'67 L79 Belt problems (again)
A couple of weeks ago, I posted a thread about problems with a Quanta reproduction belt not fitting my '67 L79 with P/S. Long story short, I had the wrong pulley on the P/S pump. I ordered the proper pulley from LIC and installed it. Everything is now as it should be as far as the P/S goes. I then tried to install the alternator belt from Quanta. It is much too short. After looking things over, it is obvious I have the wrong alternator adjusting bracket. The curve does not match the radius of the alternator as it moves through it adjustment "sweep". It is so far off that it was bent to mount on the front of the mounting ear on the alternator to be able to get any adjustment at all. I've got the proper bracket on order now.
Even if I take the adjusting bracket off, the alternator belt appears to be too short. So now I am thinking I may have pulley problems. Today I took the pulleys off to check them out. Here is what I have :
Water pump pulley - 3890410 CT - This is correct for an L79 according to the AIM. Some of the replies to my earlier thread say this is incorrect and the pulley should be a 3770245. Can anyone clear this up?
Crankshaft pulley - 3850838 BG - Acdcording to the AIM this is the correct pulley for a car with P/S and A/C. I believe the AIM is incorrect on this, since it lists 3751232 as the crankshaft pulley for P/S alone. The 3850838 pulley is the basic pulley that goes on first with two grooves; it is all that is needed if A/C is not present. The 3751232 is a single groove pulley that is made to mount in front of the 3850838 pulley. It is required on A/C L79's that use the flat (non-cast) P/S pulley, as shown in the AIM. They obviously have it backwards.
So now, if I remove the 3751232 pulley, everything should be all right.
Nope, the alternator belt is still obviously too short. In my earlier thread, someone mentioned that some of the L79 Quanta belts may be the wrong size. Is this so, and is the L79 non-A/C alternator belt one of them?
After all I've gone through, the time I've owned the car (25 years), and the shape everything is in, I'm starting to think that maybe late in the model year (the car is a late march build) that they ran short of the proper L79 parts and used parts from either an A/C L79 or a base motor car.
Any thoughts?
Even if I take the adjusting bracket off, the alternator belt appears to be too short. So now I am thinking I may have pulley problems. Today I took the pulleys off to check them out. Here is what I have :
Water pump pulley - 3890410 CT - This is correct for an L79 according to the AIM. Some of the replies to my earlier thread say this is incorrect and the pulley should be a 3770245. Can anyone clear this up?
Crankshaft pulley - 3850838 BG - Acdcording to the AIM this is the correct pulley for a car with P/S and A/C. I believe the AIM is incorrect on this, since it lists 3751232 as the crankshaft pulley for P/S alone. The 3850838 pulley is the basic pulley that goes on first with two grooves; it is all that is needed if A/C is not present. The 3751232 is a single groove pulley that is made to mount in front of the 3850838 pulley. It is required on A/C L79's that use the flat (non-cast) P/S pulley, as shown in the AIM. They obviously have it backwards.
So now, if I remove the 3751232 pulley, everything should be all right.
Nope, the alternator belt is still obviously too short. In my earlier thread, someone mentioned that some of the L79 Quanta belts may be the wrong size. Is this so, and is the L79 non-A/C alternator belt one of them?
After all I've gone through, the time I've owned the car (25 years), and the shape everything is in, I'm starting to think that maybe late in the model year (the car is a late march build) that they ran short of the proper L79 parts and used parts from either an A/C L79 or a base motor car.
Any thoughts?
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