Engine Virbration

[bumpstop325 0]

My engine has developed an unusal engine vibration from idle to about 2000rpm.

it is a m30b35 (from 1992, 735i) with a G424 gearbox (4spd, from e23 732). When the engine was tranplanted into my e30 (1984) it had an auto. however when this blew up, I changed it to manual at start of 2007.

Every since i changed it to manual, it was always alittle slow to rev from idle. I think due to it still being an auto ecu.

The vibration is still there no matter wheather it is in gear (driving around town), in neutral (clutch out), or with the clutch in.

I am suspecting either a big end bearing or loose flywheel bolts.

any ideas?

[BM WORLD 1288]

maybe if you have the dual mass flywheel it has a stuffed centre bush, or maybe a one of the clutch finger springs has broken .

[bumpstop325 0]

A broken clutch finger is possible. As I have used the old e23 finger plate and release bearing.

Thinking about it more, the clutch pedal seems to giggle abit and does not release smoothly.

Edit; Its just a standard flywheel from the e23.

Edited October 22, 2009 by bumpstop325

[BM WORLD 1288]

yes if your pedal feels funny , then get the gearbox off .

most likly std solid flywheel .

also the pivet point for the clutch fork wear out ,and cause the cluctch fork to go crocked ,

also i have had one of the 3 metal tension springs break on the clutch cover .

sort it quick before you stuff a gearbox/engine bearing or seal etc

[twisted 45]

Broken Fan blade?

Edited October 22, 2009 by twisted

[BM WORLD 1288]

Broken Fan blade?

yes that too

[bumpstop325 0]

cheers for that.

lucky i have an electric fan only.

I will save up for a new finger plate now. It will have to it in a months time when my thesis is handed finally and keep the car in the garage until then.