Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Dave on May 11, 2011, 22:46:59

Title: Loud fuel pump
Post by: Dave on May 11, 2011, 22:46:59

I've got a 67 230sl that runs great, but has a really loud fuel pump.  Any ideas out there?  Thanks Team.

Title: Re: Loud fuel pump
Post by: George Des on May 12, 2011, 02:23:41

Dave,

It is normal for the pump to make a whirring buzz sound. If it is really loud, it could be that some debris got between the vane and the lower plate of the pump scuffing one or the other or perhaps even both. You might try removing the lower plate and taking a look. If they are scored, you may be able to smooth them out by taking some fine valve paste compund and lapping them on a piece of plate glass. If this is an old style pump, it may also be that the ball bearings are running dry . If this is the case, the pump will have to be totally disassembled and the bearings replaced. Hope this helps.

George

Title: Re: Loud fuel pump
Post by: Dave on May 12, 2011, 03:05:28

Thanks George.  It's going on my to do list.

Title: Re: Loud fuel pump
Post by: erickmarciano on May 12, 2011, 05:11:11

when you remove the bottom plate make sure you have a spare o ring on hand in case you need a new one.