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#16
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On My Volvo the Pencil Type Glow Plugs were wired in Series Parallel. Meaning that all the terminal ends were connected in series to a Wire that has the Positive Voltage but the individual Glow Plugs are grounded in Parallel to the Cylinder Head. (This is the same setup that people do when the install the Adapter Pencil Glow Plugs to replace the Filament/Loop type Glow Plugs.) In that system one Plug can go bad and still not cut the electricity to the rest. But to test an individual Glow Plug you need to disconnect it from the Terminal Wire.
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84 300D, 82 Volvo 244Gl Diesel Last edited by vstech; 02-14-2014 at 10:12 AM. |
#17
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I don't see why Stainless Steel Rifle or Shot Gun Bore Brushes would not work. On My own Engine after the Reaming is done you are supposed to tie or hold the Fuel Injection Pump Throttle Lever in the Shutoff Position and crank the Engine and it blows out any loose Carbon particles the fell into the Precombustion Chamber. If you hold the Lever in the Shutoff Position and have someone else crank the Engine be sure to protect your Eyes; even if the minimun you do is to close your Eyes. You would also need a section of Cleaning Rod to mount the Brush on. SHOTGUN BRUSH SIZES; threaded end 5/16x24 inches in the USA. Diameters of the Brushes. 10 gauge 0.775" 12 gauge 0.729" 16 gauge 0.662" 20 gauge 0.615" 28 gauge 0.550" 410 bore 0.410"
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84 300D, 82 Volvo 244Gl Diesel |
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I thought the parts circled in the Pic were the Glow Plugs.
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84 300D, 82 Volvo 244Gl Diesel |
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D911-
The OP has stated that the GPs are loop GPs, so they must be in series. The photo he posted also appears to have a ground wire from the last GP to the block. Also, I don't think the parallel pencil GP had been invented yet when his engine was made. So maybe that photo that you found is of an engine which has been retrofitted with pencil plugs. To the OP- Those pencil GPs were designed to retrofit into the same hole as the old loop GPs. So assuming your loop GPs are the same as later loop GPs (1960s), those pencil plugs would work just fine. But how many times per day do you start your engine? If it is only once or twice, I would say that upgrading to pencil plugs in parallel isn't really solving anything. Who cares if once or twice per day you save 20 seconds running the GPs? If definitely sounds like you need to ream your holes. An earlier post of mine in this thread had a link to threads where I give the dimensions of the reamer. So if you are on a budget, get a drill bit of similar size and mark it to ensure you don't go in too deep. I will PM another option as well. And adjusting the valves, as has been suggested, would be good use of your time. Good luck.
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
#20
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BOSCH 0 250 001 016 (0250001016) Glow Plug They might be close cousins - they might be same - they might not. I can't find much information about the OM321 out there on the interweb. The specifications for the glow plugs that MIGHT be the same are here => https://www.bosch-automotive-catalog.com/public/catalog/products?p_p_id=BoschWSRP&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&p_p_col_id=column-1&p_p_col_count=1&_BoschWSRP_wsrp-urlType=blockingAction&_BoschWSRP_wsrp-navigationalState=%2FWFS%2FAAGLOBAL-AA-Catalog-Site%2Fnl_NL%2F-%2FEUR%2FViewSearchProduct-Detail%3Bpgid%3DD41D8CD98F00B204E9800998ECF8IS7qrzXw%3Bsid%3Dul2b0DfTYl2TkWUtj8kXKjhYmvJYN_zt2Z0%3D&_BoschWSRP_proxyportlet-remoteInvocation=true
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#21
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Are you sure which version you have got? How many hours are on the old nozzles? When was the pop pressure and spray pattern checked last time? Gruß Volker |
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That preheating.pdf document that I linked to in my second post describes how the older (1950s) GPs are different than our "modern" loop GPs. It describes how the oldest ones used some short of spiral filament (capable of handling 1.4 volts), versus the round wire loop that we are more familiar with (capable of handling 0.9V). It does not say that the threads were different, nor the overall dimensions being very different, which is why I made my assumption. So yes, it is a bit of a leap of faith since that document I found discusses only the om621 and om636, but the era is the same so it is not too unlikely that MB would re-use the same prechambers, gps, etc.
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
#23
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#24
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Mercedes-Benz OM 300 (klein) It might be wrong though 'tis after all wikipedia(!)
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#25
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http://www.peachparts.com/shopforum/3286276-post10.html he has direct injection on his engine. I did remember that on a research about the OM321V I found out that Mercedes tried several 100 engines with DI instead of IDI. So I thought maybe the thread starter has an engine with direct injection that survived until now. Although I think it is most likely a prechamber engine. Here is some information about it with pictures. The birth of a legend: the 300 engine series, first unveiled in 1949, is a major advancement | Daimler Global Media Site > Classic > Daimler AG > Technology Gruß Volker |
#26
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"The glow plugs have a small wire loop that glows and once inside, resides in a small pre chamber."
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
#27
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As you said, the OPs OM321 is likely an IDI engine.
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1968 220D, w115, /8, OM615, Automatic transmission. My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear). |
#28
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#29
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I know this because I measured the thread of four glow plugs I got that were wrapped in packaging dated 1939. Apparently, they were for a 260D Benz taxi (??). There's a German company named Beru that makes glow plugs and spark plugs. They have this cage filament glow plug. Don't know if they still make them, but I have seen these in the past two years, so they might be able to be procured in Europe, where people don't dispose of things as readily as here.
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
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