Hello all,

After cleaning out the ICV, I saw a slight RPM increase at idle. Spraying carb. cleaner on the suspected parts, I found that the leak occurs at the bottom lip of the large round rubber thingy as pointed out in the attached picture (idle raises as I spray to the lip). What's this rubber thing & is there a easy replacement for it ?

Thanks,
Frank.

Attached Thumbnails

 

__________________
'86 560SEL | Silver Ext. / Blue Int. | 201K miles (Apr. 05) | 204K miles (Feb. 06)

The rubber thing is the Bottom half of the air flow meter. It fits over the throttle valve, and there is a steel band as a clamp. If the air leak is not causing problems with starting or idle I think leave it alone.

To replace you would need to remove fuel lines to injectors, remove fuel lines to fuel distributor, unplug eha and position sensor, unbolt and remove air flow assembly from manifold. Than take apart air flow assembly replace rubber part and if it is older car you need a new fame because the new rubber part does not fit.

If it leaks, it is sucking in dirty air -- replace it or at least remove and check the seal!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!