- Joined
- Sep 4, 2021
- Messages
- 10
- Reaction score
- 7
- My Car
- 73 Coupe, F Code 302 4V, C4, w/ AC
Spring break rolled around and my grandson and I finally had some time to replace the timing chain on the Mustang. It appears to be an original, 55 k mile car. The nylon cam gear looked good and the chain had only a little slop in it. While we had it torn down we replaced the harmonic balancer, water pump, fuel pump and oil pressure sending unit. We cleaned and repainted stuff, too. We started it up, reset the timing, checked for leaks and took it for a ride. Immediately I noticed a vibration so we brought it back in. Long story short, just raising the RPM to 1500 caused a vibration that shook the steering wheel and mirrors. Thinking it had to be the balancer, I put the original back on and the vibration went away. I researched the Dorman part number and it was correct and returned it to Advance Auto where they ordered a replacement. The replacement did the same so I returned it thinking I would just use the original. The original looks good but is 50 years old and I used the original key. All of my research suggests that there was only 1 balancer used until 1982 when it was changed to a 50 oz. The replacement looked a little different (see pic). On the original, the “cookie cutter edge” goes further around the outside diameter and there’s extra weight on the bottom.
Any suggestions or ideas?
Any suggestions or ideas?