Unhappy SD-33T - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-28-2000, 12:07 AM
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Unhappy SD-33T

God, I was hoping I'd never have to post this...but I'm getting to a point where I'm seriously considering condemning my truck. Anyone whos' been on the Diesel Chat probably knows about this, but I'm having serious blowby problems on my SD-33T. I'm getting white sweet-smelling smoke coming out the road tube and through anywhere it can get out of the crankcase (including, I was scared to see, a crack by the rear bolt hole in the valve cover). The smell reminds me of what I've heard burning antifreeze smells like, although, as far as I can tell, my coolant level hasn't diminished any. Neither has my oil level (any more than normal; I've always been plagued by an oil leak). As far as I can tell, the power level hasn't changed, although I don't have another SD-33T to compare that to. The exhaust gas temperature has always seemed abnormally high (on the freeway, it consistently gets up to 900 or so degrees), but the coolant temp gauge has always read normal. But the smoke is so bad that I almsot got a ticket for it a few days ago, and did get kicked out of a theatre parking lot. I had a similar thing happen to me (minus the smell) before on a Volkswagen Bug, and it turned out to be a blown piston. So, I'm not very hopeful. I love my truck, but the body's in such poor condition that it really isn't worth pouring a whole lot of money into any part of the truck (including, sad to say, the engine). Note that the smoke seems to be kinda puffing out of the road tube, and I recently noticed an actual puffing sound at idle on start up (almost like escaping air, although I haven't noticed any cracks in the block or head) that goes away when the truck's warm. Also, even for a cold diesel, it seems to idle extra rough on start-up.
That's all I can think of on the way of clues...I don't have the tools to do any serious diagnostic work (i.e. compression checks) and don't really have the money to have a shop do anything (unless absolutely necessary). Any ideas? I'm preparing for the worst...if I wind up leaving the community, all I can say is, to quote Douglas MacArthur, I shall return.

The Warden

1980 International-Harvester Scout II SD-33T
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