wrist pin clip position

Rodney Mopedfield /

How should piston wrist pin clips be positioned? I can't find any solid information on this.

Re: wrist pin clip position

Opening should be oriented in line with travel. Ie, opening of the "c" should face directly up or down. I always go down.

Never re use em!

Re: wrist pin clip position

> Rodney Mopedfield Wrote:

> -------------------------------------------------------

> How should piston wrist pin clips be positioned? I can't find any solid

> information on this.

You can't find any definition because , logically , clips should be positioned solidly in the clip detent/furrow/groove .

Which way the clip opening goes doesn't matter , except to those superstitious types .

For over 50 years , I've never done it any other way , in all types of motors , and never had a problem .

Re: wrist pin clip position

Yup. Just make sure they're in the groove all the way and forget about it.

Re: wrist pin clip position

Paul Funyun /

> Aaron Blair Wrote:

> -------------------------------------------------------

> Opening should be oriented in line with travel. Ie, opening of the "c"

> should face directly up or down. I always go down.

>

> Never re use em!

Technically you want the them the opposite way. Think about how the fast the piston goes back and forth. It could say at 25k rpm and or around 9,000gs over come the power of the spring steel. Causing it to compress onto itself. It should be in the

< [--C--] > orientation

Doubt If its ever gonna be spinning fast enough for that to happen. I think your temper on the piston ring would fail before the circlip comes off wrist pin from starting and stopping so fast.

Re: wrist pin clip position

Rodney Mopedfield /

I believe this is correct!

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Re: wrist pin clip position

Rodney and Aaron are correct.

Re: wrist pin clip position

> Don Ohio Wrote:

> -------------------------------------------------------

> Rodney and Aaron are correct.

They sure are , along with everyone else , as long as the clip is well seated in it's groove .

Re: wrist pin clip position

Kevin Bishop /

Once you have it in there I like to rotate it 360. If it wasn’t fully seated before you will hear it snap into place.

Re: wrist pin clip position

Those of you who have had circlips jump out hold up whats left of your piston

pistoncarnage.jpg

Re: wrist pin clip position

My piston survived relatively intact. I wish I could say the same for my 70cc Mec-Ur kit.

0529202346.jpg

Re: wrist pin clip position

Captain Janeway /

> cheetahchrome . Wrote:

> -------------------------------------------------------

> Those of you who have had circlips jump out hold up whats left of your

> piston

> >

Destroyed a piston / cylinder that way. Expensive mistake

Re: wrist pin clip position

Re-used some cool looking circlips. It was a cool looking smear in the cylinder after one blew up. Stupid.

Re: wrist pin clip position

> P D Wrote:

> -------------------------------------------------------

> > Rodney Mopedfield Wrote:

>

> > -------------------------------------------------------

>

> > How should piston wrist pin clips be positioned? I can't find any

> solid

>

> > information on this.

>

> You can't find any definition because , logically , clips should be

> positioned solidly in the clip detent/furrow/groove .

>

> Which way the clip opening goes doesn't matter , except to those

> superstitious types .

>

> For over 50 years , I've never done it any other way , in all types of

> motors , and never had a problem .

Yep, and they will end up rotating on their own over time.

Re: wrist pin clip position

> Don Ohio Wrote:

> -------------------------------------------------------

> Rodney and Aaron are correct.

Re: wrist pin clip position

That is a good one .

Good memories around that time . ;)

Re: wrist pin clip position

The correct position is on the piston. Not sitting on your workbench because you forgot it.

Re: wrist pin clip position

I had that happen with NEW ones. This time, all I had was used ones. Guess what? No problems this time. Go figure.

Re: wrist pin clip position

Well, I guess I better fire these guys up......LOL! The reason the circlip is to face open end DOWN is that the g-force or directional energy is attacking from above as the fuel

ignites and the shock will put force in everything, including the circlip. In this position it only forces the circlip to try and be more OPEN, and therefore will not cause it to try to close.

This is the way it was explained to me, and it makes sense to me.

If your circlips rotate, which they shouldn't, then mount them anyway you want.

Re: wrist pin clip position

I really should have changed cranks, to one with a needle bearing also, not a bushing.

Re: wrist pin clip position

I love the bushing. When it does, it just seizes. When a roller bearing dies, it takes everything with it.

Re: wrist pin clip position

> Don Ohio Wrote:

> -------------------------------------------------------

> Well, I guess I better fire these guys up......LOL! The reason the

> circlip is to face open end DOWN is that the g-force or directional

> energy is attacking from above as the fuel

>

> ignites and the shock will put force in everything, including the

> circlip. In this position it only forces the circlip to try and be more

> OPEN, and therefore will not cause it to try to close.

>

> This is the way it was explained to me, and it makes sense to me.

>

> If your circlips rotate, which they shouldn't, then mount them anyway

> ay you want.

Wrist pins rotate clips under normal use. Superstition aint the way.

Re: wrist pin clip position

> live ɘvil Wrote:

> -------------------------------------------------------

> > Don Ohio Wrote:

>

> > -------------------------------------------------------

>

> > Well, I guess I better fire these guys up......LOL! The reason the

>

> > circlip is to face open end DOWN is that the g-force or directional

>

> > energy is attacking from above as the fuel

>

> >

>

> > ignites and the shock will put force in everything, including the

>

> > circlip. In this position it only forces the circlip to try and be

> more

>

> > OPEN, and therefore will not cause it to try to close.

>

> >

>

> > This is the way it was explained to me, and it makes sense to me.

>

> >

>

> > If your circlips rotate, which they shouldn't, then mount them anyway

>

> > ay you want.

>

> Wrist pins rotate clips under normal use. Superstition aint the way.

I believe that varies with types of clips and pistons. Why would they be supposed to rotate? They should stay put.

Re: wrist pin clip position

Yes I believe they would stay put and not rotate. A rotating clip is demonic possession.

Re: wrist pin clip position

So, they're supposed to stay on the inside, right?

V1 polini. Used kit, new rings and circlips, put in very carefully with very good, perfect fitting snapring pliers with minimal squeezing. Made sure they were seated, like always.

No damage to the cylinder. The piston took it all, and saved the pieces.

IMG_20200709_130641.jpg
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Re: wrist pin clip position

> baird co Wrote:

> -------------------------------------------------------

> So, they're supposed to stay on the inside, right?

>

> V1 polini. Used kit, new rings and circlips, put in very carefully with

> very good, perfect fitting snapring pliers with minimal squeezing. Made

> sure they were seated, like always.

>

> No damage to the cylinder. The piston took it all, and saved the pieces.

I had that happen , once .

Never used that type circlip as piston pin clips again and have had no problems since .

Re: wrist pin clip position

Yeah, it's a first for me, too.

Re: wrist pin clip position

I have always heard one side at 12oclock,and the other at 6.Or in other words one side opening facing straight up ,then the other straight down.

Re: wrist pin clip position

> Rick Shaw Wrote:

> -------------------------------------------------------

> I have always heard one side at 12oclock,and the other at 6.Or in other

> words one side opening facing straight up ,then the other straight down.

Sounds like more of that Voodoo talk , again . ;)

Re: wrist pin clip position

Used that style of clip because it came with a Peugeot piston. Same thing happened. One side broke off after about 5 min of running and totaled the kit.

I don't ever recommend using those.

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