Cylinder head

Post by **alzax3** » Fri Aug 29, 2008 6:23 pm

In amongst a pile of spares I got with our Traveller was a cylinder head that the seller said was a from 'Mini'. I was looking at it today and noticed that it was cast without provision for the waterpump bypass pipe, and it looks to have inserted valve seats. Does that make it an unleaded head? is there any way of identifying it from its cast in numbers? (8A7 next to the thermostat housing, CAM4813 in the centre of the rockers) And what about capacity - is the head the same for all CC's with the difference in the bores or are the heads different too?

There - a whole pile of questions really

but perhaps I'll have to join a Mini forum to get the answers?

Post by **Kevin** » Fri Aug 29, 2008 11:26 pm

is the head the same for all CC's with the difference in the bores or are the heads different too?

No the heads are different to match the bores otherwise the gases would have a nice step to try and work their way round.

Post by **bmcecosse** » Sat Aug 30, 2008 10:15 am

It's an unleaded head from a 998 Mini. Would be fine on a 948 Morry engine. The chamber capacity does vary from engine to engine. You 'could' use it on a 1098 engine - but the inlet valves and inlet air passageways are smaller than the 12G202 head on a 1098 engine - however it will run perfectly well if it's just for pottering around.

Post by **alzax3** » Sun Aug 31, 2008 7:16 pm

Thanks for that, no, I won't hobble a 1098 with it then, but it's nice to know what it is!

Post by **bmcecosse** » Mon Sep 01, 2008 9:53 am

Good 'unleaded' head for a 948 engine - may be of interest to some on here!

Post by **alzax3** » Mon Sep 01, 2008 6:39 pm

Well, yes - anybody interested?

Post by **PSL184** » Mon Sep 01, 2008 6:40 pm

There is one doing quite well on fleebay at the moment - might be worth sticking it on there?

Post by **alzax3** » Mon Sep 01, 2008 6:47 pm

Good point!

Post by **bmcecosse** » Mon Sep 01, 2008 6:48 pm

Stick it in the 'Sales' section here to give Forum folks first chance ?

Post by **alzax3** » Mon Sep 01, 2008 6:52 pm

Happy to - any idea what it's worth? (no valves/rockers but has the twin outlet thermostat housing) - I also have a brand new Metro water pump to suit (without the bypass tube)

Post by **PSL184** » Mon Sep 01, 2008 7:11 pm

http://cgi.ebay.co.uk/NEW-LEAD-FREE-CYL ... 286.c0.m14

Link to head on fleebay - not the same as yours but might give an idea of what people will pay. Might be nice to offer it out here a bit cheaper first.....? Our 950 had a receipt for a fitted unleaded head when we bought it which cost nearly £300.00 !!!

Post by **bmcecosse** » Mon Sep 01, 2008 11:08 pm

Ahhh - you didn't say 'no valves' before ! To be used 'unleaded' it needs the correct later Mini harder exhaust valves and they have different cotters and caps. Any inlets can be used, but the exhaust bits will add up to a bit extra!