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
Expert: Todd Puccio Date: 7/23/2008 Subject: top end knock
Question 1996 grand am quad 4, when i start it it sounds normal, but when u rev it up to 2000rpm theres a hard knock in the top end, rev it pass 2000rpm and the knock goes away, tore apart the timing chain to inspect it and everything looked good, then i droped the oil pan replaced the oil pump put it all back together but the knock is still there. thinking it might be a collapsed lifter? is this possible????
Answer Hi Jason:
Yes it's possable but it will not knock it wil more than likely make a ticking noise. I have ssen the housing the lifter go in to wear out and make noise as well when you take it apart inspect for ant scoring in any of the bores where the lifter ride in.
