Hi Gene I had bearing failure at about 90,000 on my Eleganza II. It was one
of the last brand new 455's out of the crate from GM whenm it replaced the
403. I was in Utah on 80 doing 65-70 for a while, as we entered the
construction area we reduced to stop and go when I heard the bearings. The
engine later was taken apart her at home and there were cracked rings in 4
and 5 and same bearing failed. The rebuilds I got came from The Motor
Works, Spokane Washington through Barber BOlds in Salt Lake City. Their
guarantee is worthless unless they do the work. My GMC was down for a year
with two of their engines. I am in the process of a law suit with them and
the mechanics for other things. I had my 455 sent home and rebuilt
locally. Tom Green and Joe Mondello Labor and Parts. Let me tell you for
sure. This engine never sounded so good. It pulls a 6% grade by our house
at 65 and we still have pedal. I am very pleased. It is not a normal
rebuild. The entire engine was replaced inside the "L" block with 6 %
nickel rate. Valves with rotators are Manly with Chrome stems over sized
with the best guides and put in "C" heads that have been ported. Line
bored, RV Cam recommendation by Joe Mondello. New Crank, The rods were ok.
They were machined I think .16 to allow for the oil. Additionally the oil
restrict ors were installed too! New large cast water pump, my original got
lost somewhere in the mess out of Utah. The entire engine was Balanced and
Blue Printed. Painted Black, Thronly Headers, Copper Gaskets and the rest
of what was required. Tricks etc. I think it will out last me this time.
It is not a $ 2000.00 engine either. There were more than 4K in parts that
went into it. Chuck
> -- [ From: Eugene Fisher * EMC.Ver #2.5.3 ] --
>
> I guess I just do not understand why the GMC application is hard use on
> "the best v8 engine GMC built".
> The cars always went over 70 miles per hour and all the oil did not
> collect in the valve covers.
> The cars typically went 100,000 miles without an over haul.
> The RPM were about the same as in a GMC application.
> The new GMC motor homes did not break down every trip.
>
> Dave gets 200,000 miles on his GMC motor home motors. Why don't we
> all?
> It looks like we are just not getting good rebuilds. I know in the
> "old days" motor rebuilders typically replaced only the bad bearing, dug
> out the ring grove and slapped in an over size piston (no boreing) etc.
> How do you keep from getting a 50 over motor from a rebuilder with a
> 403 gasket on a 455?
>
> When Arch asked for actual bearing failures I only saw one one maybe
> two and I think they were on coaches with unknown maint. and history.
>
> Are these questions without answers or are we doing something wrong.
>
> gene 76pb/or/ca
of the last brand new 455's out of the crate from GM whenm it replaced the
403. I was in Utah on 80 doing 65-70 for a while, as we entered the
construction area we reduced to stop and go when I heard the bearings. The
engine later was taken apart her at home and there were cracked rings in 4
and 5 and same bearing failed. The rebuilds I got came from The Motor
Works, Spokane Washington through Barber BOlds in Salt Lake City. Their
guarantee is worthless unless they do the work. My GMC was down for a year
with two of their engines. I am in the process of a law suit with them and
the mechanics for other things. I had my 455 sent home and rebuilt
locally. Tom Green and Joe Mondello Labor and Parts. Let me tell you for
sure. This engine never sounded so good. It pulls a 6% grade by our house
at 65 and we still have pedal. I am very pleased. It is not a normal
rebuild. The entire engine was replaced inside the "L" block with 6 %
nickel rate. Valves with rotators are Manly with Chrome stems over sized
with the best guides and put in "C" heads that have been ported. Line
bored, RV Cam recommendation by Joe Mondello. New Crank, The rods were ok.
They were machined I think .16 to allow for the oil. Additionally the oil
restrict ors were installed too! New large cast water pump, my original got
lost somewhere in the mess out of Utah. The entire engine was Balanced and
Blue Printed. Painted Black, Thronly Headers, Copper Gaskets and the rest
of what was required. Tricks etc. I think it will out last me this time.
It is not a $ 2000.00 engine either. There were more than 4K in parts that
went into it. Chuck
> -- [ From: Eugene Fisher * EMC.Ver #2.5.3 ] --
>
> I guess I just do not understand why the GMC application is hard use on
> "the best v8 engine GMC built".
> The cars always went over 70 miles per hour and all the oil did not
> collect in the valve covers.
> The cars typically went 100,000 miles without an over haul.
> The RPM were about the same as in a GMC application.
> The new GMC motor homes did not break down every trip.
>
> Dave gets 200,000 miles on his GMC motor home motors. Why don't we
> all?
> It looks like we are just not getting good rebuilds. I know in the
> "old days" motor rebuilders typically replaced only the bad bearing, dug
> out the ring grove and slapped in an over size piston (no boreing) etc.
> How do you keep from getting a 50 over motor from a rebuilder with a
> 403 gasket on a 455?
>
> When Arch asked for actual bearing failures I only saw one one maybe
> two and I think they were on coaches with unknown maint. and history.
>
> Are these questions without answers or are we doing something wrong.
>
> gene 76pb/or/ca