18 replies to this topic

[Sag]

Hi all,just wondering if any one can help please as don't want to have problems with my engine,I've got an 1982 998cc mini and was wondering if it will run on unleaded or do I have to buy some sort of treatment please,my engine number is 539793 if it helps,will be so greatful for any help.

[nicklouse]

most likely need a lead replacement additive.

 

but we would need the full engine number to have a better guess.

[Sag]

Thank you for such a quick reply I'l have a look and get back to you as soon as I get home.
Thanks again.

[Sag]

most likely need a lead replacement additive.
 
but we would need the full engine number to have a better guess.

Hi there,the engine number is 99H791PZ539793 and thanks again for this so much appreciated.
Oh and forgot to ask what's the best additive to use and where from,sorry for been a pain but just so many about and not sure,

Edited by Sag, 12 October 2016 - 03:33 PM.

[nicklouse]

some info from another thread
 

 

Guide to Engine Numbers

Eventually i'll build this into a guide to Mini and Metro engine numbers. Telling you what they mean, how they break down and which mini's and Metro's have equivalent engines.

So far though here's a list of engine number prefix's which are compatible with unleaded petrol. It is only the head that is different, so you can use this information to source unleaded heads from breakers for your mini.

Here is a list of unleaded engine numbers for the 998cc engines.
99HF15, 99HF32, 99HG30, 99HG31, 99HG32, 99HG33, 99HG34, 99HG39, 99H/D81P, 99H/E20, 99H/E21, 99H/E22, 99H/F16.
All the post 1990 1275 mini engines are unleaded compatible, many of them have CATs so can only use unleaded. None of the pre 89 engines, or sizes other than 998 and 1275 can use unleaded, with out modification. Information Received from Barrett''s MG-Rover, Folkestone.

 

yours is leaded. as you are in Town use the local Millers stuff.

Edited by nicklouse, 12 October 2016 - 03:39 PM.

[Sag]

Thanks yet again Nick for the info,il have a look at millers now

[nicklouse]

no probs Mr Gledhill.

[Sag]

Where you based Nick

[nicklouse]

was based in Holmfirth many years ago.

[Sag]

So my end of the woods then lol

[Midas Mk1]

Castrol Valvemaster plus is recommended, the additives usually work out cheaper online aswell. 

[nicklouse]

So my end of the woods then lol

Indeed. Netherthong and Brockholes.

[CedricTheMini]

Thought I'd jump on this thread rather than start a new one. I have just brought a 1986 mini city E, so guessing its likely to be leaded fuel if the head hasn't been changed. My question is, is there anyway to tell if the head has been changed? also would there be any issue adding a lead addiative to be safe if it was in fact an unleaded head?

 

Thanks

 

Mark

[nicklouse]

Thought I'd jump on this thread rather than start a new one. I have just brought a 1986 mini city E, so guessing its likely to be leaded fuel if the head hasn't been changed. My question is, is there anyway to tell if the head has been changed? also would there be any issue adding a lead addiative to be safe if it was in fact an unleaded head?
 
Thanks
 
Mark

no way without taking it off. Well not cause issues.

[hhhh]

Lead won't hurt your head, but it'll kill a catalytic converter. I've been running vintage vehicles since lead was removed from gas and never used an additive and never had a problem. No signs of seat erosion have ever happened beyond normal wear. I think this issue is a little overblown. If you're worried, keep an eye on valve clearances; if they start tightening up, you're getting erosion.