A7 rollerisation

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

Hi Pete, Gregg

can you tell what kit is needed for:

These are my engine No. : A7 011511 , and chassis No. ZGULPR007AM111388. Is there anyone who can pull this info for me, if possible?

thanks Pete, know you are on holidays but for someone like you it might be quite easy (now ducks for cover and owes another beer or two)

Thanks Gregg a beer I might owe you too - depends who responds quickest!

GRiSO Capo Posts : 10198 Join date : 2013-09-30

Have you gone and bought yourself an 8V Sport, Tony?

Surprised

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GRiSO Capo Posts : 10704 Join date : 2013-05-29 Age : 67

What bike and year model Tony?

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

2010 Sport with A7 engine, Pete

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

Snot mine but I contact I got in Macedonia - can't get any sense out of his dealer - blinkers i think

GRiSO Capo Posts : 10704 Join date : 2013-05-29 Age : 67

2010? It'll be a 'C' kit I think. Just ask him if the rocker covers have the 'O'-ring seal around the long plug tube or the thick neoprene gasket that goes between the cover and the rocker carrier/cambox casting.

If it has the early type with the o-ring it'll need a 'C' kit. Later type needs the 'D' kit. Unfortunately none of the Sports ever had the shims installed at the factory so either kit is a 'Heads Off' fitment job.

Pete

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

Awesome, thanks Pete. I'll let him know.

Don Abbondio Posts : 3 Join date : 2016-09-09

Now let me preface this by saying there are far more experienced heads on this site than mine.

However I am of an age of BDA and twin cam Fords. I know they were cam operated buckets onto valves.
The similarity in the issue MG is haveing is very similar to the problem we used to have with Fords. And it all came about through the profile of the cam and the radius of the curve on the Camshaft. In Auz. at that time cam grinders could not grind a cam with the correct radius, they were ground in UK. Now the question I ask is the toe of the rocker arm ground to copy the 4v engine or is the 8v a different profile, this could cause the issue.
There has to be some serious " Binding" in the valve train to cause all this damage.
We discovered the problem by assembling the engine with very light springs on the valves and then " Blueing " the rocker arm and cam profile, if the Bluing is wiped off either surface that is the issue.

Just some " Old Fart " technology!

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