I am on route I-70 between Indianapolis and St.Louis having a problem with one injector...Could any one recommend a good Diesel shop along the way...The car has a knocking sound at idol (the injector is weeping) At high speeds the car is OK....Thank you........Peter....

If its weeping at the return line try cutting 1/2" off and reattaching. Doubt that is the inj knock issue but could help.

Your not running svo/wvo are you? If so get that inj out of there and then go back to D2, quick.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Knocking or nailing?

Meanwhile any interstate truck stop has skilled diesel techs for 24/7 emergency repair. Never forget your 300D shares engines with Freightliner Sprinters, and tell em this if tough-guy behind the counter breaks down and cries like a baby over working on Mercedes.

Dieselnut,

Loosen one flare nut at a time on the top of each injector. If the noise stops, that's the injector that is bad. Then switch the suspected bad injector to another cylinder. Restart engine and loosen the flare nuts again, one at a time.


If the noise moves with the injector, the injector is bad. Replace the injector.

P E H

Hello everyone,
I am now in Roswell NM. Back the other day during my first leg of the trip, I pulled into a rest area when I noticed the rpm dropped to near 500rpm with ac on and a not so loud rap aand engine felt not running on all 5.
well I took alook and found one injector welled up between the threads on the body and felt that was the problem. I took it out when cold the next am and gave it aliitle more torqeand re installed.
it still gets welled up but does not drip.
The engine does run ok but with a slight combustion knock, so I call Brian Carlton for advise for a indy in tulsa ok. He gave me the address to a Mr. Buessy and I found him. He felt it was problem with #5 and sent me to Thompson diesel near down town Tulsa. I took all 5 inj out in the parking lot to have them tested. Well the were all ok with good spray pattern. The balance I thought was a bit of a spread but they did not think so, lowest was 136 bar high was 142. I did install new seal washers and was on my way. the engine sounds a little better but on ocassion at idle it does sound a little different and a slight knock. I now feel that some of my problems stem from a lean setting at idle since I have been trying to get the cyl balance set but i now relize that I should start with inj. set as close as possible before trying inj balance.
Thank you Brian for your help, I will give you a call in the near future,I will post more info when I can get to a computer when I get near Denver

Thanks
Peter

Interesting issue, Peter.

The difference between pop pressures is not significant. I'm wondering if the timing on one of the cylinders is off slightly, since you were making some adjustments along the way.

It remains a curiosity of what changed during the trip to cause the issue..........once the injectors are eliminated.

You didn't happen to peer down into the prechamber on #5 to confirm that the shaft and ball are still incact..........??

Brian,
yes I did check all the pre-chambers and touched with a tip of a screwdriver all the balls to make sure everything was tight, and all pre chamber balls were tight.. I did however before I left Roswell, checked the mill volts of all the cylinders and brought up #3 and so far I have not have heard that slight knock at idle. Thanks for the reply Brian,

Oh, bye the way, has anyone heard of getting hot fuel at the pump, When in Roswell I filled up for the drive north at a conaco and when I was pumping the fuel I could feel that the nozzel was warm to the touch, I did have a thermometer with me and the fuel measured about 75 degs. I have read about this before thru a friends trucking magazine, and it appears this is a topic of concern for all of us diesel owners, fuel is to be served at 60 degF, any warmer and the consumer is getting ripped off and the big boys continue to get fatter. Also your milage will go down because you are not getting the btu you need, the 60 deg. fuel is supposed to expand in your tank, not the wallets of the oil co's, any thoughts, I would like to persue the topic of hot fuel.

Thanks
Peter

Some oil companies here are known to get oil up to about 150 degrees and deliver it hot. They deliver a gallon of fuel at 150 degrees, and, after it cools down a bit, the result is slightly less than one gallon.

I never figured out how they managed to pay for the heat required to raise the temperature of the fuel.......it will more than offset the savings generated by ripping off the customer.

Dieselnut

Always buy fuel in the morning. It cools off overnight and U get more molecules and BTU per gallon.

The fuel companies are not heating the fuel. It gets warm from the hot NM sun. Same goes for water. Its comes out of the faucet cool from being in the building, then continues to get warmer when it comes from the outside. I was in AZ one time and never used any water from the hot tap to take a shower.

P E H

either the tank is VERY close to the surface, or they have pluming to the fuel tanks exposed to the sun... I fail to see how having the lines exposed could keep the fuel warm, but I suppose it's possible. perhaps the first few gallons of fuel would be hot, but the rest would be ground temp. that leaves an above ground tank, or a well insulated tank with very close surface exposure.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

i have to ask, what is ment by the adjustment of #3 cylinder mill volt?
a very confused person
larry perkins lou ky

Hello,
the adjustment I am refering to is the delivery valve. If you search milli volt or balance,cylinder balance or check Barrys post, I cant remember his last initial, you will find a ton of info on the subject. all you are doing is with the use of a dvom you check the voltage at the glow plug terminals with engine running and warmed up and glow plug wire harness unpluged from controller.
The now not energized glow plugs generate voltage consistant with the heat in the cylinders.

Oh yea, warm fuel, I also got it near St. Louis in '05 at a flying J on rt.55 and it to was about 75 degs. and the temps were in the 60's.
I recently read about it again in a different publication and it is still a concern for the truckers when the really worry about the bottom line.

Im going to google hot fuel and see what coms up.


Peter
1984 300d 274k

thanks, i do understand how the voltage is generated,what i was asking is how in the world would one balance (i assumed that you made some adjustment ) the cylinder?
larry perkins lou ky