<VV> Parts> Advice on Rings (was Help - Oil Out Dipstick Tube)

[BBRT]

My Son, who is Master Cert Mech L1 for ~ 15 yr, multi-make, etc. says NEVER 
depend on a "new" part. Often they are not functional for whatever reason; 
incorrect size, wrong threads or not, material (breaks), length, function, 
etc.  When you put a new steering rack on a firewall and it takes 2-3 hours 
and it leaks, and then you eat your labor (meaning you don't get paid those 
hours to re-do it), you become REALLY careful about checking new parts. 
Never assume....
And even skilled mechanics/techs make mistakes - like with the second 
ring...

Chuck S
BBRT
----- Original Message ----- 
From: "Mark Durham" <62vair at gmail.com>
>
> However, as much as you are having problems, I would suggest methodically
> pulling that bank apart to find the culprit. Since the low compression is 
> on
> one side, you may have actually got oversized cylinders, a plus ten piston
> in a plus 20, type of thing and it would be difficult to measure. And if 
> the
> mechanic has not had any problems with his supplier, he may not be as
> vigilant in checking all of the measurements before assembly.
>
> As a side note, I fixed a brand new Thunderbird which had a rod knock 
> right
> off the delivery truck with 2 miles on it (Yes, I hang my head low, I 
> worked
> in a Ford garage for awhile). One journal on the crank had been undersized
> by - .010, probably due to a flaw in the rod journal and they didn't want 
> to
> throw the crank away, and the engine guys had to install what they were
> given. I put a minus 10 bearing in that hole and life was good.
>
> So, just be methodical and check everything, you will find it. No
> guarantees, but if those cylinders are using that much oil, you probably
> won't have any damage to the cyl walls. Just make sure the cyl bore and
> piston sizes are matching!
>
> Mark Durham
>