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12G1963

VALVE GUIDE IN CAST IRON

That tell tale puff of blue smoke when you first start is an indicator of worn guides or seals. Valve guides should be replaced with every valve job.

Sold individually, these are the original quality Cooper S guides for use in any head especially with chrome stemmed valves.

Also suitable for any of our plasma or heat treated competition valves when using unleaded petrol.

Not for Turbo exhaust valves as they have a 8mm internal diameter.

Should sit 0.550"from top of guide to valve spring seat.

Internal bore size after fitting should be about 9/32th (0.2812") but with modern day valves 0.2799" to-0.2804" is fine.

As most of our EN214N race valves are heat treated they can be used in these cast iron guiides which dissipate heat quicker than bronze but exhaust valves should be given a little more clearance.
  • £2.64 exc vat
  • £3.17 inc vat

 In stock

 
help Recommended usage 8 x 12G1963 to fit one mini.
See details below of where 12G1963 is used in AKM manual.
 
Cylinder Head 850CC, 998CC & 1100CC Pre 'A' Plus - Qty 8

997CC & 998CC Cooper Cylinder Head - Qty 8

Cylinder Head, 998CC, 'A' Plus 1980 on - Qty 8

Cylinder Head Cooper 'S' 970CC, 1071CC & 1275CC - Qty 8

1275 Except Cooper 'S' & Turbo - Qty 8

Cylinder Head 1275 Turbo & Heads with Triple Coll - Qty 8

Cylinder Head - Qty 8

 
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Cylinder Head 850CC, 998CC & 1100CC Pre 'A' Plus

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Classic Mechanical Parts Manual
997CC & 998CC Cooper Cylinder Head

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