Hi
Finn/Group:
Sorry, my reference to bolt
location was wrong – looked at the diagram off by 90 degrees
… the broken bolt is actually either #5, #9 or #13 in the
torque-sequence.
I
guess the bolt isn’t directly exposed to oil flow, but it is
adjacent to the oil return port/internal oil gallery to the
stock oil filter pedestal … see attached picture.
Wouldn’t
a loose tension
bolt in this
area be a concern for both oil and coolant, getting around the outer
O-ring?
We
put those rubber sealing washers on each bolt head for some
reason …
Jeff
Hi Jeff,
I've done that too.
Wrapped the long drill bit in something to keep it centered.
(Probably used layers of heat shrink.)
Brazed an easy-out to a piece of 1/4" (?) steel tube.
As far as I know, none of the tension bolt holes are exposed
to oil flow. Not sure that that particular bolt passes
through any cavities directly exposed to coolant either. In
any case, I don't see that any small steel shavings would
adversely affect the cooling system. Antifreeze should
prevent any electrolytic reaction between steel and aluminum
if a bit of steel shaving should become lodged in a
radiator, right? Or you could disconnect the radiators and
flush the cooling channels in the engine block. But first
look at where that particular bolt passes through. Might not
be a problem at all.
Finn
On 1/4/2011
9:03 AM, Jeff Whaley wrote:
Yesterday,
while checking over my engine for the source of a nagging
oil leak I found a broken tension bolt, I guess it’s good in
respect to finding the problem but WTF?
During
installation I applied a spiral of silicone around each bolt
trying to prevent this from happening. The broken bolt is
positioned in the upper left hand corner (if viewed from
prop end) and according to my Haynes Manual it is either #8
or #12 in the torque-sequence.
Checking
Tracy’s website I read about his SQUAWK with same issue many
years ago … he was able to get the bolt’s threaded portion
out without having to tear-down the engine or resort to the
drill and easy-out method.
What
happens to those metal shavings inside there if I have to
drill and use an easy-out?
Can
I extract them all with a magnet or compressed air?
Am
I looking at an engine tear-down … or replace the bolt (or
bolts), re-torque the stack and carry on?
Jeff
__________ Information from ESET NOD32 Antivirus, version of
virus signature database 5759 (20110104) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
This
message, and the documents attached hereto, is intended only
for the addressee and may contain privileged or confidential
information. Any unauthorized disclosure is strictly
prohibited. If you have received this message in error,
please notify us immediately so that we may correct our
internal records. Please then delete the original message.
Thank you.
__________ Information from ESET NOD32 Antivirus, version of
virus signature database 5759 (20110104) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com