[cruiser_guy]

Originally Posted by JuanGrande

It appears that all light-duty diesels will be required to be smog tested, but no one has been able to definitively give me an answer about older vehicles. The one point that I have kept coming back to is that diesels in CA are not smog-exempt, they simply are exempt until 2011 from being tested - big difference. I was so close to pulling the trigger on the 1HZ motor, but that would have been a very expensive gamble.

In Vancouver, British Columbia and area they have been smog testing light duty diesels like the 3B for at least 10 years. I have NEVER even been close to failing with my Toyota diesels (3B both naturally aspirated and turbo'd as well as a naturally aspirated "L" engine).

The test criteria is less than 30% opacity, whatever that means exactly I'm not sure, and I am generally below 5% and often at 0% on regular diesel fuel.

I have had an '84 BJ60 that was in need of a rebuild that had so much blowby that occasionally folks would ask if it was on fire!! If the blowby was low enough or not visible so that I was allowed into the building to be checked, it too passed easily!

Personally, I wouldn't worry too much about smog testing on the diesels unless you've messed around with fuel delivery or injection timing. In the end, if you meet the emissions standards as they applied on the date of manufacture you should be OK.