Recently I've been looked at a couple of 603 engines that have the EGR deleted. Does this pose problems for those who live in states who do an emission inspection on such cars? In RI, they do an opacity test.

Thanks.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Diesels should be exempt as far as that goes... leave it intact just put a BB in the vac line

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

In RI they definitely measure the density of diesel exhaust.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

The EGR has nothing to do with opacity measurements. Effectively they're not testing it, though I'm sure some places do a visual "is the stuff intact" check.

RI is still doing opacity on a 25 year old car. Even MA doesn't do that anymore.

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1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss

Actually....I think you're right. I just read that they do the test BUT you don't fail if you don't meet emission standards. So I'm all set.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

In middle TN they do the opacity test too if you live in or any county surrounding Nashville and your car is newer than a '74 , i had my SD go through emissions about 3 months ago; it registered a .03% with 10% being the limit. i'm thinking since California doesn't even require diesel emissions testing that it's just a way for them to make some money.

In California on Gasoline Cars part of the Emissions check is visual. The Tech has to say yes or no to items that are supposed to be on the Car and enters them in the Computer.

So if they ever decided to pay attantion the Diesels there is going to be a visual check to see if an EGR is connected or not.
They also used to disconnect the EGR Vacuum Hose and hook up something like Mighty Vac to see if the EGR worked or not.

Also out here they test you Fuel Cap.

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84 300D, 82 Volvo 244Gl Diesel

1998 and later diesels are now smogged in California. Earlier diesels are still exempt and are not inspected at all. For those living in places where older diesels must be smogged, it's probably best to leave the EGR valve and its plumbing on the engine and use a removeable defeat. The two easiest defeats are first, a BB in the vacuum line to the EGR valve. When the car goes to be smogged, remove the BB. Second, for later models where there's an electrical connection in the EGR valve, lack of vacuum causes an error in the EGR electronics. For these engines, a home-made solid gasket can be fabricated from sheet metal to replace the factory gasket between the EGR valve and the intake manifold. Now the EGR valve can open or close all it wants but the gasket prevents exhaust from getting sucked into your intake manifold. For smog testing just put the factory gasket back.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

You'll probably pass an exhaust opacity test. You'll probably fail an underhood inspection.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.