[Vwdiesel] UPDATE Re: Should I Re-Ring?

[Will Taygan]

Well, I got the new Peloquin transmission in, drove it for a mile, then
proceeded to pull the head.  Ugh.  

I found significant exhaust valve marks on #1 and #2 pistons.  I'm a
little ticked, since the machine shop said "ummmm, use the thickest head
gasket you have" I believe they knew it was a problem.  Ah well, live
and learn.  I'm surprised it didn't break the valves, as it's a good
1/8" deep, not just a light kiss like I've seen before.

I don't have the months and months it would take to redo this properly,
sooo...

* Head gasket looks good, Hmmm maybe running issues are more due to
valves??

** Almost no ridge on the cylinder top.  Should I scrub it with a
kitchen scrubber to remove slight carbon buildup before pulling the
pistons?  or just tap them through?

*** Do I need to hone If I'm putting the same rings back in?

**** Grant rings should be arriving today, but if the original
Kolbenschmidt ones gap okay should I keep them??

***** Bentley suggests 220 for the hone - in rack in a Westy, are the
balls sufficient?  Just put a rag over the crank?

THANKS,

Will in Alaska.




On Tue, 2014-01-21 at 17:43 -0900, Will Taygan wrote:
> (Crossposting from the Diesel-Vanagon group:)
> 
> Background: 82 Stock-ish 1.6NA - 2yrs+35k on bored +1mm rebuild.  Lost
> coolant at 10k, lost oil pressure at 34k.  Still running.  Was running
> hot on hills under load, replaced thermostat and radiator, helped (like
> perfect) for a couple weeks, now running hot and cold every couple
> miles.  Oil in coolant, replaced oil cooler, coolant tank stays full.
> 
> Plans: replace head gasket, swap oil pan for a turbo pan (a delayed
> project) and install new Peloquin trans coming this week from
> AATransaxle.
> 
> ** Compression 400,345,370,400 (HOT), 450,390,440,450 with a spoonful of
> 2-cycle oil.  Is a +50psi with oil sealing like this expected on normal
> rings, or would there be a benefit (or disadvantage) to putting new
> rings in? 
> 
> Probably should have replaced the headgasket a long time ago, but my
> compression tester was broken, and it HAS been driving daily (though
> just on local roads, not the highway).
> 
> SHOULD I RE-RING?  I'll have head and pan off anyway, but it would be
> in-rack with crank in.  I have another engine to rebuild when this one
> dies, but I would really like to get this one in shape for summer.
> 
> Thanks for you opinions!  I have disassembled a bunch of parts engines,
> but have never done rings or put pistons back in.
> 
> Will in Alaska.
> 
> 
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