AirSpeed VW Community Forums

Technical => Engine Tech Forum => Topic started by: Trevor P on May 24, 2006, 09:40:22 PM

Title: 1641cc?
Post by: Trevor P on May 24, 2006, 09:40:22 PM

Just tore down one of my spare engines. Was told it was 1641 from the PO when I bought my 62 notch. The pistons are stamped 86.46mm, which would make this a 1620cc, and not an 87mm bore 1641. I thought that maybe they were VW Canada overbores from a reman engine (which this case was at one time) but, they are Mahle brand pistons, so I'm kinda confused.

Title: 1641cc?
Post by: Bruce on May 25, 2006, 02:37:19 AM

I thought the VW overbored pistons stopped at

Title: 1641cc?
Post by: Trevor P on May 25, 2006, 11:47:13 AM

The reason I ask is cause the rings need replacing, but everything else checks OK, other than the cylinders need honing. So where the heck does a guy get rings for these odd balls? I will take the vernier to them tonight to make sure they are stamped correctly.

Title: 1641cc?
Post by: Geoff on May 25, 2006, 11:50:32 AM

Hmmm good question, last time I tried VW for their oversized rings they were more than double the price of new pistons.

Title: 1641cc?
Post by: Trevor P on May 25, 2006, 04:02:05 PM

Correct you are Geoff. I just checked on ETKA, and they do list an 86mm and an 86.5mm. They are around $30-$40 per ring! :o  And also NLA :wacko:
Looks like I may be investing in a new set of P&C's for this engine. Unless...someone has a set of NOS 86.5mm rings laying in their stash. I really hate to throw these P&C's out, cause they are still in real good shape.

Title: 1641cc?
Post by: Cameron on May 26, 2006, 10:54:23 AM

Hey Trevor!

Find some catalogs (or websites) for ring manufacturers, Hastings, Deves, Total Seal, etc. Go through them. and I bet you'll find something that will fit. Buy from one of the ring distributors, and it will be a lot cheaper than VW.  

Title: 1641cc?
Post by: egspot on May 26, 2006, 11:07:03 AM

Quote

The reason I ask is cause the rings need replacing, but everything else checks OK, other than the cylinders need honing. So where the heck does a guy get rings for these odd balls? I will take the vernier to them tonight to make sure they are stamped correctly.

What is \"honing\" ?

Title: 1641cc?
Post by: Trevor P on May 26, 2006, 11:41:20 AM

Thanks Cam...never even thought of that to be honest. I measured these, and they come in at just a hair over 86mm.

Egspot...Honing is a process used to reestablish a cross hatch pattern (fancy way of saying lots 'o' tiny scratches) in the cyl. bore for oil control. Basically looks like  3 fingers with fine grit stones on them that are spun with a drill.