Misfire

mac · Post by **mac** » Sun Mar 22, 2009 4:55 pm

How the hell can it break a cam shaft?? I would have thought that the torque required to such a with would ripped the teeth from the cambelt first??

Mac

David · Post by **David** » Sun Mar 22, 2009 5:10 pm

mac wrote:How the hell can it break a cam shaft?? I would have thought that the torque required to such a with would ripped the teeth from the cambelt first??

Mac

My thoughts too - sure it's not a cam shaft bolt failure! Seems this is not unknown on the inlet side after a cam belt change! There was a recall on early engines over this and apparently can still occur if bolts are reused.

BiggestNizzy · Post by **BiggestNizzy** » Sun Mar 22, 2009 8:07 pm

David wrote:
mac wrote:How the hell can it break a cam shaft?? I would have thought that the torque required to such a with would ripped the teeth from the cambelt first??

Mac
My thoughts too - sure it's not a cam shaft bolt failure! Seems this is not unknown on the inlet side after a cam belt change! There was a recall on early engines over this and apparently can still occur if bolts are reused.

Didn't this happen to Ro55 ?

fd · Post by fd » Sun Mar 22, 2009 8:21 pm

Not the first time I've heard of this . . . sh1t happens, things break . . .

Fd

johncam · Post by **johncam** » Sun Mar 22, 2009 9:06 pm

Seems it's not unknown and does happen...

http://www.aronline.co.uk/index.htm?blogs200708f.htm

(scroll down to the 17th August under the picture of the MG ZR).

I'll ask Ali to take a picture of the broken cam shaft when he gets it out the car.

Cheers,

John

Post by **Shug** » Mon Mar 23, 2009 12:42 pm

Sh*t...

Mine is sitting on Woody's drive with a hellish misfire - was mucking about trying to get a throttle linkage sorted out, ran out of time and started it up to drive home. Sadly the throttle cable was snagged up and it shot to the limiter as soon as it caught.

Now misfiring like a bustard - although it's running on 3, not 2 - I'd imagine that the inlet cam farking up would kill 2 cylinders, no?

David · Post by **David** » Mon Mar 23, 2009 1:15 pm

Shug wrote:Sh*t...

Mine is sitting on Woody's drive with a hellish misfire - was mucking about trying to get a throttle linkage sorted out, ran out of time and started it up to drive home. Sadly the throttle cable was snagged up and it shot to the limiter as soon as it caught.

Now misfiring like a bustard - although it's running on 3, not 2 - I'd imagine that the inlet cam farking up would kill 2 cylinders, no?

Ouch!

High RPM from cold start - IMHO I'd be 'hoping' it was a damaged/stuck valve

.Compression test is the way forward I think

Post by **Shug** » Mon Mar 23, 2009 4:34 pm

Scottish Elises

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