can anyone tell me if this bypass valve is the repairable (re-stretch the spring to 27mm) or the non-repairable type. I copied this listing from another thread

MB# 6010700146
http://catalog.peachparts.com/item.wws?sku=6010700146

Application list:

OM601. 911, 912, 921, 940, 941

OM602. 911, 912, 930, 931, 938, 939, 940, 941, 942, 946, 947, 948, 961, 962, 990, 991, 993

OM603. 912, 913, 931, 960, 961, 962, 963, 970, 971, 972

OM616.963

OM661.911

OM662.911

it is not repairable.

And furthermore, I think our dear Whunter bought the last remaining serviceable relief valves from MB.

almost all of those engines never had serviceable valves.

Last I checked there where still 8 in north America.






.

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Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
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Dynamometer.
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1985 300SD
1983 300D
2003 Volvo V70

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Did anyone ever figure out whether there's a source for the spring for the early type? I know at one time someone has acquired a couple springs.

Anyone know?

steve a

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Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others

I have the new springs on my desk, the spring companies have negative or no response.

I am surprised that some one hasnt come up with the suggestion of just doing away with the "rare valve" and replacing it with a basic adjustable pressure relief valve. They are use in all sorts of applications & normally adjustment is just by a small locking screw. There is one on the diesel return of an old Leyland diesel we have in a road grader. If it wasnt so cold & wet outside I would go take a pic of it !!

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Someone did suggest a replacement in that long thread, it was per suggestion from a Bosch shop that the existing unit be replaced with one from a VE pump which was a screen and a small restricted orifice.

I'm checking fuel pressure on my car later today to see if this is an issue.

As a side, I assume the non-serviceable can be replaced with the semi-serviceable unit?

steve a

__________________
Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others

Yes, perhaps just get one from an earlier wreck if required. There must be a common spring out there that could be tweeked if required to replace a broken or very tired spring.

does anyone know if the valve out of a cummins (bosch) p7100 or vp44 injection pump will work? The specs are 17-35 psi (p7100) and 10-15 psi (vp44). I found a couple adjustable ones on ebay as well for the p7100 pump. I cannot find specs on the thread size or length of the valve. Both look the same as the Merc ones. They are also readilly available and low cost.

Here's what I found in my Bosch In-line FI Pump Yellow Jacket book from '03 about the overflow valves.

While it doesn't talk about any specific pump it does suggest that restrictive pressure should fall somewhere between 30-43psi (2-3bar).



steve a

__________________
Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others

Layback, can you find us a picture online and post it?

It looks a bit like this but it doesnt have the flange & fasteners, everything comes out the adjustment bolt hole.

http://www.google.com.au/imgres?imgurl=http://1.bp.blogspot.com/_YOjepBEvjc8/RtFJB1RGcKI/AAAAAAAAAfk/KxnSkQyz5ww/s320/valve101.gif&imgrefurl=http://webwormcpt.blogspot.com/2008/01/useful-documents-related-to-pressure_07.html&h=320&w=285&sz=87&tbnid=QNZJsvPeF87sdM:&tbnh=118&tbnw=105&prev=/images%3Fq%3Dpressure%2Brelief%2Bvalve&zoom=1&usg=__xnSJuEY4aM-mULzzEE5Z9_MrTdM=&sa=X&ei=oFtvTKH4FoHKvQObkY1C&ved=0CDkQ9QEwBA

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

It would work on the principle of the adjustable blow off valve they use on the waste gate of the turbo. I have seen them on e-bay.


sort of on the order of this
Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

In the pic in post #17 item #1. Hunter said the new ones are like the pic. There is no screw on the end to get at the Spring.

In the manual they have the pressure of the Fuel Pressure Relief/Overflow valve as being 1.3 bar (about 18.35 psi) at 3000 rpm.
Idle 0.6-0.8 bar (8.7-11.6 psi).

Here is a test no one I have read has done. If you hook a Vacuum Gauge at the Lift/Fuel Supply pump inlet it supposed to pull 0.1 bar of Vacuum. If not it has you should replace the suction and delivery valve or the complete Lift Pump.

__________________
84 300D, 82 Volvo 244Gl Diesel

If you wanted to measure IP gallery pressure, would you tap into the line from the big filter to the IP?

Sixto
87 300D