List,
No one responded to my earlier post so I'll try again with some
additional information: I called BPNW and they faxed me the instruction
sheet that should have been packed with the rings. According to their
spec. sheet, the "normal" gap for rings in TR6 size bores is .008" to
.014". The "maximum gap" is .08" to .024" Since my gap is .018", it
falls in their "maximum" range, but outside the normal range. I don't
feel comfortable with Abby Normal ring gaps. Is this a problem? Not my
conformist tendencies... the ring gap. I've never come across rings
that were too short. Always had to file them a bit, or they were in
spec.
If no one on the list feels qualified to give advice in this matter,
does anyone know how I can get in touch with someone who might.
Help!
Jim Davis wrote:
>
> List,
> In the process of checking the ring gap prior to installing my new
> +.040 pistons, the 1st compression ring is in spec., although on the
> high end at .017. The second ring is .018, or +.005 over spec.
> consistently from bore to bore. The bore diameter is 2.969". The pistons
> came with the rings and were purchased from BPNW.
> Questions: 1. Did the machine shop overbore the cylinders?
> or 2. are the rings too short?
> or 3. because it is a +.040
> overbore I am worrying needlessly and everything will be just fine if I
> install the pistons with the supplied rings?
> Please let it be 3, as I was planning on putting this engine together
> this weekend.
> TIA
> Jim Davis
> CF38690UO engine on stand
> CF37325U
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