Slight vibration on GT40 engine

[dwsa]

Idles fine at 650, as revs increase to about 750 the fuel cell shakes quite violently on its bracket, slightly higher revs it's fine. Top end speed is fine, no other problems. Am I worrying over nothing?? Thanks.

[ryanandrews]

RE: Slight vibration on GT40 engine

crank itupto 4500-4800 rpm........make the passengers shake!.........loose bolts?.........engine trsnny mounts loose?............

[SGY]

RE: Slight vibration on GT40 engine

Check your plugs, plug wires, cap and rotor. I had a similar problem on my Excaliber motor. Turned out it was the cap and rotor. You might have a similar "mis".

[dwsa]

RE: Slight vibration on GT40 engine

Fixed, it was the harmonic balancer / damper.

[harddock]

Re: RE: Slight vibration on GT40 engine

Fixed, it was the harmonic balancer / damper.

what did you do/ tighten? replacce?

[SGY]

RE: Re: RE: Slight vibration on GT40 engine

Dwsa, give us more info on this. What did you do to fix the HB/damper?