MX-5 OC Forum

Guy's anyoine used the eastern regions SST before?  I don't think they have.  Unless I am mistaken the fitting bolts are about 10mm short, supplied = 35mm need to be 45mm (Minimum) - 55mm. The rocker box bolts are 45mm and would grip thread by about 5 mm but they have an 5mm unthreaded tip which means they won't do either.  Anyone in Haddenham/Ely area got any longer bolts they could drop off as I was hoping to get this completed today?

I've tried 4th gear and foot break, too springy

Cheers guys really stuck and no one home to home the foot break?  

Paul

07411 480158

I always use the `coil of cord` in cylinder method of locking the crank, works every time

Dr. Eunos

Not sure I'm familiar with this method. Would you mind explaining or giving me a quick call and talking it through?

Paul

07411 480158

Do the 35mm ones not screw into the front pulley at all? Have you removed the aux belt pulley?

Dr Eunos said that there is a washer with a dowl in it,  But I.ve got a tiny inspection mirror up close and it doesn't look like there is a washer. I wacked it a few times to free of any rust behind any washer.  

I have removed all the belts etc.  The fly-wheel has two pully rings, alternator and power steering, these do not appear to be splitable.  It just feel like the bolts are 10 - 15 mm too short. The provided bolsta re the correct thread etc and screw in fine without the SST. If your passing through and fancy casting an eye I promise you won't get your hands dirty.

Paul

07411  480158

With the 4 6mm bolts removed the 2 aux belt pulleys will come off as one piece, they will be tight. You'll be able to get the tool on to what's left. I have longer bolts at work if you can wait until Monday. I'll have longer bolts at work if you can wait until Monday/Tuesday. I'm busy all day tomorrow.

Thanks for the advice.  I will try this tomorrow after some training I have to go through with Scouts.  The two pullys seem to be fitted to the inner sleeve and a rubber O ring or obsorbtion color. Is this an O riing/dirt ring?  I was worried in case this is not a ring but one of those freeze collers like a bush is manufacturered were the rubber is frozen in nitrogeon inserted and allowed to worm and exband to an impossibly tight fit.

Will the timming disk behind come off with the pullys? Will this be damaged in I use a coupe of hub/fly-wheel pullers?

Much appricated.

Paul

The timing ring comes off too. You'll have to take care not to damage it. The pulleys will come off separate to the timing ring. Have you seen the How To guide in the download section here? The tool I'm using there has the longer bolts but it shows how it comes apart.

Thanks for the heads up on the difference in bolt length, I'll put a set of longer ones in with the lock tool from now on.

Finally got the bugger off.  Managed to get on with it a bit today but could spend too long.  Camshaft and Crank seals renewed now to put it back together tomorrow evening.  Hopefully be able to use it for Tuesday club meet otherwise anyone free to give me a lift?

Paul

That is an inspired idea! however i would be a little concerned that if the rope/cord bunched up on one side of the piston it coud force the skirt of the piston against the cylinder wall, but as it's not rotating i don't think it could damage it??

Well done!! 

Alas, not my idea was taught to me by my respected pal Andy Murdoch ex MX5 racer (and ex REME) at Avia Speed Shop in Bridgend, I was a bit sceptical at first then he reminded me what kind of force acts on the piston when the mixture goes bang  works for me

Just fitted this 50thou skimmed head (+ exintake cam mods and verniers and all new hoses) using that method, its lovely!

Back to dyno on Saturday to finally tweak the cam timings and see what it gives, he is getting an extractor exhaust manifold and custom Powerflow made exhaust system soon, should `fly` a bit then....

Dr. Eunos

taff eunos:

 I was a bit sceptical at first then he reminded me what kind of force acts on the piston when the mixture goes bang  works for me

Dr. Eunos

Surely if your mixture's going bang it's detonation.....

Sounds like you need that Dyno quickly!

What I mean is the rise in cylinder pressure is very sudden and far more violent (even in a correctly timed engine) than gently raising the force on the piston by turning the crank bolt with a breaker bar....

Todays` dyno session at `Got-Boost` in Bridgend went very well, so far we have seen a full 10% raise in torque right across the rev range and Craig rekons the power gain is looking like heading for the 15-20 bhp we were aiming for so we are very pleased with the result well worth the effort

Dr. Eunos