ausmini
https://www.ausmini.com/forums/

Backwards piston what the?
https://www.ausmini.com/forums/viewtopic.php?f=2&t=62089		 Page 1 of 1
Author:  jester99 [ Mon Mar 29, 2010 5:54 pm ]
Post subject:  Backwards piston what the?
Pulled the engine apart on the weekend and discovered an incorrectly fitted piston! one piston is fitted backwards

Image

i should be able to just turn it around on the conrod cant i?

Jason 8)
Author:  drmini in aust [ Mon Mar 29, 2010 5:58 pm ]
Post subject: 
Yeah just turn it around on the conrod.
It's a wonder the motor didn't rattle, as the gudgeon pins in these pistons are offset to one side.
I know Fiats rattle when you get 'em the wrong way round. :lol:
Author:  Morris 1100 [ Mon Mar 29, 2010 6:13 pm ]
Post subject: 
Are you sure it is only one piston the wrong way around and not three? :lol:

Do the front markings on the imp piston point to the front of the engine or the front of the car? :lol:
Author:  drmini in aust [ Mon Mar 29, 2010 6:25 pm ]
Post subject: 
My bro is into Imps (me too, a bit). We'd have around 6 motors at the farm, including a couple of GTs.

The `front' of the engine is the fan pulley end. It ain't no Renault... :lol:
Author:  jester99 [ Mon Mar 29, 2010 10:49 pm ]
Post subject: 
are the gudgeons in these a press fit or can i just remove the circlip and swap it over without a press?
Author:  TheMiniMan [ Mon Mar 29, 2010 11:52 pm ]
Post subject: 
Hason,,, once you have all the pistons/rods out of then gine,,, firstly i`d check that all the raod-end caps are matching ,,,then i`d check the orientation of all the rods/pistons to see if the offset in all the rods will work the "right way" round ,,,so maybe you can leave the pistons on the rods & just fit them all correctly when going back together

you may see what i`m talking about when you have the pistons out,,, if you have any doubt them bring them over here & i`ll show you

i have 2x of these pistons here,,, & 2x of the "non-valve-relief-ed ones in an engine here :-) some motha do av em hey??? :-)
Author:  jester99 [ Tue Mar 30, 2010 10:18 pm ]
Post subject: 
Turned the piston around tonight. everything looks fine, was an easy task.

all the rods are now the right way around.

the conrod bearing shell doesnt look right though.

is there supposed to be a gap or is the shell not aligned in the rod correctly?

Image
Author:  spraycanmansam [ Wed Mar 31, 2010 12:16 am ]
Post subject: 
No there shouldn't be any gap. Looks like it just needs a little tap to bring it round so the bearing faces are parallel to the face of the rod. ie:

Image
Page 1 of 1 All times are UTC + 10 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/