Preparing for Engine Rebuild - with piccies
04-23-2002 | 12:40 PM
#16
Thread Starter
Instructor
Joined: Feb 2002
Posts: 240
Likes: 0
From: uk, cornwall, where it rains - mostly!
further update:
couldn't resist going down to the machine shop and having a look.
lost about 30 thou off the crank web next to thrust bearing, and a further 40 thou off the block bearing carrier....bearing toast.
i have now spoken to a specialist metal restoring company, they can sort the crank, no problem. but they are unsure about the block, it being 'alusil' or reynolds 360.
have any of you guys built up a damaged land with weld on a 928 block?
or maybe one of these ceramic loaded epoxies would be better? no risk of damage to the block by the heat of welding.
drill and pin the damaged area, and then pack up with special epoxy, wait until set and then machine back. after all its the bearing shell that provides the thrust bearing surface.
what think you guys?
johnb
<img src="confused.gif" border="0">
couldn't resist going down to the machine shop and having a look.
lost about 30 thou off the crank web next to thrust bearing, and a further 40 thou off the block bearing carrier....bearing toast.
i have now spoken to a specialist metal restoring company, they can sort the crank, no problem. but they are unsure about the block, it being 'alusil' or reynolds 360.
have any of you guys built up a damaged land with weld on a 928 block?
or maybe one of these ceramic loaded epoxies would be better? no risk of damage to the block by the heat of welding.
drill and pin the damaged area, and then pack up with special epoxy, wait until set and then machine back. after all its the bearing shell that provides the thrust bearing surface.
what think you guys?
johnb
<img src="confused.gif" border="0">
04-24-2002 | 03:16 AM
#18
Racer
Joined: May 2001
Posts: 296
Likes: 1
From: South Texas (Way South)
I been watching this one from the beginning and was glade to here of the zero amount of cylinder wear at 100K plus miles. John (B) I was with you on the re-ring and gasket job as a way to save a few bucks, but with the news of the thrust bearing failure and spun bearings I would forego the thought of saving the current block and crank and start looking for a rebuild able core.
JM.02 but it sounds like you have a great candidate for a nice coffee table.
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
Max
JM.02 but it sounds like you have a great candidate for a nice coffee table.
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
Max
05-27-2002 | 09:14 PM
#19
Track Day
Joined: May 2002
Posts: 16
Likes: 0
From: Israel
Hi
I do not know whther this is too off-topic or not, but it is somwhat related to my problem:
Re: 928S euro spec 4.7L engine M28.11
a. Trying to determine whether two-thousands of a millimeter gap requires cylinder preparation (honing, silicone exposure etc.). apart from that there are no visible defects whatsoever. Also not sure whether anyone will do this procedure locally.
b. purchased a piston ring set from "GOETZE by federal mogul" and found the top compression ring gap was outside max. allowed (0.63 mm instead of 0.40 mm) bottom compression O.K at 0.30 mm. This was confirmed on all cylinders/rings and on other blocks using other sets from GOETZE. any opinions ???. In my despair I am considering the purchase of a Deves set.
(Engine is Stock)
Thanks,
Eran
<img src="confused.gif" border="0">
I do not know whther this is too off-topic or not, but it is somwhat related to my problem:
Re: 928S euro spec 4.7L engine M28.11
a. Trying to determine whether two-thousands of a millimeter gap requires cylinder preparation (honing, silicone exposure etc.). apart from that there are no visible defects whatsoever. Also not sure whether anyone will do this procedure locally.
b. purchased a piston ring set from "GOETZE by federal mogul" and found the top compression ring gap was outside max. allowed (0.63 mm instead of 0.40 mm) bottom compression O.K at 0.30 mm. This was confirmed on all cylinders/rings and on other blocks using other sets from GOETZE. any opinions ???. In my despair I am considering the purchase of a Deves set.
(Engine is Stock)
Thanks,
Eran
<img src="confused.gif" border="0">
