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Ed, Yes there are small differences and quite a number of total variants but the 1.0 and 1.2 heads remain fundamnetally different. The MA09 is different again but IMO should be left alone for genuine MA09 engines which as we all know are now very rare. The best 1.2 head has 18B cast onto it, the...

Heads same piston bowl different

Sorry Fusion, not true

You don't say if its a 1.0 or a 1.2 All Micras bend valves when the belt fails. The heads are interchangeable but the 1.2 is by far the better head performance wise. Compression differences between the 1.0 LC, 1.0HC and 1.2 were all achieved by varying the size of the piston bowl. You must not...

Most likely head gasket area then. The tops of the blocks are poor and usually distort. What happens is that the aluminium tends to sink leaving the cast iron liners protruding a little. On a full rebuild I always skim the top of the blocks and they usually need 5 to 10 thou off to make good. It...

Is that new engine in and running Chris?

Roger's quite right. Compression testing is a dubious art at best - depending upon accuracy of gauge (usually poor), seal to head, cranking speed, throttle butterfly position, amount of oil floating around in ring area, engine temp, etc etc. Your readings are all about same so that's good. 15...

Well maybe someone stuck it with a pin :laugh:- you don't know, nothing should suprise you when advice is asked on an internet forum. I had someone once tell me what was wrong with their engine because the fault had been diagnosed by his brother in law whose best mate once worked for Mercedes...

Compression test won't show up really Frank. A leakage test would if he's got the facility. Bottom line is though there's a problem so he may as well start again' Head off and fully strip Skim flat Machine 1mm off top face of head When re-fitting rocker assembly use an additional washer under...

Hi there Bob ma boy! Yes you can put a 1200 head on the one litre. Physically the same size. No issues with gasket sealing. You use the MA10 gasket (wonder if he did?) Happy new year to you all down there on the fens! See you in the new year - with the Vauxhall, LOL(Y)

White smoke sounds a lot like steam??? You should have skimmed the head before you re-fitted it anyway. These heads do warp a little but they don't crack. What make of gasket set did you use? Misfire is probably a badly seating valve - common issue You only need remove the rocker gear and...

Not true. The inlet manifold is dire! If its the best you've seen, you haven't seen many!

That sounds a lot for that? It should have least had throttle bodies. Why bother anyway? Why not just use a CG10?

So its not a MA10 after all! Its a MA12 block linered to take VW pistons and a 16v Suzuki head fwn (What are MA10 liners anyway?)

Wow! and I bet that's at the wheels as well!:laugh:

That arms a mess Chris but the outcome is better than anyone hoped at the time. I was the "director in charge" at the meeting and was on the scene quickly - met by a senior official telling me "his hands come off"!. Real mess and so pleased you've made such a rapid recovery. My wife racing a...

Without giving his secrets away 'cos autograss manifolds are usually closely guarded secrets, it looks to be mostly an assembly of proprietary parts from Orchard Engineering who are specialists in this area. If he took that set up off and fitted the standard MA12 carb and manifold (ugh!) he...

Ah, that's my pals at Withy then - pinching my colours as well!

Looks like one of my motors Chris? (it is Chris isn't it?) Dave (Y)

Bob's the Micra man. What he doesn't know about Micras! How ya doing mate?