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Getbak · 12-02-2014, 09:50 PM

I have been told the detroit 466 is not good for long distances nor very few in country coach. I have an 98 40' magna. Blowing some smoke out spout under motor. Has 92000 and been serviced well. Any info appreciated. CC is now charging for tech support

Gary RVRoamer · 12-03-2014, 07:35 AM

Not sure which engine you are referring to, but a '98 with a Detroit Diesel engine should have the Series 50 or Series 60. 466 cubic inches is a 7.5L engine - is that what you have? The 50 is a 4 cylinder, so doesn't seem likely in a Magna.

Getbak · 12-03-2014, 10:48 PM

Gary I was told by CC today it is a Detroit 40 series. Thinki have a piston/ring problem. Knew I should have waited on a Cummins but I love my Cc. Was told it is 466
Ty

Getbak · 12-03-2014, 10:49 PM

Think they said 330hp

Gary RVRoamer · 12-04-2014, 08:23 AM

There is a Detroit 40 series that has a 7.6L (466 cu in) model. I didn't know it came in 330 hp - that is usually the bigger 8.7L model) - or that CC used it, but I guess that's it. Sorry, I don't know anything about the track record of that engine.

The "spout under the motor" sounds like an oil breather pipe, sometimes called a slobber tube because it drips oil. Noticeable blue/gray smoke there suggests that gasses are blowing by the piston rings and into the crankcase. However, white "smoke" is moisture and may merely indicate a lot of water condensation in the crankcase. If it's white, my first thought would be to change oil & filter and see if the problem persists. Another thought is to have an oil analysis done (take the sample before changing the oil) to check for the type of contaminants in the oil. That will give good clues about what it is and where it comes from. Blackstone labs can do an oil analysis, and some truck oil change shops (e.g. Speedco) can do it for you.