well this is a big F*U$K up!
Turbo Mini Forums

thought ill get my gears cryo treated & shot peened.

you know? try do the box right make the car last.

got them cryo treated all good got them shot peened.

looks great..

one problem.

the stupid prick shot all the Molybdenum coating of 1,2,3,4.

gears are scrap now.

won't take blame for it.

off course both are pointing the blame at each other & im out of pocket for a new set of gears & the shot peening guy wont refund saying his work is perfect.

he is right cocky saying i'm a metalurgical Engineer blah blah you can't tell me how to do my job.

mind you i have been nice as pie sickening nice to try get my money back & more if i can.

im so pissed off.

i just hate how a business can slip through with this shit all the time, i have been diddled a few times now.

mega jolt harness from uk has never turned up, the bloke wont reply to my countless emails.

im sick of it so many bad people out & about it spoils it for everyone.

im not sure what to do really, but im so upset as it's cost me $600 Au to get these gears done & they are trash.

the cryo guy said he will get the gears checked for free to determine what did it & if it was the cryo he will pay for new gears & refund me but he said he is 100% sure cryo has no effect.

he also told me to send an old gear down & he will cryo it to see if the moly comes off.

don't bother shot peening you're gears as they will screw them up.

now another lot of new gears!
:(

Edited by NickG on 8th Sep, 2010.

Oh Poop!

If something is worth doing, it's worth doing half of.

yes John Inded :( i was really hoping i would do this amazing thing & everyone would be!

wow it has really helped nick is doing blah blah no problems & push forward we can do this box this way & run more of this or do that etc but nope.

well i was doing it for my self but you get the drift ha :p

stung.

Edited by NickG on 8th Sep, 2010.

Was it SD mini's?

If something is worth doing, it's worth doing half of.

Can't they be re-coated?

Shot peening is not shot blasting so why did it remove the coating ???

Either the coating was crap or he/she was doing something more aggressive than peening.

But I would ask why the cones weren't covered - something as basic as duct tape before the peening - and assuming they were off the mainshaft, how were the internal surfaces protected ???

Schrödinger's cat - so which one am I ???

ROD S

all i can say is my box was perfect & the rings were new the whole lot was rebuilt!!!! even though it was fine it's a japan front cut 40,00 kms Efi!!

i did 10,000km wanted to go faster usual. it was all new new new.

decided to supercharged & upgrade the the lot do it right the first time.

now look where it has left me.

the surface where the moly was, is is now very rough & bumpy looking was not like that before.

it was smooth & the rings would grip up, now they just keep slipping spinning on the end of the gear.

you send a perfect box away, you expect it to come back the same.

reapply the moly who knows. can they? i'm told you the need to have facilities to regrind the surfaces to original dimensions. then coat.

i would love to have my gears working.

in the end why the hell should i even need to be going through all this.

wish people could get it right the first time & be man enough to say ok i mucked up let me fix the problem.

i have called around all day no one in australia seems to have an idea.

this is all i can find, interesting read though.

http://savetheminis.com/Automobile%20Engin...%20Synchros.pdf <-- this explains the moly coat kinda..

Edited by NickG on 8th Sep, 2010.

The Moly coating got there somehow in the first place, there must be a way of putting it back again.

And on the 7th day........... God created turbochargers!

Can you strip and coat some gears for me??

The shot peening I was involved in was done with glass beads, thse were likike micro marlbes and were a one shot use.applied useing a water jet. the surface was baby bottom smooth but a little duller and thats on aluminium alloy components, steel and other exotic patrs so ifit roughed the surface he has used the wrong media to do the process!

Own the day

Queensland metal spraying has done it for us in the past, many times, & they`ve all been good,,,still in the cars & still going well from years of service in fact

www.miniman.com.au

"""LazyGoodForNothingSmartArseKnowItAllBackYardMiniMechanic"""

i feel for you and agree it is annoying and very very frustrating and is something that we here time and time again. there are a few reliable companies and people out there, i think we are lucky to have TM who can provide good advice and recommend reliable companies and people.

Well new gears on the way!

Hopefully not to much longer to get my car going.

Just wish the bloke would say ok I made a mistake.

Ill refund you.

what spec did he shot peen them to??? there is no way shot peening gears at the correct intensity would strip the moly off?

moly is a absolute shit to get off by blasting anyway, not impossible, but very difficult.... moly is also known as sprabond, and it bonds very very well....

its what all the formula one teams use for their traction control plates, and clever clutches for starters etc.....

anyway, i digress. Nick, ask him what shot he used and what intensity he peened at......

And on the 7th day........... God created turbochargers!

Is it possible the cryo treatment destroyed the moly bond ???

Even so, it doesn't answer why the moly cone surfaces weren't protected during the shot peening of the gear teeth.....

Schrödinger's cat - so which one am I ???

Nic, it can be done, but doing a couple off would be hideously expensive, (like more than a new gear sort of expensive). On the other hand if you're not in a rush then i might be able to chuck them on the back of the next lot we do? no idea when that will be though?!

And on the 7th day........... God created turbochargers!

And on the 7th day........... God created turbochargers!

Schrödinger's cat - so which one am I ???

Was the Megajolt harness from SD Minis?

he is a metalurgest, does loads of race stuff as well, he does know his stuff.

his work on the gears are great but he made a mistake & is passing the blame on the cryo guy & my gears were stuffed before i sent them him was a new one!

i was told buy another company who gave me a first quote, they have to be capped over that part of the gears, tape is not good enough and they were pretty pricey so i went with this other bloke.

when i expressed my disserpointment & that perfectly working gears are not working & i think the peening may have not been done right.

he got on his high horse, how dare you tell me a metalurgical blah blah how it's done.

he said there is no moly on the tape he checked, but the synchros wont grip at all & freely spin, i can't see any coating just a rough looking shiny but dull surface where the coat would be.

i will ask him what peen & shot he used.
he said he masked up all area's & his words were.

in my mind i did a proper job & im not responsible then blamed it on the cryo.

it's obvious its the peening, i was open to his suggestion talked to the cryo guy also & he also gets gears made for loads of people & cryos for military.

i spoke to them all & they told me it is imposable for cryo to remove the moly.

he offered me a full refund & to re cryo a test gear to prove a point & re cryo my new gears free of charge.

good business man.

Edited by NickG on 9th Sep, 2010.