engine and drivetrain More Engine Woes...

[Parkertii]

Dropped a damn piston. Does anyone happen to have a set of 74 tii piano top style pistons for a E12 head that would be willing to sell?

Here is the image.

[M3M3]

hard to tell.  is that just scratched or dented?  saveable?

[Parkertii]

No, its toast. look at the bottom of the piston. a chunk broke off

[TobyB]

Ouch!   Why machine shops have rubber mats on the floor in the assembly area.

 

I have caught things like that on my foot...  all those years of hackey sack have saved 

at least 2 or 3 things that would have been expensive.

 

t

[Parkertii]

yep, its been a learning experience for sure. Im not so worried about the cost, i just hope that i can find a replacement set! Let me know if anyone has any leads on finding some.

[Parkertii]

Here are more pictures of the pistons that I need.

[Napes]

If you don't come up with a set on this side of the "Pond", you might contact Walloth & Nesch in Germany and see what they can provide.

 

www.wallothnesch.com

 

I hear nothing but good things about them here on this board.

 

Bob Napier

[Harv]

I have caught things like that on my foot...  all those years of hackey sack have saved 

 

at least 2 or 3 things that would have been expensive.

 

t

 

HA! You just dated yourself!

 

John

[FB73tii]

Bummer, sorry to see. I have one 89.47 piston of that type, but it's too large for you. I also have a set of 90mm E12 9.5:1 pistons (cast, IE) in excellent shape, but then you'd have to bore the block. You could probably get away with squaring off that broken edge and running as is (race pistons have even shorter skirts than what you would be left with), but then that would throw off the balance as well. Hopefully someone will have a single piston sitting in their basement for you. --Fred

[ray_]

I guess he could square off all 4 the same way/weight.

 

:-)

 

Cheers,

 

 

Bummer, sorry to see. I have one 89.47 piston of that type, but it's too large for you. I also have a set of 90mm E12 9.5:1 pistons (cast, IE) in excellent shape, but then you'd have to bore the block. You could probably get away with squaring off that broken edge and running as is (race pistons have even shorter skirts than what you would be left with), but then that would throw off the balance as well. Hopefully someone will have a single piston sitting in their basement for you. --Fred

[FB73tii]

I was thinking that. Apparently there was an article in the BMW CCA Roundel some years ago on building a low-budget M10 race engine and just cutting off all the skirts. I would not go that far, but when I had a broken skirt at Watkins Glen a few years back Roy Hopkins (for those that don't know, engine builder and 3-time Targa Newfoundland winner is his 2002 with Adrienne navigating) suggested I could run it as is and be fine. However it turned out I had other internal damage (oil pump shaft broke at 7000 RPM and the nut bounced off the crankshaft all the way back and took out 3 pistons) so did a full rebuild instead. --FB

[M3M3]

 

No, its toast. look at the bottom of the piston. a chunk broke off

LOL...the break is such a nice arc it looked like part of the design!

[Hans]

Well Mlytle, you need to watch more skirts.

[TobyB]

 

HA! You just dated yourself!

Yeah, it's really not that much fun.  Conversation tends to be pretty one- sided...

 

I think this is an excuse to go all- out and rebore and use new pistons.  That one looked a bit scuffed, anyway...

 

heh

 

t

[Parkertii]

thanks to rob at 2002haus for helping me out on this. I have never met him in person and he supplied me with a set of pistons. Awesome guy. Ill make sure to be much more careful this time around