pandoras box
Turbo Mini Forums

well ,
when driving back from pod ,it was all going swimmingly ,and fine, got to about 5 miles from home ,and put in some more fuel ,and set off ,
got to the eynsham roundabout ,booted it away from the roundabout and the engine started a nasty knock and vibration ,this got louder and louder ,and sounded just like a big end..
checked oil pressure, all ok at 45 psi ,and checked coolant temp, alll ok just off the blue as normal hmmm.
gradually the noise got louder and louder ,and the engine started jumping about a bit ,almost like it wanted to run backwards ,very nasty ,my mind ran from dropped valve to big end to drops to blown head gasket, or all of the above !
so gradually it would not take throttle and died, on a sharp bend of course ,so managed to get it into a turning ,and called the aa .
60 mins later a bloody great flatbed turned up and 20 mins later home .
TIRED!
so this morning ill take it apart ,
any guesses ?

Edited by robert on 18th Aug, 2008.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

my guess is there is something wrong with your engine...


thats me out of ideas!! sorry to hear this mate! especailly after it was going so well at avon.

That's really bad luck.

Just one question, why did you spend an hour waiting for the AA? when you could have got a bit of rope & towed it with the Astra?

Look on the bright side time to fit project 25.

Sorry to hear that Robert.

My guess - Your lightened cast iron flywheel is breaking up.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

have you got petrol at that station befour I lost a motor from bad petrol it was a CBR 600 farely well tuned, turned out there was water in the petrol like 50% which only got to the motor on full chat made a nice job of the piston lands iirc top ring broke free

Edited by PaulH on 18th Aug, 2008.

Could be broken crank with flywheel bouncing around? We had similar experience on 2 occasions. First crank broke on the web next to centre main under No3, and second more noisy - broke across the nose. Good luck!!

best of luck getting it sorted

I would start with getting the wok off and have a pull on the flywheel before pulling the engine out.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

eeek , may be a lucky boy !

spot the missing part .....

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Is that the one you adjusted?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

cripes!

Thats odd what valve spring presure you runing

How the fook did you do that?

When you said you've "dropped a valve" I thought you meant like bent one or something.

I think its time to get project 25 on the go again.

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www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

On 18th Aug, 2008 matty said:
How the fook did you do that?

When you said you've "dropped a valve" I thought you meant like bent one or something.

I think its time to get project 25 on the go again.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

that is amazing I would be suspecting a sticking valve what sort of shape is the push rod in.
regards,
Paul.

sore robert just rembered was the shaft ever replaced with a mini spares one I rember AC Dodd having a problam with a mini spares on wher he droped the shaft just befour he was about to assemble the setup and it broke in half after some taught he worked out that the shafts had been hardened to deep making them brittle just a taught,
regards,Paul.

Never seen a rocker shaft break like that - you have been s000 unlucky,probably with a faulty shaft.Did it come from Avonbar,like the rockers? If so they would probably like to know and might even let you have another.

blimey!! yes it was a mini spares one part no ,c-aeg399 ,bought it 25-02-05 .

luckily i have a thick walled one in my spares so ill stick that in , i wonder if it had the same prob as mr dodds ?

paul the push rod is fine , but im going to take out that valve to see .

Edited by robert on 18th Aug, 2008.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

an easy fix after all.lol

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Make sure the replacement shaft is correctly modeled before fitting.

I think there lies your problam Robert here is a link to the topic on MLM

http://www.mlmotorsport.com/option,com_smf...opic,162.0.html
regards,
Paul.

thanks for that paul ,
hmmm jan 2006 for that shaft , i wonder if it was the same batch.
valve was fine ,lapped it in no probs on the seat etc ,so back together tomorrow .

rob your just sick , clove and v rolling thier eyes .bloody funny though .

Edited by robert on 18th Aug, 2008.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Cripes!!!

Its not the first time Ive hear of that failure, IIRC the chap it happened to said it was a Minisport competition shaft.

Looks like the quality of these competition parts is getting a little lax these days now that the genuine parts are becoming harder to get hold of.

Did anyone get to the bottom of the layshaft issues and has that also been rectified.

I'm buying as many 998 engines i can find just for the layshafts and now rocker shafts if they are still in good nik