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Forum: Vintage Mercedes Forum

03-27-2020, 07:52 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

Thanks Graham, I lift is a game changer indeed...

Thanks Graham,
I lift is a game changer indeed especially if you are getting older...and we all do.
The hurdle to crawl underneath is just gone and you get so much better access to anything...

Forum: Vintage Mercedes Forum

03-25-2020, 04:52 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

To all I have the renovated pump back,...

To all

I have the renovated pump back, cleaned out that tank (think the o-ring at strainer was a 36 x 3) and everything works perfectly fine now.
Engine started nicely and now even at very cold...

Forum: Vintage Mercedes Forum

03-25-2020, 04:48 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

Hi fonzi, you need to rebuild this pump...

Hi fonzi,

you need to rebuild this pump entirely and get the check valve and overflow valve to work as it should.
This pump is not made rebuilder-friendly though. You need to bend open the cold...

Forum: Vintage Mercedes Forum

03-10-2020, 07:00 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

Thanks Idle for your comments about cleaning the...

Thanks Idle for your comments about cleaning the gunk out of the tank.
That is what I had in mind while being in the area anyhow, car on the lift.
I'll drain the fuel and try to clean that tank. ...

Forum: Vintage Mercedes Forum

03-10-2020, 06:57 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

I have set up a rig for D-Jet fuel pump...

I have set up a rig for D-Jet fuel pump performance testing.
I am testing with calibration fluid.
The pump S-port will be fed by a tank (5 gallon bucket). Return port line will go straight back...

Forum: Vintage Mercedes Forum

03-08-2020, 10:50 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

Thanks Idle, my question about the strainer...

Thanks Idle,

my question about the strainer seal in the W109: I think it is a common o-ring for the strainer
A1114700686. O-ring has MB number 1109970145. Does anyone know the o-ring size...

Forum: Vintage Mercedes Forum

03-07-2020, 09:00 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

I machined the Check Valve insert (it is the...

I machined the Check Valve insert (it is the front part of the this regulating valve) and it is reasonably tight when tested with air. I think the check valve can work this way...
The overflow...

Forum: Vintage Mercedes Forum

03-07-2020, 11:31 AM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

check valve

Thanks Frank

yes i understand what you are saying.
Now the original 'check valve' is not really a check valve (working by the pressure within the pressure line). This one is working only when...

Forum: Vintage Mercedes Forum

03-07-2020, 09:50 AM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

Well thank for the comments. When I fiddled...

Well thank for the comments.

When I fiddled with the fuel pump I saw that all hoses were old and hardened down there. This also made me believe I'll do a bigger renovation and replace all rubber...

Forum: Vintage Mercedes Forum

03-06-2020, 10:52 PM

Replies: 16

W109 4.5 not starting after winter, no fuel

Views: 1,662

Posted By werminghausen

W109 4.5 not starting after winter, no fuel

With the warm spring weather I wanted to start my W109 4.5 and it didn't,
no matter what. I checked spark and there was spark.
I sprayed starter fluid and engine fired but not well... died.
I...

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