Anyone experience vibration at idle?

[britlude]

I reckon my car now vibrates slighty at idle, particularly when cold. Only noticed it after I had the crank pulley & auxiliary belts changed. Also a momentary resonance at 1200rpm when pulling away in first gear (can't replicate it when stationary in neutral i.e. when engine's not under load).
Car's running absolutely fine (did >1300 miles on the recent Europe Tour without issue).

see post 2!!!!! alternator belt needs tightening!

[andystevo]

see post 2!!!!! alternator belt needs tightening!

ok, ok - belt tension gauge just bought on ebay.
Great excuse for buying yet another garage tool which I'll likely never use again!

[jamieburke]

A friend suggested it could be the plugs- apparently they don't like a lot of cold starts which, with how little my car is used, counts for a lot.

ill try it and report back

[Nick Graves]

I thought that the engine was naturally a little unbalanced at idle?

It's a 90 degree V6, which is imbalanced even with fudges like offset crankpins and is why it idles like a three-pot and the steering column does vibrate in harmony, especially when cold.

I find it rather an endearing characteristic, its growly rather rough (for a V6) nature. The Toyota V6 in the Evora was just a bit bland.

The J35 in the Leg End has the correct 60 degree included angle and is very smooth and silky. Still has a muted growl in VTEC, though.

In NSX-Ts, it's even more pronounced.