| [GMCnet] Timing chain guide [message #346431] |
Wed, 14 August 2019 10:53  |
Jeff Luke
Messages: 12
Registered: August 2019
Karma: 1
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Junior Member |
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Hey Y'all, (duplicate post t on Facebook)
I could use some direction on my '77 403 engine project. Now that I made it home with a slipped timing chain, I need to replace it and I want to do it right (but i never did this type of engine work before. I'm brave, have normal tools, the power of google/youtube and willing to offer some knuckle abrasion to the engine spirits ;-)
I see from comments that the way to go is a Cloyes 9-3113 double roller, true roller chain/ gear set....leave in the eccentric.
I need a few gasket but not sure what procedure to follow or what else I have to order or inspect to ensure nothing else got damaged by running it with a tooth slipped.
Anyone have a good reference on parts/tools needed and which method is best without removing the entire engine?
Is there anything else i should be doing while i have this amount of maintenance underway (I already have a new water pump for example).
Thanks for your help :-)
Sent from my mobile device
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| Re: [GMCnet] Timing chain guide [message #346436 is a reply to message #346435] |
Wed, 14 August 2019 12:33  |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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I also did that job about 10 years ago:
http://www.gmcmhphotos.com/photos/g5504-timing-chain-2fradiator-project-05-2f09.html
I took the easy way out and got all my parts from Jim K at Applied GMC. That way I was sure I was getting the right stuff.
You can get a 'timing set' of gaskets, you'll want to lift the engine off the front mount from the top. Set your #1 cylinder to TDC on compression and don't move it from there. You'll need a puller for the vibration dampener, and basic hand tools. An impact helps to get the big bolt out of the crankshaft. Remove the radiator, shroud, accessories off the front of the engine and take lots of pics before you start. Also, bag u and label all the hardware from each assembly separately. It makes it much easier to put it all together again.
Refer to the manual.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Timing chain guide [message #346441 is a reply to message #346431] |
Wed, 14 August 2019 15:45 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Well, >i< done it since then, the water pump and access part anyhow. Easy to get at if you yank the grille and radiator and set them aside. Get one of the little short stools on wheels if you don't move around as well as you did at 18 and sit on it while you disassemble the front of the motor. Take lotsa pictures as you go. Pay particular attention to which little item goes where. Some of those washers are actually spacers which make the belts run in line. J-B Weld Ultimate Gray sealer for gaskets. Note which length bolt went where and put it back the same way. Hold the engine up with a hoist or brace 4x4 across the hatch and pick it up with a ratchet strap. If you're reasonably friendly with Advance (and I suspect the other chains) they'll lend you the correct puller for the damper. If there's any question as to the serviceability of it or anything else on the front of the engine, replace it. The common 455 stuff can be had easily, mounts and rarities can be got from Kanomata.
I usually print the relevant pages out of the repair and parts manuals, and don't worry about greasy hands on them. It also lets me put lines that cross a page boundary side by side instead of having to flip.
Throw away gloves, at east for disassembly, are a help, as is a big jug of Go-Jo <tm> or the like. I buy cases of the cheapest Aldi paper towels and use them promiscuously. Aids greatly in keeping things clean when you put it back together.
The only magic in it is in getting the washers and spacers and bolts back where they came from.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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