Need help - vibration remained even after changing the mounts

elraj · 03-20-2005, 04:24 AM

Hi guys,
Hope you can help, I've searched thru the forum and read abt engine mounts but mine seems to be unique case:

My car (Altima SSS-G '96 Auto with stock SR20DE) used to have bad engine vibration carried up to steering wheel and also to the dashboard. So, I suspected my engine mounts were out.. So I replaced all 3 mounts (front right (hydraulic type), front left & rear) with brand new OEM mounts.
And when I looked at the old one.. true enough the rubber compound in the mounts were already hardened..
Now, the vibration had reduced around 70%.. but there is still noticable
vibration (still irritating) on the steering wheel and also on the
dashboard (especially when the A/C is on)..
But before that, I've done some engine tune up at a local Nissan dealer.. so I guess it's not the engine timing.. What else could cause the car to vibrate at idle?

Thanks alot !

pertuzian · 03-20-2005, 01:03 PM

Does the roughness occur at idle only or at all speeds?

If idle-only, is your idle speed correct? It should be at about 700-800 rpm.
If not, I might look at the accessory drive area first.

DP

elraj · 03-20-2005, 09:11 PM

Quote:

Originally Posted by pertuzian

Does the roughness occur at idle only or at all speeds?

If idle-only, is your idle speed correct? It should be at about 700-800 rpm.
If not, I might look at the accessory drive area first.

DP

Hi thanks,
The vibration only occurs at idle. e.g. when I stop at traffic lights.
The idle speed is at around 850 rpm. When the A/C is on, the rpm goes down but within 2-3 seconds, it gets adjusted back to around 950 - 1000 rpm.
Is this OK ?