850 Destruction

[dapleb]

Aha good find dabbers....well I really should get on with that very slow build...7years on and in a few more I will hopefully get back to it!!!

[dablik]

Good man, iffin ewe shud nead azzistunce pleas ask

[dablik]

Oh dear.............Rotor + Angle grinder   :isurrender:  think we saw that coming, was going so well until it did'nt... calmed down a bit now, that's just put paid to me Motogadget solid state electrics then   

[peter-may]

What rotor are we talking about here fella? I know what an angle grinder is! ;-)

[dapleb]

Piccie?

[Studley Ramrod]

You tease !   What happened ? 

[dablik]

You tease !   What happened ? 

 



 

Moment of inattention amidst the sparks, think i was getting frustrated with it...

[attachment=o12127]

 

In hindsight i should of gone about it a bit different, should of cut the back off the top half for better access above the  taper really. Slightly bigger disc would of been more helpful but that means another grinder.

[attachment=o12128]

 

Think that'll be getting binned.

 

Should leave well alone sometimes eh.

This post was last modified: 17-06-2019, 09:30 AM by dablik.

[Studley Ramrod]

Ooops. Yeah, looks a bit too damaged to re-use eh.

 

Dunno if a repair could be done though, some clever engineer out there might weld it then grind it down for ya ?

[dablik]

Ooops. Yeah, looks a bit too damaged to re-use eh.

 

Dunno if a repair could be done though, some clever engineer out there might weld it then grind it down for ya ?

 

Dunno matey, been having a read about and a weld repair appears to only be a fix short term as it's a "soft" repair, JB weld has been used with some success but that shaft will get pulled every which way under load, ya know wot i'm like so guess it will be replaced, i knew going in i would likely have a few screw ups and while not happy about the cost to replace it's offset somewhat by not being on the road, ho hum, back of the class for me

[dapleb]

Cock badgers!!!!!



Keyway ok? Crank snout not sealing oubt? Hmmm.



Do you gots new rotor dabbers or do I need to pull you (one) off?

This post was last modified: 17-06-2019, 10:15 AM by dapleb.

[dablik]

Bit chancey i spose daps, keyway is further back on the taper in the pic, also i think it would play with me head no end iffin i put that back in, it's a mega fook up but being the stubborn git i am just had to have a go.

 

Not replaced the rotor yet matey, so you could pull one off for me  

[dapleb]

I will pull one off for you anytime you loike!! May even make a proper indestructatool fur the job.

[dablik]

I will pull one off for you anytime you loike!! May even make a proper indestructatool fur the job.

 

let's hope i wont have to borra ya indestructatool in the future huh....

 

Was hoping for a new future rebuilding tdm engines

[Studley Ramrod]

Cock badgers!!!!!



Keyway ok? Crank snout not sealing oubt? Hmmm.



Do you gots new rotor dabbers or do I need to pull you (one) off?

 

Yup. There's not much force happening where the cuts have been made, just rotational forces.  Weld repair would basically add the metal back to the crank and make it balanced.  Might be worth at least asking an auto engineering bod what he/she thinks as it'd save ya messing about sorting out new shells for a different crank.  And, no potential risks of buying a used crank.

[dapleb]

Don't be too quick to bin dabbers. The snout ain't doing much, it snot interfering with oubt so just need to make sure it don't make any significant balance diff, which I'm guessing it won't. Hmmm

[dablik]

Righto chaps wont bin it, will find a spot furrit for now and attack it again sometime, perhaps when burr bits arrived for the die grinder, got some for the dremel but it's shoite, motor heats up quite quick, hence the angle grinder coming out, oh and i've pulled the trigger now.

 

It's just the Hmmm daps, can you imagine finishing only to find it wont stay put, oh i would'nt sleep again.......ever, not doubting your or Ian's know how as it's much more than mine but it would really make me crazy to redo the engwin and find an issue with the rotor at a later date, of course by then i'll be an expert :unsure2: but would rather pay the price now than the same price later for all the gaskets if i have to re-do, catch 22.

 

Now you know why the threads titled "Destruction" instead of rebuild.

This post was last modified: 17-06-2019, 05:34 PM by dablik.

[wicklamulla]

Cliff we must be related as i can be a brutal so & so when it comes to repairs too! Is that the rotor that inflicted the breakage on the pullers?

[dablik]

Cliff we must be related as i can be a brutal so & so when it comes to repairs too! Is that the rotor that inflicted the breakage on the pullers?

 

The very same Ken, it's quite awkward using the grinder on it, but i am a bit hamfisted an all...

[dablik]

A few more hours on the job, nasty doing this one by hand in increments of size, anyhoo that's the three snapped exhaust studs drilled out and all 4 tapped ready for a 2.5D helicoil.

[attachment=o12132]

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[attachment=o12135]

[dablik]

Spent hours today cleaning every bolt hole thread on/in the engine by hand with a tap, glad that's over.

 

 

Iffin you remember back in the thread i mentioned shim buckets/valve lifters and how 2 different colours are available fo rthe mk1, Red and Blue, after perusing the interweb it seems that the difference (in the thousandth's) is diameter size, however i've also come across what appears to be a colour match in the head which relates to the bucket colour for each respective valve.

[attachment=o12138]

 

It's a little hard to see specific colours in the pic, also because they have faded over the last 28 years but considering only Red/Blue are available it's not to difficult to see which is which closer up ! (some yams apparently have yella/blue or black much like bearing sizes) on the exhaust side you can see four spots of paint, which look like Blue Blue Blue, Red and that's the case bar one bucket showing no colour (Red).

[attachment=o12139]

 

And on the inlet side are six spots but difficult to see in the pic, a couple were in different places but i assume that may of happened during a shim change at some point and one bucket again without a colour, will get around to measuring them soon.

[attachment=o12140]

 

And this arrived from France today

[attachment=o12141]