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#1
01-07-2015, 10:37 AM
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1987 300TDT diesel fuel thermostat bypass?
1987 300TDT diesel fuel thermostat bypass? I have a leak at the plastic cover ends of my diesel fuel thermostat. Not sure if if its the o ring or a cracked plastic connector. I want to temporarily bypass the unit. Do I just take the fuel line with the in line fuel filter and attach it it to the base of the lift pump? Do I need to plug anything on the thermostat unit?
http://www.peachparts.com/shopforum/attachments/diesel-discussion/53794d1207002839-92-300d-leaking-fuel-pre-heater-om60x-fuel-system-diagram.jpg connect 43 to 3 and bypass 86 
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#2
01-07-2015, 11:18 AM
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Yes, connect 43 to 3 and bypass 86. Do not need to plug anything.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.  W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html 1 X 2006 CDI 1 x 87 300SDL 1 x 87 300D 1 x 87 300TDT wagon 1 x 83 300D 1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
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#3
01-07-2015, 07:08 PM
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Thanks for the info. Knock on wood but I think that fixed my intermittent stalling out. Must have been occasionally sucking air. There definitely was a leak of fuel from the unit where the plastic nipple mounts in with the clip. I am going to leave it bypassed until I get my splined socket to do my delivery valve seals and tackle everything in one afternoon.
I will know more in the morning when I leave for my morning commute .
Last edited by neumann; 01-07-2015 at 08:00 PM.
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