[Vwdiesel] Piston Ring questions

[Andrew .Libby]

Even if it's a car you're not keeping it's worth it in the long run to do
it right.  :-)


On Sat, Feb 9, 2013 at 6:26 PM, James Hansen <jhsg at sasktel.net> wrote:

> You need to measure the cylinders, and the pistons.  You don't change rings
> sizes to fix that kind of wear, the bore to piston measurement is the one
> that is the big deal. CLosest thing you can accomplish would be to get file
> fit rings, and set the end gaps yourself, but that  doesn't do sweet FA to
> make the ring shape of the piston ring conform to the bore it is oversize
> in.  Rings are made for a very narrow range of size.  Stretch one side, you
> no longer have a circle.
> If the pistons rock in the bore, you're more or less screwed, but really,
> you need some measuring tools. Outside micrometer and either a dial bore
> gauge, or minimum, a telescoping bore gauges which are quite economical,
> but
> have the most operator variability.
> If it's a car you're keeping, it's worth it in the long run to do it right.
> my 2 cents anyway.
> -james
>
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of Stephen Kraus
> Sent: February-09-13 5:43 PM
> To: vw fans
> Subject: [Vwdiesel] Piston Ring questions
>
> So, I'm about to do a ring job on my 98 Jetta TDI, but I'm rather worried
> I'm going to need to bore and buy oversize pistons due to compression
> issues.
>
> Are there slightly oversized piston rings you can buy, or am I screwed?
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