A plastic piece broke off my thermo-valve and I bypassed it for now

Seems like all the thermo-valve does is make the EGR wait to function until the engine is up to temp

Is there any negative effects from bypassing it?
Like, should I even worry about replacing it?

What car?

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83 SD

84 CD

If it's a W123 with the 617, don't worry about it-I ran mine for a long time (off road of course) with no EGR.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Sorry, 1980 300TD

You can safely blockoff any and all lines associated with the EGR (for offroad us eof course )

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Is this your legal disclaimer? lol

If the thermo-valve is bypassed, wouldn't the EGR be running all the time?

We still don't know what car you're inquiring about.

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83 SD

84 CD

On my OM617 engine (300CD) the thermo-vacuum valve is replaced by a brass pipe plug.

I also installed an EGR Delete Kit that removed the EGR valve, blocked off intake and exhaust with custom-made plates and gaskets and removed all associated vacuum lines. I think the cost of the kit was about $15.

The car runs smoother and cleaner now with less soot buildup.

Sorry, it's a 1980 300td

The EGR would operate normally, except that its operation would not be inhibited when the engine was cold. It would not "run" "all the time" unless the 3/2 valves were bypassed and vacuum was applied to the valve continuously.

where does one find the EGR delete kit? Ebay?

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Kevin

1971 300SEL 3.5
1972 280SE 4.5
1968 280S Parts Car
1983 300D (5-spd conversion almost completed!)
1986 Toyota pickup 22R 4-spd
1968 Mustang 302 (soon to be 5-spd)
1981 Euro-spec 300d 4-spd parts car

Sold:
1987 300D (had 415,000 miles when I sold it, now has 462,000 and still driven every day!! Original head)