Subject: [Healeys] Right rings and pistons?

From: "Rafael Abugattas" <[email-masked]>
Date: Thu, 8 Jan 2015 20:43:41 -0500 boundary="----=_NextPart_000_0001_01D02B83.CB9BF450"

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Hi all,

I just started a nut and bolt restoration on my 1962 BT7 Tri Carb. Today =
we
took the engine apart and sent the block and head to the machine shop. =
On a
first inspection, it seems that the cylinders do not need to be bored, =
only
polished.

=20

My mechanic is concerned about the pistons and the type of rings it =
uses.
Enclosed is a picture of one of the pistons and the three set of rings.=20

=20

I am no expert but according to his explanation: Starting from the =
right,
the first thick ring on the picture is the compression ring. The middle =
or
second set includes two additional thin compression rings and what seems
like an heptagon that I understand helps keep the rings open. The third =
set
includes three lubrication rings. =20

=20

He mentioned that the middle set of two thin compression rings with the
heptagon is not a very common configuration. He was wondering whether =
they
could be substituted with one regular compression ring.=20

=20

He has worked before on a Healey engine and he doesn=B4t recall pistons =
with
the grooves on the side like the one on the picture. I guess the groove
design helps with the lubrication and cooling of the pistons. Are these
original pistons? Would you recommend changing them?

=20

Thanks in advance for your comments.

=20

Best regards,

Rafael

=20

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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span lang=3DEN-US>Hi all,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>I just started a nut and bolt =
restoration on my 1962 BT7 Tri Carb. Today we took the engine apart and =
sent the block and head to the machine shop. On a first inspection, it =
seems that the cylinders do not need to be bored, only =
polished.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>My mechanic is concerned about the pistons and the type of =
rings it uses. Enclosed is a picture of one of the pistons and the three =
set of rings. <o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I am no expert but according to his explanation: Starting =
from the right,=A0 the first thick ring on the picture is the =
compression ring. The middle or second set includes two additional thin =
compression rings and what seems like an heptagon that I understand =
helps keep the rings open. The third set includes three lubrication =
rings.=A0 <o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>He mentioned that the middle set of two thin compression =
rings with the heptagon is not a very common configuration. He was =
wondering whether they could be substituted with one regular compression =
ring. <o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>He has worked before on a Healey engine and he doesn=B4t =
recall pistons with the grooves on the side like the one on the picture. =
I guess the groove design helps with the lubrication and cooling of the =
pistons. Are these original pistons? Would you recommend changing =
them?<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Thanks in advance for your =
comments.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Best regards,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Rafael<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div></body></html>
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