Vacuum delay valve - hard to find!? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C10wip · 12-20-2013, 01:18 AM

I had read that the vacuum delay valves sometimes get clogged over time, and that replacing them wasn't a bad idea. Looks like a cheap plastic part so I thought I'd do that. But... these things seem to be hard to get a hold of.
The part numbers I found were BWD EC312, Standard DSV20, Echlin CRB 2926, and AC Delco 214-580. None of the chain auto parts stores stock them and NAPA couldn't even order their version. RockAuto has them in their listings, but when I ordered from they called back and cancelled the order a day later, same deal with mypartsgarage . So, I found one on eBay and ordered it; we'll see if he really has it.
So my question is - why is it that no one stocks these? It doesn't look like they have been superseded; is it that they never fail so no one buys them?

INSIDIOUS '86 · 12-20-2013, 05:43 AM

Are you talking about the vacuum switch on the firewall for the lockup converter?

C10wip · 12-20-2013, 09:55 AM

This valve is the delay valve for the distributor vacuum advance. On my 250-L6 it is located up by the thermostat housing.

INSIDIOUS '86 · 12-20-2013, 01:07 PM

Quote:

Originally Posted by C10wip

This valve is the delay valve for the distributor vacuum advance. On my 250-L6 it is located up by the thermostat housing.

Sounds like a silly emissions device to me. Plug that sucker in to full manifold vacuum.

12-20-2013, 01:18 AM	#1
C10wip Registered User Join Date: Nov 2013 Location: College Station, TX Posts: 72	Vacuum delay valve - hard to find!? I had read that the vacuum delay valves sometimes get clogged over time, and that replacing them wasn't a bad idea. Looks like a cheap plastic part so I thought I'd do that. But... these things seem to be hard to get a hold of. The part numbers I found were BWD EC312, Standard DSV20, Echlin CRB 2926, and AC Delco 214-580. None of the chain auto parts stores stock them and NAPA couldn't even order their version. RockAuto has them in their listings, but when I ordered from they called back and cancelled the order a day later, same deal with mypartsgarage . So, I found one on eBay and ordered it; we'll see if he really has it. So my question is - why is it that no one stocks these? It doesn't look like they have been superseded; is it that they never fail so no one buys them? __________________ 1980 C10 Custom Deluxe, 250 L6, 3 in the tree.

12-20-2013, 05:43 AM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Vacuum delay valve - hard to find!? Are you talking about the vacuum switch on the firewall for the lockup converter? __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

12-20-2013, 09:55 AM	#3
C10wip Registered User Join Date: Nov 2013 Location: College Station, TX Posts: 72	Re: Vacuum delay valve - hard to find!? This valve is the delay valve for the distributor vacuum advance. On my 250-L6 it is located up by the thermostat housing. __________________ 1980 C10 Custom Deluxe, 250 L6, 3 in the tree.

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