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#16
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K 90 Dodge D250 5.9 Cummins/5 speed. 400K Gone and still missed...1982 w123 300D, 1991 w124 300D |
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You sure make that sound easy. Which route do you use for adding the oil ? And , are you using the injector hole or the glow plug hole for your compression guage ?
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I wouldn't suggest doing this to a good engine but heres what I did after finding LOW compression on a TD I bought. (I couldn't get it started by towing.) I needed to get it started to make a determanition of how it "drove". I squerted a 50/50 mix of lub oil and ATF into the GP holes, enough to hydro lock the engine when turning by hand, waited a hour or so, engine not locked anymore. It fired right up long enough to drive around a couple a couple hours and check out the car. That was really a 'last ditch" effort.
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#19
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Your rings could be stuck too since your engine has probably sat for a long time. Try to free up the rings once you get it to where you are going! To do this you will need to have the engine running. Let it warm up to normal operating temperature and then slowly feed a stream, small stream of water into the main plenum of the intake manifold while holding the engine at about 2500 RPM. SLOWLY pour in about a quart and watch the steam coming out of your tailpipe. DO NOT stall the engine with too much water!! You could take your compression test first and then do what I said and let us know what happens! The moisture from hot water being compressed into the cylinders while the engine is running will help loosen the carbon that sometimes gets lodged into the rings and causes them to freeze to the pistons. Especially if the engine you installed has been sitting for a long time without starting. Keep us informed!
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#20
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Here is the critical physics question. Do you actually know how small the distace is from the side of the piston to the bore in these engines ? |
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#22
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that water deal is definetly an interesting though. The motor has not been sitting though, I pulled it from a running car and installed it over a year ago. since then I've put 20k miles on it with no problems. Last time I drove it was yesterday. I'm game to try this steam cleaning of the rings, but how do you suggest it get it in there what with the air filter and turbo in front of the intake manifold? honestly I think this thing is just wearing out, so I'll be carrying a can of wd-40 from no on!
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#23
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Where are you in nova scotia? What really bothers me is adding oil to the cylinders could only be useful for one start and run. How come you got so much time till your problem returned? Did the ambient temperatures really cool off over that time? What is the reason the problem is back? Since they were kind enough to charge you three hundred dollars at least you should have the compression values. If not get them. You cannot make any real decision in my opinion otherwise. Did they do a test to confirm the rings? Could as well just be tired valves otherwise. For example improving the ring seal might have given just a little more compression to overcome poor valves. Or still something else.
That engineer is not crazy. What might be crazy is my agreeing with a chrysler engineer perhaps. Forgive me I just could not hold it back. The water injection we used to use as a decarbonising agent on older gas oil burning engines we brought. If by any chance you decide to try it make sure the engine is warmed up to operating temperatures first. And meter the water in fairly slowly. On gas cars we flowed it in faster than I would with a diesel. I cannot personally express an opinion on the results with a diesel. Neither can I personally vouch for it with a diesel. We just were trying to decarbonize the general chambers and piston tops on gas engines. It never occured to me it might have some value with the rings. I do not remember the consumption rate of oil dropping but then again the effect did not reach the oil control rings probably. They also were less likely to be carbonized. It did work as the carbon blew out the exhaust I remember. That was a long time ago come to think of it. Think 39 fords 46-48 fords etc. I was not alone in this practice either. It took this mention to even remember it. A lot of those earlier engines burnt some oil and a percentage baked to carbon. In no case that I am aware of did the introduction of water do any harm. Last edited by barry123400; 01-18-2007 at 08:28 PM. |
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#25
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Far better to glow the plugs for 30 seconds, cycle the key, and glow it for another 30 seconds. Then, you'll get the resulst you are looking for. |
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#27
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Care to explain how that might work without voltage applied?
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#28
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First lets talk about chances...
It is about a 2,000,000 to one chance that it is carbon stuck rings causing this as compared to worn out rings. For the record, the WAY in which rings wear out is they lose their ability to expand to follow the difference in the diameter of the bore . It is metal fatigue from billions of strokes up and down that cylinder wall. Using steam to break up carbon buildup INSIDE the combustion chamber on a gas engine is very different from thinking you can reach the rings on a MB diesel engine..... on the other hand... if you put some liquid into the bore which would act as a solvent for the carbon .. then take it out of the engine before it was run ( ie, not contaminate the oil )... that might have a chance of working IF the carbon stuck rings are the problem. The idea of proposing to a lay person ( as compared to an automotive testing department) that they take a chance on putting water into the intake.... still crazy in my book. And warning them not to stall the engine... WHAT method do they have for knowing they are close to stalling it ? They are taking a chance on breaking a piston or bending a rod trying this on a system as closed and high in compression as a diesel engine. |
#29
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Care to explain why the MB FSM would say that if it were not true ?
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#30
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John
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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! |
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