18 replies to this topic

[CityEPete]

I've been using additives in old cars for ages, it's no biggie.

[mab01uk]

As said you only need to swap the cylinder head or upgrade the existing cylinder head by fitting hardened valve seats to go unleaded..........no one in their right mind would replace a perfectly good engine completely just  to go unleaded!

[Midas Mk1]

Castrol Valvemaster, simples.

 

Both my Minis came from the factory unleaded, (even an MPi),  both now have valve sizes  that are too big for unleaded seats , so just bulk buy valvemaster plus. Even includes octane booster too which is useful for their High C/R/

Edited by Midas Mk1, 17 August 2017 - 06:49 AM.

[ACDodd]

Valve seat inserts are the way forward. You'll also get a power increase over your old head as the valve seal will be restored during the head rebuild process.

Here are some insert machining being performed on a 1098 Morris minor head;

Attached Files

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Edited by ACDodd, 17 August 2017 - 12:48 PM.