[diesel_mercedes] Fuel Overflow Valve

 

No pix yet but ;

I removed the pressure release valve that creates the IP's internal pressure of 15 # +/- , discovered it to be full of crud and the tiny delicate coil spring was worn out ~ bell mouthed where the ball bearing fits in one end and shiny almost paper thin about 1/2 way along it's side due to rubbing .

These are supposed to be checked periodically as the internal pressure is what fills the delivery valve elements .

When first I remove it I tried to blow through it by mouth , shouldn't be possible but I was able to , indicating low internal IP pressure .


I searched around until I found a spare used FOV and tested it , couldn't blow through it so I took it apart and found some very fine silty crud in it , wire brushed the exterior until it shone , then used aerosol brake leaner and Q-Tips to clean the inside , re assembled and was no longer able to blow though it so I installed it , bled the system (whew,took a long time)  , re started the engine and immediately noticed smoother idle and better throttle response off idle . This cleaning allows the mechanical fuel transfer pump to work harder and fill the IP's elements faster so the engine runs better and smoother with a *slight* power increase .


There's more to all this and as soon as I can figure out how to take close up photos , I'll re post with more details , this is an easy DIY thing anyone can do with two wrenches , 14 and 17 MM plus clean lint free rags and some time .                                                                                                                                                                                                     -Nate

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[diesel_mercedes] Re: CJ7 / 240D injector questions

 

 .

-Nate


Yes Bogy ;

They should only spray a nice even fog .

If you pump the handle less than enough to make them pop , there should be _NO_ weeping of fuel nor droplets forming (" drooling ")  .

Now , go enjoy that BIG burst of power ! .

I set up my new Pop Tester and discovered I put the connecting pipe(s) away nice and safe , NOT in the shipping box nor the milk crate I'm storing the Tester in until I get my stand built....... .

I hate it when I hide my things and tools so well , I can't find them again .

-Nate
         Bogy   wrote :

So I got a gauge for my injector tester and boy were they mismatched. 2 were virtually identical at 1850 psi with a good pop and fog spray - no stream no matter what i did. It was a fog spray or nothing. Of the other 2, 1 was foging at 1500 psi and the other one was mostly peeing unless I pushed really hard. So I got all 6 of my "good" spares out and checked them. I found 2 more that matched the 1850 psi pop/spray. Those 4 were installed and WOWSERISOS - I could tell the difference backing the rig out of the garage. Also I don't know how accurate my new gauge is but I am sure I have a "matched and balanced" set in the engine now. So question #1: Just how important is the 1950 pop pressure? Obviously balance is better than imbalance. But is 50 or 100 psi that critical up at those pressures?

Of the 6 "new" spares several of them pop at near 1800 psi but I can, if I am very careful, get them to pee a stream. They will pop and spray if I push hard enough, but they will also emit a stream if I am careful in pushing "just enough". One pops at 1950 but it is too easy to get it to stream instead of spray. Am I right in believing that it should be a pop/spray at pressure or nothing?

Thanks in advance,
Bogy.
 
"Hardware eventually fails. Software eventually works"                 - Michael Hartung



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Re: [diesel_mercedes] CJ7 / 240D injector questions

 

Bogy,

No injector peeing allowed.

Best case, even spray, all balanced within the spec'd pop pressures, though balanced and close OK for now, especially when you say you don't know how accurate the gauge is.

Rob

Garden Grove, CA


On 7/13/16 9:28 PM, Bogy Wan Kenobi polespearbogy@yahoo.com [diesel_mercedes] wrote:
So I got a gauge for my injector tester and boy were they mismatched. 2 were virtually identical at 1850 psi with a good pop and fog spray - no stream no matter what i did. It was a fog spray or nothing. Of the other 2, 1 was foging at 1500 psi and the other one was mostly peeing unless I pushed really hard. So I got all 6 of my "good" spares out and checked them. I found 2 more that matched the 1850 psi pop/spray. Those 4 were installed and WOWSERISOS - I could tell the difference backing the rig out of the garage. Also I don't know how accurate my new gauge is but I am sure I have a "matched and balanced" set in the engine now. So question #1: Just how important is the 1950 pop pressure? Obviously balance is better than imbalance. But is 50 or 100 psi that critical up at those pressures?

Of the 6 "new" spares several of them pop at near 1800 psi but I can, if I am very careful, get them to pee a stream. They will pop and spray if I push hard enough, but they will also emit a stream if I am careful in pushing "just enough". One pops at 1950 but it is too easy to get it to stream instead of spray. Am I right in believing that it should be a pop/spray at pressure or nothing?

Thanks in advance,
Bogy.
 
"Hardware eventually fails. Software eventually works"                 - Michael Hartung




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Posted by: Aleph93 <aleph93@ca.rr.com>
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[diesel_mercedes] CJ7 / 240D injector questions [1 Attachment]

 
[Attachment(s) from Bogy Wan Kenobi included below]

So I got a gauge for my injector tester and boy were they mismatched. 2 were virtually identical at 1850 psi with a good pop and fog spray - no stream no matter what i did. It was a fog spray or nothing. Of the other 2, 1 was foging at 1500 psi and the other one was mostly peeing unless I pushed really hard. So I got all 6 of my "good" spares out and checked them. I found 2 more that matched the 1850 psi pop/spray. Those 4 were installed and WOWSERISOS - I could tell the difference backing the rig out of the garage. Also I don't know how accurate my new gauge is but I am sure I have a "matched and balanced" set in the engine now. So question #1: Just how important is the 1950 pop pressure? Obviously balance is better than imbalance. But is 50 or 100 psi that critical up at those pressures?

Of the 6 "new" spares several of them pop at near 1800 psi but I can, if I am very careful, get them to pee a stream. They will pop and spray if I push hard enough, but they will also emit a stream if I am careful in pushing "just enough". One pops at 1950 but it is too easy to get it to stream instead of spray. Am I right in believing that it should be a pop/spray at pressure or nothing?

Thanks in advance,
Bogy.
 
"Hardware eventually fails. Software eventually works"                 - Michael Hartung



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[diesel_mercedes] window motors

 

I have a 1984 mercedes 300D and the driver window will no longer go up or down. What year motor will fit this car. PickNPull is having a sale on Thursday and would love to go find on and fix this problem. 


I this common? Is there something other than the motor that could cause this. 


thanks for the help, Nick

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[diesel_mercedes] Re: Silvia 4 sale soon: 1984 300SD - 300K mi

 



Has she stopped driving ? .

I'm looking at this too a few years hence , not sure what to do as I doubt my Son wants any of my old junk .

-Nate
       Brian   wrote :

Well, our hearts are going pitter patter of course. Sadly, we will be moving to Washington in 2017 and my wife is saying, "are you going to leave one car or both cars behind?" - so it does not look very promising for me, although tempting nonetheless.

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[diesel_mercedes] Re: 240d & trans for sale

 



Dang ;

I'm sorry to hear of your injury .

Take it slow and easy of the recovery ~ I know folks who got active before the Dr. said O.K. and would up with permanent pain and limited movements .

-Nate
        Don   wrote :

I have a great running '77 240D engine and 4 speed std trans for sale in central North Carolina.  Car was a rust bucket so I scrapped it.  Engine is complete with starter, alt and ac compressor.  I also have the shifter and the  section cut out of the floor to make a conversion into another vehicle easier.


.I was going to put it into an MGB but I'm 69 years old and tore the rotator cuff in my shoulder.

I am told it will never be the same so I am selling  "projects" I will not be able to finish.

MGB, engine or trans can be sold separately.

You can contact me @ 704-577-0898

Don

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Re: [diesel_mercedes] Re: Silvia 4 sale soon: 1984 300SD - 300K mi

 

I have had mine (Mary) for 25 years, and my wifes (Martha) for 15 years. I picked up Martha for it's engine to put in Mary, but it ran so well at 270,000 miles I decided to keep it and got another engine from a rust bucket outside Minneapolis.

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