Bluesmoke

[Jawwry the man]

Greetings,
A friend of mine has a 92 P.U.-6.5 w/182k. He bought it with 82,000 on it. He has never taken the engine apart. The other day, not pulling a load or up a hill, the engine started shaking and blowing blue smoke. It idles very rough, even though he has always changed the oil regularly. He took it down to a local shop they said two dead cylinders, most likely cracked rings and tried to sell him new engine. I told him, "Try to confirm what's wrong, are the cylinders next to each other, etc are there any bubbles in coolent? etc."
If you have any other ideas please help.

[Robert Shupe]

You may have a couple of dead injectors, If they have not been replaced you might be ready for a new set

[cruzer]

Does it have blowby? Oil smoke out of the dipstick or oil fill? If it does then maybe rings or cracked pistons.

[number two]

Time for a compression test on all eight cylinders,giving you a chance to look at the condition of the glow plugs. My '93 recently drove me wacky with a similar problem-would have found it quicker if I'd adhered to proper testing procedures. Check all the holes. Had I looked at all the glow plugs,I'd have seen the wet one and went right to the offending cylinder. Oh,mine broke a rocker arm retainer allowing the rocker arm to slip off the pushrod,killing that cylinder.Sure did run rough and smoked some too.