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Cylinder Head Question


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#1 plumbo1

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Posted 02 December 2019 - 07:08 PM

Hi all, I need some help (again) I have a 1974 mk3 1000 that was a complete rust bucket nearly done bodywork floor boot roof etc  I've now taken engine apart and found no1 cylinder has bad pitting took to have a rebore and they found a hole in no3 bore so needs reline, they couldn't do anything with the head as it was to far gone so brought one of eBay that was supposed to be a 998 A series but the only marks I can find are cam4810, 20A1, Z, and a B can any body help identify this head and can I fit this straight on the block without any mods, Cheers :highfive:    



#2 whistler

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Posted 02 December 2019 - 07:20 PM

Standard 998 head, later variety. Might be cheaper to dump the block and find a better one.



#3 plumbo1

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Posted 02 December 2019 - 10:16 PM

thanks whistler, i triedto find a block but mines a auto and the manual block does'nt fit i found a A+ block but even that was a lot different so I've had the block done £320, Cheers



#4 Miki Leyland

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Posted 04 December 2019 - 07:31 PM

cam4810

 

That's the standard head used in 998 A+ Minis. Could be leaded or unleaded depending on production year, if I'm correct.


Edited by Miki Leyland, 04 December 2019 - 07:31 PM.


#5 cal844

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Posted 04 December 2019 - 09:37 PM


cam4810


That's the standard head used in 998 A+ Minis. Could be leaded or unleaded depending on production year, if I'm correct.

You are indeed correct, the only way to check is to remove valves

#6 MiniMadRacer

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Posted 05 December 2019 - 09:24 AM

I must admit I have used "leaded" heads with no adverse valve seat issues. Possibly because the heads are old and have a "lead memory"  or due to the fact that I do not rev the granny out it constantly (road car) and I do not do a humungous amount of mileage. I have never worried on a road car whether a head is leaded or unleaded, and I may have been lucky but I have had no issues



#7 whistler

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Posted 05 December 2019 - 12:17 PM

thanks whistler, i triedto find a block but mines a auto and the manual block does'nt fit i found a A+ block but even that was a lot different so I've had the block done £320, Cheers

Just for information, the crank, rods and pistons are the same as a manual.



#8 plumbo1

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Posted 09 December 2019 - 02:28 PM

wish i had known that it would have saved me a lot of cash I still got to bye pistons the one that were in the block are well knacked, I was told that the crankhousing and the depth of the oil pump was allso different, Is it all right to use the A+ cylinder head on my A series block or is there any thing I should do to it before I fit it :tumble:



#9 gazza82

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Posted 09 December 2019 - 05:12 PM

Is it all right to use the A+ cylinder head on my A series block or is there any thing I should do to it before I fit it :tumble:

 

Straight swap .. but might be worth checking it is flat using a straight-edge/steel rule



#10 plumbo1

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Posted 10 December 2019 - 03:48 PM

Cheers gazza that's great will update as soon as engine reassembled :highfive:  






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