GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Re: [GMCnet] How precious is a 455 block/crank??
Re: [GMCnet] How precious is a 455 block/crank?? [message #324710] Sun, 08 October 2017 15:19 Go to next message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma: -62
Senior Member
The crank, if, it is an agricultural/motorhome engine could be a nodular
iron piece and if standard, is worth $100.00 as a core. Heads are getting
scarce here on the west coach as well. Blocks are high nickel, and not much
goes wrong with them. Still quite a few around. My assessment, anyway.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Oct 8, 2017 12:36 PM, "Matt Colie" wrote:

I and a friend acquired a pair of rust-ball 455s. We were told be the
seller (another GMC owner) that both turned over. To me that means that it
could be barred through two full turns. This would be a good indicator of
no serious internal damage. little.

While trying bar the crank of one so I could dismount the torque converter
in preparation to putting it on a work stand, I discovered it could only go
about 60°. I finally go the heads off and discovered that three cylinders
are corroded and one is very badly so. I have not cleaned it up, but I
would be surprised if it cleaned up at 0.030 over size.

I know I can get it apart more to pull things like the crankshaft. But I
currently am wondering if that would be a waste of my time.
The heads are G and I haven't measured to see if they are big valve (2.070
as opposed to 2.000), and that intake seat might also be wasted.

Now, I would like the opinion of this forum as to if it is even worth my
while to salvage other parts.

If you have an opinion based on experience, I would love to hear it.

Thank You

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Re: [GMCnet] How precious is a 455 block/crank?? [message #324760 is a reply to message #324710] Mon, 09 October 2017 16:15 Go to previous message
thesmith is currently offline  thesmith   United States
Messages: 589
Registered: February 2015
Location: Cary, NC
Karma: 6
Senior Member
In a similar vein, what would be value of 403 engine in typical parked left for a decade and a assumed failed tyranny (towed in reverse for example)
Thinking long term when I might need one for core.


Pete


James Hupy wrote on Sun, 08 October 2017 16:19
The crank, if, it is an agricultural/motorhome engine could be a nodular
iron piece and if standard, is worth $100.00 as a core. Heads are getting
scarce here on the west coach as well. Blocks are high nickel, and not much
goes wrong with them. Still quite a few around. My assessment, anyway.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Oct 8, 2017 12:36 PM, "Matt Colie" wrote:

I and a friend acquired a pair of rust-ball 455s. We were told be the
seller (another GMC owner) that both turned over. To me that means that it
could be barred through two full turns. This would be a good indicator of
no serious internal damage. little.

While trying bar the crank of one so I could dismount the torque converter
in preparation to putting it on a work stand, I discovered it could only go
about 60°. I finally go the heads off and discovered that three cylinders
are corroded and one is very badly so. I have not cleaned it up, but I
would be surprised if it cleaned up at 0.030 over size.

I know I can get it apart more to pull things like the crankshaft. But I
currently am wondering if that would be a waste of my time.
The heads are G and I haven't measured to see if they are big valve (2.070
as opposed to 2.000), and that intake seat might also be wasted.

Now, I would like the opinion of this forum as to if it is even worth my
while to salvage other parts.

If you have an opinion based on experience, I would love to hear it.

Thank You

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Cary, NC 1978 Center Kitchen Royale.
Previous Topic: Re: [GMCnet] How presious is a 455 block/crank??
Next Topic: What is the easiest way to down size a picture
Goto Forum:
  


Current Time: Fri Mar 29 04:15:47 CDT 2024

Total time taken to generate the page: 0.04538 seconds