About a year ago i bought a 1968 morris minor that had a replacement engine fitted. At the time i neglected to ask if the engine had an unleaded head. I have been unable to contact the previous owner as he has moved house.
My question is, is there any way that you can tell whether an engine has an unleaded head ?
unleaded head ?
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JOWETTJAVELIN
- Minor Legend
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Re: unleaded head ?
Not without taking it off and checking the valve seats.
What are you using the car for? Pottering about or regular high-speed journeys?
The only additive I use is 2-stroke oil mixed to a ratio of 1:100 with the petrol which will do much more good than any quack LRP solution.
What are you using the car for? Pottering about or regular high-speed journeys?
The only additive I use is 2-stroke oil mixed to a ratio of 1:100 with the petrol which will do much more good than any quack LRP solution.
Re: unleaded head ?
NO NEED for an 'unleaded' head - just set valve gaps to 12 thou inlets and 15 thou exhausts - and check/reset every 3000 miles. No need for any additives - although no harm in the 2 stroke oil - I know a lad who swears by it for his Pug diesel...
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rayofleamington
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Re: unleaded head ?
I wouldn't use a quack LRP additive either.
If you're going to use one, make sure it's one that was proven to work! Some of the ones tested were next to useless.
How many miles will you be doing per year? If you're doing a lot, then you stand more chance of getting a problem (it needs a lot of miles).
Carry on without an additive and if you get no problem, don't worry! If you do get a problem, then you can worry about an unleaded head, but by that time you might have saved up for one.
If you don't like the other options, use an approved additive and don't worry about it.
If you're going to use one, make sure it's one that was proven to work! Some of the ones tested were next to useless.
How many miles will you be doing per year? If you're doing a lot, then you stand more chance of getting a problem (it needs a lot of miles).
Carry on without an additive and if you get no problem, don't worry! If you do get a problem, then you can worry about an unleaded head, but by that time you might have saved up for one.
If you don't like the other options, use an approved additive and don't worry about it.
Ray. MMOC#47368. Forum moderator.
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Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
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tommybhoy2405
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Re: unleaded head ?
thanks for the advice guys. i dont do high milage so in the meantime i will stick to the addative i have been using.
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Bryan Charlewood
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Re: unleaded head ?
If there is a small round sticker on the back of the cylinder head this will confirm that it is unleaded.Bryan
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katy
- Minor Legend
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Re: unleaded head ?
So if I put a small round sticker on the back of the head, will that automatically make it "unleaded" 
?
?Talk slow, think fast!
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catswhisker
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Re: unleaded head ?
'Small round sticker' at back of head may be a temperature sensor that could give evidence
of overheating and invalidate a warranty claim.
of overheating and invalidate a warranty claim.