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American Motors/1974 (?) 304 engine vacuum lines
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Question
I just picked up a '74 304 Hornet hatchback, the valve cover tag codes out to be a '71 engine, is this normal or do you think the engine was changed? Some of the vacuum lines look like they have been cut and plugged coming off the engine, no lines going to the 3 port valve coming of the thermostat housing and no lines to the ports on the air cleaner housing. Although the car runs OK, it does idle a little rough and there is a strong exhaust smell. Are there any vacuum line diagrams available for a '71-'74 304? Thanks
It is possible the engine has been replaced, it's a simple swap.
As for the vacuum routing, there should be a sticker under the hood showing the hose routing. If not, try this site. It is a 1973 AMC repair manual online: http://www.oldcarmanualproject.com/manuals/AMC/1973/Service/index.html
It also sounds as though you need some carburetor work/adjustment.
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Kevin Pilotte
Expertise
I can answer many technical questions relating to AMC vehicles prior to 1979. I also have experience with Rambler & Nash vehicles.
Experience
I am a former AMC technician, service writer and service manager. I have worked in AMC dealers in Illinois in the 70's. After college, I was a Field Service Rep for American Motors Sales Corporation, working out of the Chicago Zone office. I traveled to AMC dealers assisting in the diagnosis and repair of AMC vehicles. I was also the Area Training Manager for DeLorean Motor Company. I have 10+ years as an Automotive Instructor. I have modified and restored
numerous AMC vehicles. I have been working on AMC vehicles for over 30 years.
Organizations
I have been an ASE Certified Master Technician since 1975. This includes L1. I am also currently a Toyota Certified Master Diagnostic Technician.
Publications
I have articles in "American Motoring", the official publication of the American Motors Owners Association. They are the largest AMC club in the world.
Education/Credentials
I have a certificate I printed out from a website.
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