With regards to my engine build im just wondering how difficult it is to remove the grudgeon pins from pistons and refitting, or is this a job for an engineering place to take on ?
With regards to my engine build im just wondering how difficult it is to remove the grudgeon pins from pistons and refitting, or is this a job for an engineering place to take on ?
machine shop matey will cost around £30
If the pins got a grudge then it could prove difficult
If the pin is ' fixed ' to the rod then it needs heating and then pressing to get it out and best left to someone with the right gear .
I wouldn't bother that much if it all looks OK and you'd probably be better off just getting another if any look doubtful .
I'm talking GTA here but it's all the same ...GTA turbo has loose fitting pin held in with circlips ,GTA Atmo has pins pressed into rod .
I have the Renault tool for this..... Was going to sell it last year, but could rent it out.
If your doing c1j you have to warm the pistons, freeze the gudeon pins and use a small press. F block engine is easier.
i have found that you always wreck the piston when pressing it out.
matt, what is the renault tool like and how does it work ?
Like sparkie, I've never had any success and any of the machine shops I've tried have either run a mile or attempted it and distorted the piston.
If the pistons already wrecked it's much easier because you can cut it off and just heat/press the pin out.
Just walked in from the workshop..... Supposed to be a straight forward pre track session check over and change brake fluid, turned into a leaking bias valve.....lucky I had a spare.
I'll pop a pic of the tool up here tomorrow.... Ker-nackered at the moment.
Matt
Dont know what it is with Bias / proportioning valves, i popped 2 in a year, willwood, tilton, but my new AP one seems to be holding up... enjoy the track MattOriginally Posted by Matt5
Another late one.....I'll try again Sat.......neeed Sleeeeeeeppp
Here we are, renault gudgeon pin tool.
how much heat sould be applied to the rod when removing pin
Enough to make the pin move I suppose....
Decent blow torch is ok, enough heat to move the pin with a tiny bit of resistance, the Renault tool is used with a press and by hand as it takes in many different pistons.
There is a vid on YouTube which is quite usefull by Boxwrench (not Renault specific), I'll try and find it.
Manual states heat required to install pins ,doesn't say to use heat when removing ,just press out .
250 c on a hot plate ,use solder to gauge when ready .
small end 1.pdfsmall end 2.pdf
take one old liner drill a 22mm hole straight through
and this will give you somthing to support the piston when pressing in/out
when i done mine in the garage i put said liner in the vice insert piston and hammered out the pins (wasnt keeping the pistons but they never distorted anyway)
stuck the new pins in the freezer and the rods in the oven for 20minutes
then lined up in the old liner and tapped in the pins
6000miles later there still working
Anyone else done this?take one old liner drill a 22mm hole straight through
and this will give you somthing to support the piston when pressing in/out
when i done mine in the garage i put said liner in the vice insert piston and hammered out the pins (wasnt keeping the pistons but they never distorted anyway)
stuck the new pins in the freezer and the rods in the oven for 20minutes
then lined up in the old liner and tapped in the pins
6000miles later there still working
yep that is how i do it also. I also haven't been able to keep one piston whole when pressing the pins out. Iff you overheat them they sometimes come free after a while. So i use a torch to heat them and a peace of solder in the other hand. Just be shure you heat it everywhere and be fast when pressing them in by hand.
When you don't feel confident i would let a shop do it.
yep that is how i do it also. I also haven't been able to keep one piston whole when pressing the pins out. Iff you overheat them they sometimes come free after a while. So i use a torch to heat them and a peace of solder in the other hand. Just be shure you heat it everywhere and be fast when pressing them in by hand.
When you don't feel confident i would let a shop do it.
cheers chappy
I've managed to do this successfully, though at the time my mum almost killed me for using her oven to heat the pistons up... The method Matt suggests is bang on, however a can of plumbing pipe freezing spray is a BIG help!
I would like to know why you would heat the pistons? I only heat the rods.
Or is it so you dont break them when you remove them?
Last edited by sega; 16-11-2012 at 10:24.
This^.
Ok thanks might come in handy someday. But i always use new pistons so dont bother much with the old ones.
Heating also stops you cracking the new pistons too.
Iff the rods were giving to much resistance wenn you were pushing the pin threw.
we took mine off recently, press them out cold in a vice, heat the rod to refit and pop them in by hand. no damage caused. we used a brass rod thing we made up, i'll try and find some pics
Fancy giving us a hand with this Markey? I'll pay yer fuel chap.
yea sure, although u dont need to fuel me, i have a clio dci
Cheers fella - I'm gonna have a go tonight pressing the other out tonight. I'll give you a shout when I know what I'm doing.
Took mine to the local engineers £10 he heats them
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