Pa'svette

The PO replaced the alt. with a Delco 61 amp #1100542. The book calls for a Delco 61 amp #1100544.
My problem is the 542 alt. sets so low that I can't get the belt off without taking the mounting bracket off because it hits the valve cover. Also it sets about 3/16" back too far so the belt rubs the power steering pump.
I can't find a correct number alt. Has anyone else run into this problem or am I missing something?
Thanks, Bob

Go Vette Go

A picture would help. I don't think the alternator housings varied from 69 - 78 so the mountings would be the same. The early mounting brackets were different then the later C3's. Attach a picture and I will compare it to my 76.

John

The Punisher

I thought the '75 had a 40 amp alt.

Pa'svette

I'm puter-stupid so wife does the picture thing and not here now. The mounting bracket is cast and bolted directly to the head so I don't think that is the problem. I have checked the power steering pump and brackets. Nothing looks bent and the p/s belt lines up but the alt. belt doesn't.
I'll try to get a picture asap.
Thanks

gungatim

wrong brackets or wrong pulley size.

are they not both 10Si cases?

Go Vette Go

AC equipped cars required the higher amp alts.

Pa'svette

I hadn't thought of that but you may be right. I remember now that years ago I replaced the alternator on an 84 Vette. and had to switch the pulley from the old alt. to the new one.
Do you know size pulley a 1975 takes?

Paul L

You may have to "clock" the alternator.

http://www.hotrodders.com/forum/re-c...or-104514.html

lvmyvt76

custom valve covers, that are taller??? had the same problem on my 76, put a little longer belt to fix.