Was on a 700 mile trip and 450 miles into the trip I got a bad tapping sound from top of motor, big loss of power, and smoke out the back. I chose to go on as I was about 200 miles away from destination. What are some thoughts as to what is wrong and how to fix? Since I am not at home have limited tools. My thought im hoping is that a valve loosened up out of adjustment. A friend of mine thinks a broken valve spring or burnt valve. Any one close to the Allentown PA. area that could help me get this sorted out of do you think I could try to make it 700 miles home to In. I have to get back there by Mon.

It should not be too much trouble to remove the valve cover and take a look.

Also look for cracked camshaft bearing tower or camshaft.

Line up the timing mark on the back of the Camshaft Gear with the front bearing tower mark and look down and see how close it is to OT on the Crank Damper.

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84 300D, 82 Volvo 244Gl Diesel

Thanks diesel I will take a look tomorrow and get back.

Agreed. Pull valve cover and have a look.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Do your power window work and the engine shut off properly? Thinking vac pump...

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Hey Tom, power windows are electric

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Tell us what you see, Yuke. I does not sound good. Hope for the best. Sounds to me like the valve and a piston had a face to face meeting.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Locks. thanks Jim !

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I agree. A tapping sound usually doesn't indicate a serious engine problem and likely in the upper valve train, which can be fixed fairly easy w/ engine in car. Worst-case would be a broken aluminum post. Those unbolt easy, but you would need a junkyard replacement. Also, first rotate the engine until the camshaft mark is on the alignment mark so you put everything back clocked the same way. I rotate the engine using the bolt on the power steering pulley.

A broken valve spring can also be replaced w/ engine in car, but be careful not to let the valve drop down into the cylinder or you'll have big problems. Rotate until you know the piston is at the top to prevent that and hold the valve stem w/ a strong magnet when you first verify that.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

That is specifically WARNED AGAINST in the FSM because that is a tapered fitting...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

...it works though.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

Ok this is what I found out today. Went to Wally world and picked up 2 (14)mm wrenches grinded, heater, bent them to what i need all the valve clearances were off except 1 but all had some clearance telling me All valves were closing. I adjusted them shooting for .004 intake .012 exhaust or 10-35mm. When I started her up still had same sharp tap I guess like an injector nailing. When I loosened injector nuts 1 at a time I narrowed it down to 4th injector back. I guess rookie I will look for a used injector and see what happens. Before this happened I had all the injectors out they were popping at 1650 I shimmed them to pop at 1950. Maybe I goofed that one up could that cause the noise I am describing like nailing? Maybe I could take a video and post it tomorrow while I try to hunt down another injector. Keep the ideas coming I have to get this fixed by Mon to drive back home.

Swap it with another one on your car you will have the answer.

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92 e300d2.5t
01 e320
05 cdi
85 chev c10

Yes I thought of switching one with #5 one but I still might need another one if I cannot see anything wrong with mine. I do know I added a (2)mm extra shim in that one too get it to pop at 1950 psi. Thanks for the ideas will get back with my findings tomorrow oh is it miserly hot here in eastern PA.

Nailing can also be from a compression problem, which is annoying since it can be hard to tell what the cause is. Hopefully swapping the injector will give you a definite answer.

If you take the injector(s) out, definitely have a good look at the prechamber(s) and make sure everything is still solid in there.

-Rog