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#21
Mechanicals / Fuel System Questions
Last post by sbetts - 14 April 2024, 03:34 PMReading about the costs under "Common Fail Points And Fixes" in the article below makes reworking a D-Jetronic system that has been sitting for 20 years a bit financially daunting.
What is the likelihood that I'll need to replace the Engine Control Unit, Manifold Pressure Sensor, or injectors? Are the costs actually that high for parts? Can I refurbish these parts instead or replacing them?
https://www.hemmings.com/stories/your-quick-guide-to-the-bosch-d-jetronic-k-jetronic-and-ke-jetronic-fuel-injection-systems/
What is the likelihood that I'll need to replace the Engine Control Unit, Manifold Pressure Sensor, or injectors? Are the costs actually that high for parts? Can I refurbish these parts instead or replacing them?
https://www.hemmings.com/stories/your-quick-guide-to-the-bosch-d-jetronic-k-jetronic-and-ke-jetronic-fuel-injection-systems/
#22
Mechanicals / A/C compressor confusion? 79 3...
Last post by 79W116 - 14 April 2024, 01:44 PMI'm sure for a few of you experts out there this will be an easy one, but I am stumped!
I purchased my '79 300SD about 5 months ago, and an indy dealer switched it from R12 to R134 at that time with the PPI and other work before I got it to my house. It worked fine as a quick test when i got it, but was winter of course here in Michigan.
I installed the Hamilton upgrade kit a few weekends ago and now everything works, except the compressor. Although since its been winter and I don't know if its worked in the last 3 months cause why would I have it on in 20 degree weather.
The switch on the main panel in the center console broke recently (spring housing gave way on a corner), but luckily i found out that i can just flip the front toggle upside down and flip the "on" and "off" inserts and ball and spring, and it tests fine with my multimeter.
Next, i had a separtate motorcycle battery that i tapped the leads directly to the A/C compressor and the clutch worked great everytime it got power.
From the receiver-dryer hooking the blue with green wire from the pressure switch to the blue wire from the temp switch makes the fan go on fast and constant, but not the clutch engage. and hooking up the red with green and blue (pressure switch) to the blue wire on the temp switch makes the fan go on in cycles (surging on and off) but again, no clutch engagement.
I tested both fuses that are dangling in the fuse box area, and every single fuse in that little box as well. All good.
I'm sure this is an easy one that I'm missing, please someone tell me what my next step is. I would be very appreciative.
I purchased my '79 300SD about 5 months ago, and an indy dealer switched it from R12 to R134 at that time with the PPI and other work before I got it to my house. It worked fine as a quick test when i got it, but was winter of course here in Michigan.
I installed the Hamilton upgrade kit a few weekends ago and now everything works, except the compressor. Although since its been winter and I don't know if its worked in the last 3 months cause why would I have it on in 20 degree weather.
The switch on the main panel in the center console broke recently (spring housing gave way on a corner), but luckily i found out that i can just flip the front toggle upside down and flip the "on" and "off" inserts and ball and spring, and it tests fine with my multimeter.
Next, i had a separtate motorcycle battery that i tapped the leads directly to the A/C compressor and the clutch worked great everytime it got power.
From the receiver-dryer hooking the blue with green wire from the pressure switch to the blue wire from the temp switch makes the fan go on fast and constant, but not the clutch engage. and hooking up the red with green and blue (pressure switch) to the blue wire on the temp switch makes the fan go on in cycles (surging on and off) but again, no clutch engagement.
I tested both fuses that are dangling in the fuse box area, and every single fuse in that little box as well. All good.
I'm sure this is an easy one that I'm missing, please someone tell me what my next step is. I would be very appreciative.
#23
Mechanicals / Re: 280SE engine mounts
Last post by hamidagha - 14 April 2024, 01:00 PMHi all. I am bumping this up again as I am not sure these new mounts I have fitted are ok. Any advice would be appreciated. Thanks
#24
Mechanicals / Re: Audio head unit
Last post by rumb - 14 April 2024, 12:22 PMWhat part do you need? There are just a few wires for electricity and then all the speaker wires.
Also what radio do you have?
https://www.beckerautosound.com/
They sell some harnesses also.
#25
Mechanicals / Re: How to manually crank engi...
Last post by Max-NL - 14 April 2024, 09:27 AMYou will need a 27mm socket. I would recommend a deep socket and a short extension.
#26
Mechanicals / Audio head unit
Last post by Magyar - 14 April 2024, 07:45 AMHi, does anyone know where I can buy a head unit harness for a w116 280se?
Thanks
Thanks
#27
Mechanicals / Re: How to manually crank engi...
Last post by Pete49 - 13 April 2024, 11:41 PMoops double post
#28
Mechanicals / Re: How to manually crank engi...
Last post by Pete49 - 13 April 2024, 11:39 PMI would add some light weight oil via the plug holes and let it sit for a while before trying to crank it. You would need to do a fluids before starting anyhow.
#29
Mechanicals / Re: How to manually crank engi...
Last post by daantjie - 13 April 2024, 06:53 PMFor starters you need to remove all the plugs so you're not fighting compression. You need a long wrench as well. Turn clockwise facing the engine. There is a large nut on the crank pulley for which you need correct socket and extensions as the nut sits pretty deep.
#30
Mechanicals / How to manually crank engine
Last post by sbetts - 13 April 2024, 05:16 PMHello,
I have a 1974 450SEL than has not been driven in over 20 years. I want to see if the engine will move, but have never cranked an engine with a wrench. How do I? It looks like there is a plastic white cover over the crankshaft end, but before I pry it away I figured I'd check with you all to make sure that is the correct place to do this, and to hear other suggestions. What size socket would I need?
I have a 1974 450SEL than has not been driven in over 20 years. I want to see if the engine will move, but have never cranked an engine with a wrench. How do I? It looks like there is a plastic white cover over the crankshaft end, but before I pry it away I figured I'd check with you all to make sure that is the correct place to do this, and to hear other suggestions. What size socket would I need?