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Belt Alignment '73 Big Block

MustangMan

New member
Joined
Jun 13, 2007
Messages
3
Location
New Orleans
Corvette
1973 454 4-speed Coupe
;helpI'm new here so if this isn't allowed, I apologize.

Anyone have the v-belt routing for a '73 Vette 454.
Compressor single pulley. Water pump, P/S pump and
alternator, dual pulleys. No smog pump. The compressor
pulley lines up with the front pulley of the W/P, P/S and
Alt. Not the crankshaft pulley. The front pulley of the
crankshaft lines up with the rear pulley of the W/P, P/S
and Alt. I don't think the compressor runs off the W/P, P/S
and Alt. without going around the crankshaft. I'm thinking
perhaps an extra pulley is missing on the crank or the dual
pulley on the crank with the inside pulley lining up with
nothing is in too far. Either a drawing, photo or illustration would help. I have a book of belt routing illustrations, but only goes back as far as 1981.

I've got all the information I need on this VIR system
except the belt routing.

Thanks,

Mustang Man
 

KOPBET

Well-known member
Joined
Jan 31, 2003
Messages
1,355
Location
Tulsey Town
Corvette
'73 Silver LS4 4 speed
1st track - C/S to WP
2nd track - C/S to WP to PS (inside)
3rd track - WP to A.I.R to A/C - and seperately PS (outside) to ALT


Since the A.I.R is missing you would disregard A.I.R above.
 

MustangMan

New member
Joined
Jun 13, 2007
Messages
3
Location
New Orleans
Corvette
1973 454 4-speed Coupe
Thanks KOPBET,

Looks like I have some pulley problems. Maybe mix matched somehow.
 

6880 Mike

Well-known member
Joined
Jun 30, 2006
Messages
2,723
Location
The Bluegrass State
Corvette
1968 convertible; 1980 L-82
The '73 assembly instruction manual will have belt routing diagrams for all engines/options and will list original part numbers. With the AIM, you should be able to determine whether you're missing a pulley. PS might require and add-on pulley on the crank.

:)
 

Tom73

Well-known member
Joined
Aug 21, 2001
Messages
1,427
Location
Round Rock, TX
Corvette
73 LS4 Coupe - 04 CE Conv
Here you go:

ls4belt.jpg


Just check out The '73 Spot for your needs :D
 

KOPBET

Well-known member
Joined
Jan 31, 2003
Messages
1,355
Location
Tulsey Town
Corvette
'73 Silver LS4 4 speed
The one thing missing is the dual pulley PS with A/C setup (identical to the upper right except includes A/C).

:w
 

Tom73

Well-known member
Joined
Aug 21, 2001
Messages
1,427
Location
Round Rock, TX
Corvette
73 LS4 Coupe - 04 CE Conv
The one thing missing is the dual pulley PS with A/C setup (identical to the upper right except includes A/C).
The A/C with PS is the bottom right and does not use a dual pulley on the PS.

tom...
 

Tom73

Well-known member
Joined
Aug 21, 2001
Messages
1,427
Location
Round Rock, TX
Corvette
73 LS4 Coupe - 04 CE Conv
It clearly says LS4 under the diagram,

If not, please come correct my car.
Sorry, I stand corrected. I saw the L48/L82 at the top of the diagram.

So pulled out my assembly manual and there it is.

Hummmm, makes you wonder why they would have two different belt configurations for the same RPO combo?

tom...
 

Tom73

Well-known member
Joined
Aug 21, 2001
Messages
1,427
Location
Round Rock, TX
Corvette
73 LS4 Coupe - 04 CE Conv
Now I really feel bad. Just went out and popped the hood on mine and looked. I have the two grove PS pulley on my A/C car :(

Think I need to start spending more time with my car :D
 

MustangMan

New member
Joined
Jun 13, 2007
Messages
3
Location
New Orleans
Corvette
1973 454 4-speed Coupe
You guys are great. The pictures/diagrams are just what I needed. This Vette has no AIR pump or idler. The other pulleys seem to be like the diagrams. I should be able to get this thing cold now.

Thanks a million. You guys, this site came highly recommended by another iATN member.
 

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