piston rings

**Sun Mar 23, 2008 7:48 pm » Post: #1 » Download Post**

just a quick one!!!!!

on these new piston rings there is a letter N stamped on each one on one side do these face up or down

cheers all phil!!!

**Sun Mar 23, 2008 7:54 pm » Post: #2 » Download Post**

ID marks face upwards, don't they Wayne, Jeff!
And yes, the powervalve bolt is left hand thread!

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**Sun Mar 23, 2008 8:01 pm » Post: #3 » Download Post**

cheers fontyyy ill do you a good price on these pistons ha ha!!!

**Sun Mar 23, 2008 8:06 pm » Post: #4 » Download Post**

2nd hand pistons aren't worth a penny, it's just that they tend to arrive with second hand barrels.

New rings are worth having, the piston kind of is if it's old, reusing base and head gaskets is sketchy, the bearing...maybe...the clip, may as well, they're pence...the pin, what the? No one ever has seen a piston pin fail I'm sure.
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**Sun Mar 23, 2008 8:20 pm » Post: #5 » Download Post**

fontyyy wrote:
New rings are worth having, the piston kind of is if it's old, reusing base and head gaskets is sketchy, the bearing...maybe...the clip, may as well, they're pence...the pin, what the? No one ever has seen a piston pin fail I'm sure.

Just because you have got away with it, I don't think it should be advocated.

I can show you small-end bearings and pins that have failed. I will ALWAYS advocate replacing all the components when doing a top-end rebuild after a failure. I too have re-used parts as a "quick fix" with success, but they have been replaced with new at the earliest possible opportunity.

I don't think it's good to say "it will be alright because I've got away with it", and I certainly don't agree with this policy.
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**Sun Mar 23, 2008 10:10 pm » Post: #6 » Download Post**

I didn't say it will be alright, in fact at some undetermind time in the not too distant future I believe it certainly will not be alright.

However what is going to happen here is quite possibly the fitting of new piston, rings, pin, bearing, clip etc to a damaged barrel which strikes me as folly and a waste of money, if you're going to chuck semi damaged things togeather that's fine, it'll probably work. If you're going to buy new bits then that's fine too, it'll probably work for longer. However fitting a new pin and bearing in a damaged barrel is like locking your upstairs windows and leaving the front door wide open.
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**Sun Mar 23, 2008 10:31 pm » Post: #7 » Download Post**

Good robust discussions and opinions are why people come to forums. Laughing

But after 10 post about the same it starts to sound like lecturing.

Life is a journey of discovery, we all have to fail at some time to learn.