A week plus ago I noticed my 2002 4x4 was running rough. As if one cylinder was missing under load. I was keen to get the last ferry 'home' to Bruny Island so continued on.
Didn't make it to the ferry before a cloud of smoke came up from the bonnet/hood. The lube oil filler cap had come off and the resulting oil spray immediately combusted when it hit the exhaust. A good fire extinguisher cured the fire, and next morning the cap was found and a litre or two of oil replaced. No obvious damage so the engine was run. Definitely missing. Is the oil filler cap designed to blow out if the engine is over pressured??? The cap showed now sign of damage. My wife found it in the engine bay.
The vehicle was towed to an obliging general repair shop next morning. The shop removed the recently replaced injectors and determined no. 5 cylinder was 'washed' with unburned fuel. Shop cannot work on it further for another week or so but spoke with M-B folks who tell them a problem with no. 5 cylinder is not uncommon. I'm not sure what the purported problems are. A cracked head also is not uncommon they say, but the shop feels the head is okay. When they get shop space they will start dismantling to look for the fault.
My question is has anyone had a problem with no. 5 cylinder? I don't know what might be different or special about one particular cylinder. (Except it might be more difficult to access in situ! )
Any thoughts or theories will be appreciated!
Bob M, long and tall dead in New England
MWB 4x4 low roof misbehaving in Tasmania
Didn't make it to the ferry before a cloud of smoke came up from the bonnet/hood. The lube oil filler cap had come off and the resulting oil spray immediately combusted when it hit the exhaust. A good fire extinguisher cured the fire, and next morning the cap was found and a litre or two of oil replaced. No obvious damage so the engine was run. Definitely missing. Is the oil filler cap designed to blow out if the engine is over pressured??? The cap showed now sign of damage. My wife found it in the engine bay.
The vehicle was towed to an obliging general repair shop next morning. The shop removed the recently replaced injectors and determined no. 5 cylinder was 'washed' with unburned fuel. Shop cannot work on it further for another week or so but spoke with M-B folks who tell them a problem with no. 5 cylinder is not uncommon. I'm not sure what the purported problems are. A cracked head also is not uncommon they say, but the shop feels the head is okay. When they get shop space they will start dismantling to look for the fault.
My question is has anyone had a problem with no. 5 cylinder? I don't know what might be different or special about one particular cylinder. (Except it might be more difficult to access in situ! )
Any thoughts or theories will be appreciated!
Bob M, long and tall dead in New England
MWB 4x4 low roof misbehaving in Tasmania