Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: gnj588d on March 09, 2011, 21:37:21

Title: cold start valve leaking
Post by: gnj588d on March 09, 2011, 21:37:21

when I start the engine I have a fuel leak at the base of the start valve it stops once the engine is running,looks like a leaking gasket or seal ring?problem if so can I buy the gasket or seal on its own.its not coming from the small screw.Many thanks Mike

Title: Re: cold start valve leaking
Post by: ja17 on March 10, 2011, 02:16:04

Hello Mike,

You should make sure the CSV is not leaking all the time. Turn the ignition on, (electric pump running) engine off, and remove the small 7mm bolt. If fuel leaks more than an occasional drop. The unit is faulty. Just because it is not leaking when the engine is running is not valid, since the suction from the engine will draw leaking fuel into the intake and cause a rich idle.

Title: Re: cold start valve leaking
Post by: gnj588d on March 10, 2011, 10:17:52

Hi Jo done as you suggested and there is no fuel leaking when I remove the 7mm screw,with the pump running its leaking from the joint between the magnet and the body its screwed to {between the two faces] any ideas?Cheers Mike.

Title: Re: cold start valve leaking
Post by: jacovdw on March 10, 2011, 10:38:48

There is a small (and very expensive) o-ring that is responsible for a seal between the CSV body and the solenoid.

Part number A001 997 75 40 I believe.
Very easy fix if you can get over the pain of the price (13 Euro) for such a small o-ring...

Title: Re: cold start valve leaking
Post by: dseretakis on March 10, 2011, 12:34:05

If I remember correctly there us a paper gasket where the CSV mounts to the manifold. This is also very expensive for what it is. Next time I will remove the old gasket and trace it on some paper gasket material to make my own.

Title: Re: cold start valve leaking
Post by: Naj ✝︎ on March 10, 2011, 13:07:30

Quote from: dseretakis on March 10, 2011, 12:34:05

If I remember correctly there us a paper gasket where the CSV mounts to the manifold. This is also very expensive for what it is. Next time I will remove the old gasket and trace it on some paper gasket material to make my own.

The gasket is used on later (70/71) 280s with a smaller CSV.

Early ones use a rubber 'O' ring.

Naj

Title: Re: cold start valve leaking
Post by: dseretakis on March 10, 2011, 14:37:04

Thanks for the clarification. I was getting confused!

Title: Re: cold start valve leaking
Post by: gnj588d on March 10, 2011, 16:02:51

I have taken the c.s.v. off and found the little rubber seal has disintergrated,what running problems would that have caused. thanks to you all for the input, you saved the day again.Take care Mike ;D

Title: Re: cold start valve leaking
Post by: gnj588d on March 19, 2011, 12:31:05

Fitted the new o ring and no more leaks,job done, thanks again everyone, especially Naj