AboutTodd Puccio Expertise General auto repair,electical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm spacific. I have worked at my current dealseship since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way.
Experience Experience in the area:I have been employed by the same Gm dealer for 18 years and and a ASE master technician. I work at a Pontiac and GMC truck store. Served a a lead technician when dealership was on a team system.
I just recently moved to a Buick,Hummer,Saab Store when my franschise was purchased by this dealership.
Organazations: ASE master techncian
Education/Credentials:High school diploma,2 year vocational school degree
2 year college degree. Associates degree in applied scineces (auto technology)Awards and Honors: GMC master techncian
Question QUESTION: My Question is why does My lower Belt Tensioner Bobble This goes Arond The drive shaft pulley And AC Pully only.
ANSWER: Hi David:
More then likely the spring in the tensioner os weak and making it move up and down. Or the belt is worn out "streached" and it's past what the normal amount of slack the tensione can take up or lastly the a/c compressor is seizing up or the line pressures are to high in the a/c system. Does it do it when the a/c is on only? or all the time?
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QUESTION: It bobbles only when the AC is on.
Answer It can still be any of the 3 issues I mentioned before. Depending on what year this is there may or may not be a mark on the tensioner arm and on the tensioner body and they should line up meaning the belt is not streached and the tensione has the proper amount of pressure on the belt but Not all of them have those "witness" marks on them.
