam & S springs). Slacken all the rockers first before fitting. Check you have at least 1mm between the spring coils @ full lift. If not you need new springs, GR and I use C-AEA526 ones which are good for .495" lift and ~8000rpm max.
3. Set the rockers to +.003" on whatever you had before. So eg. for a Kent or GR cam which usually run @ .016", set to .019".

Enjoy...

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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.

Check also the angle of the rocker at the push rod end, if the adjusters need to be backed off along way you may need spacers under the rocker posts, this depends on how much the head may have been skimmed.

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Now with 2 extra ports!