| Colorado timing chain [message #320687] |
Wed, 19 July 2017 20:31  |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
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Senior Member |
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Just an update about my timing chain.
I am eyeballs deep into some major home renovations that have a hard deadline so I realized that I didnt have the time to do this repair myself. At the advice of another owner I researched and found a local mobile mechanic who is willing and able to review and perform the work. He works on older hot rods so is used to our vintage of automobiles.
I was hoping to ask you all what else should be replaced during the repair while everything is apart.
Any suggestions?
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
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| Re: [GMCnet] Colorado timing chain [message #320693 is a reply to message #320687] |
Wed, 19 July 2017 21:31  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Robert,
Most of your hoses, including all of the radiator hoses will be disturbed,
so unless they're fairly new, now's the time to replace them. LIkewise for
the transmission and engine cooler lines. Similarly, the radiator will be
out, so it may be worthwhile to have it checked and cleaned by a reputable
radiator shop. Finally, I'd examine the water pump carefully. If it has
no sign of leakage around the input shaft and if it spins freely, I
wouldn't risk replacing it with a "new", possibly short-lived replacement.
But if it fails any test, buy the best one you can find -- someone will
hopefully direct you to an all ball or roller bearing model; I can't.
I can't think of anything else that will be disturbed or easier to handle
now than later.
JWID,
Ken H.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc., etc.
www.gmcwipersetc.com
On Wed, Jul 19, 2017 at 9:31 PM, Robert Peesel wrote:
> Just an update about my timing chain.
>
> I am eyeballs deep into some major home renovations that have a hard
> deadline so I realized that I didnt have the time to do this repair
> myself. At
> the advice of another owner I researched and found a local mobile
> mechanic who is willing and able to review and perform the work. He works
> on older
> hot rods so is used to our vintage of automobiles.
>
> I was hoping to ask you all what else should be replaced during the repair
> while everything is apart.
>
> Any suggestions?
> --
> Robert Peesel
>
> 1976 Royale 26'
>
> Side Dry Bath
>
> Conifer, Colorado
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Colorado timing chain [message #320747 is a reply to message #320745] |
Thu, 20 July 2017 23:04 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Toronado hoses will NOT fit. Belts maybe. Look in the GMCMI parts interchange for the appropriate numbers. Be sure to get 7/16" (11mm.) wide belts. Do not trust the package. Try to put a 10 mm. wide open end wrench across the belt. It the belt goes in the 10 mm. wrench, IT IS THE WRONG WIDTH BELT.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Colorado timing chain [message #320748 is a reply to message #320747] |
Thu, 20 July 2017 23:26 |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
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Senior Member |
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Thanks Ken,
I've been having real problems logging into the parts interchange site on gmcmi.com tonight. My printed parts interchange is currently in the GMC so I don't have it available at the moment.
I will be picking up the new parts for the mechanic to reinstall.
I really wish I was able to tackle this myself, but this summer has been the busiest I can remember.
Bob
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
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| Re: [GMCnet] Colorado timing chain [message #320749 is a reply to message #320748] |
Thu, 20 July 2017 23:45 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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I have replaced mine with the radiator in place it is tight but there is enough room. I would use a cloyes true roller chain if you don't want to chance the chain stretching it's worth the extra money. Don't forget to replace the crankshaft seal while you have it out. Don't let your mechanic support the engine by jacking it up on the oil pan sump or it could push the pan up against the oil pump pickup.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Colorado timing chain [message #320750 is a reply to message #320749] |
Thu, 20 July 2017 23:49 |
thorndike
Messages: 406
Registered: January 2011
Location: Conifer, Colorado
Karma: 0
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Senior Member |
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Good info, Roy.
Is there a document that describes the best way to do this repair? I'd like to read it over so I know what is going on and then send it to the mechanic.
Thanks for the info on the chain.
Bob
Robert Peesel
1976 Royale 26'
Side Dry Bath
Conifer, Colorado
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| Re: [GMCnet] Colorado timing chain [message #320751 is a reply to message #320745] |
Fri, 21 July 2017 00:07 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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For the best belt fit, take your old ones (intact) to the parts store and use their gauge to measure and size the belt. Follow Ken's advice on the width and don't get the narrow belts. I ended up getting a lawn mower duty belt for the AC pump on mine to satisfy the pump pulley. Maybe it's not the original pump, maybe it came off of a Case tractor, but it needed that large size belt in that pulley to transmit the torque without slipping. All the possibilities from the parts store dropped down to the bottom of the groove and slipped every time the compressor was turned on because there was no wedge effect.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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