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#1
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1st time fuel filter change
So I changed my fuel filters this afternoon. It went something like this: changed the prefilter, unscrewed the main filter, emtied it into a gas can, put new filter on, took new filter off cause I forgot to fill it w ATF, put new filter w ATF on, primed the system, and started the car. She fired right up.
Shut the engine off, and looked for leaks. Found one from the big hex bolt. tightened. restarted. still leaking. I repeated that a couple of times. The car wouldn't start after the second "leak check". Still won't. So, what'd I do wrong? It was my first time changing a fuel filter that wasn't attached to a lawn mower. There's a chance that I had the wrong main filter. It was a made in spain Bosch. The filter that came off the car was a Hengst made in germany. The seals on the filter looked a little different, but generally similar.
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1982 240 D, 308,000 - 321,127 miles (sold) 1982 300 TD,166,500 - 226,000 miles 1998 E 320, 120,000 - 144,000 miles 2005 C 230 K, 26,000 - 77,000 miles (sold) |
#2
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did you replace the rubber washers on the shaft (i think there is one) and the crush washer between the big bolt and the filter housing?
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-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#3
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I changed my filter thinking that I would not need to change the O-rins on the big 24mm filter bolt I was wrong and it leaked. I lucky I was able to find some that worked from a bunch of American size ones that I have. I learned that before I start the job have the O-rings in hand (or if yours has only 1 O-ring that 1 o-ring and the crush washer that goes under the head of the bolt).
After you filled the filter with ATF it is still a good idea to do some pumping with the hand primer (if there is one) to get rid of the air. If not it is best to run the car longer and make sure all the air is out. If a lot of air is in the system sometimes it is easier on the battery and sarter if you loosen some of the fuel injection lines up by the Injectors and crank the engine until fuel spurts out and retighten them.
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84 300D, 82 Volvo 244Gl Diesel |
#4
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diesel911,
i could not remember how many there were but i think there are two just like yours in your post.
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-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#5
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I used to crack injector lines, but now just crack the out-going banjo bolt on the main filter. Then prime till fuel flows. I don't even bother filling the filter anymore, this works so good.
If your seals are sealing, chances are you just still have air in there. Crack that center out-going banjo bolt, prime like crazy till you have solid fuel, and I bet she starts fine.
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Think Alternative Energy! 300CD '80 (now gone but not forgotten...) |
#6
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There was no rubber washer on the shaft. I reused the crush washer.
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1982 240 D, 308,000 - 321,127 miles (sold) 1982 300 TD,166,500 - 226,000 miles 1998 E 320, 120,000 - 144,000 miles 2005 C 230 K, 26,000 - 77,000 miles (sold) |
#7
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Quote:
I figure the leak is a separate issue from the no start. Am I wrong?
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1982 240 D, 308,000 - 321,127 miles (sold) 1982 300 TD,166,500 - 226,000 miles 1998 E 320, 120,000 - 144,000 miles 2005 C 230 K, 26,000 - 77,000 miles (sold) |
#8
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If the leak in the primer pump was bad enough I would think you could draw more air into the system.Did you put the two filter seals up to each other?Make sure the rubber seal on the old screw on filter matches the new one.Different brand filters can have slightly different diameter cans but as long as the ports match up and the seal on the bottom it should be good.When I changed my fuel filters last the big bolt on the top of the can leaked for a little while tightened it up and i was good to go.
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#9
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Quote:
Could be you have a poor pump. Probably needs tons of pumping, more than one would think necessary. Likely you still have air in the system; hopefully you are not still drawing it in somewhere. But imho you absolutely must crack an injector lone or that banjo bolt and pump till no more air remains.
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Think Alternative Energy! 300CD '80 (now gone but not forgotten...) |
#10
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I changed my fuel filters for the first time around Xmas time. Had the same issue with the bolt, temporarily fixed with some sealer, later did the job right.
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1985 500SL Euro w/ AMG bits 130k 1984 300SD Turbodiesel 192k 1980 240D Stick China 188k 2001 CLK55 AMG 101k 2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! |
#11
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Quote:
On the bolt there should be a machined slot for a rubber "O" ring to fit in, if you don't have one, find one. Replace the primer also, or at least replace the fuel lines going to it.
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83 SD 84 CD |
#12
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Quote:
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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt. |
#13
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Quote:
Regarding the primer, I pumped until fuel spilled out of it. Should I keep pumping? that seem's unnecessary to me...but what do I know. What are the spec's of the copper crush washer? And can I do/replace anything now that will allow me to never have to use a copper crush washer again? they're too hard to find.
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1982 240 D, 308,000 - 321,127 miles (sold) 1982 300 TD,166,500 - 226,000 miles 1998 E 320, 120,000 - 144,000 miles 2005 C 230 K, 26,000 - 77,000 miles (sold) |
#14
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Quote:
If air gets up into the Fuel injection lines between the IP and The Fuel Injectors it takes too much cranking with the engine to purge it. As I said if you loosen some of the Fuel Injectio Line nuts up by the Fuel Injectors ie bleed out fast. Check this PDF below to see the factory method of bleeding the air out after a filter change: http://www.pauldrayton.com/uploadfiles/merc/Service/W123/w123CD2/Program/Engine/617/07_1-140.pdf
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84 300D, 82 Volvo 244Gl Diesel |
#15
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Quote:
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1982 240 D, 308,000 - 321,127 miles (sold) 1982 300 TD,166,500 - 226,000 miles 1998 E 320, 120,000 - 144,000 miles 2005 C 230 K, 26,000 - 77,000 miles (sold) |
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