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#1
08-25-2003, 11:28 AM
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Any idea where I can get a thermal vacuum switch for a 1969 Pontiac GTO. I ordered 1 through NAPA but it may not fit the plug I have. Is it ok to do away with the plug and just run the vacuum lines right to the switch. There are 3 lines and it doesn't look like it would make a difference what outlet they go to. New to this board. Thanks.
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#2
08-25-2003, 11:28 AM
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Any idea where I can get a thermal vacuum switch for a 1969 Pontiac GTO. I ordered 1 through NAPA but it may not fit the plug I have. Is it ok to do away with the plug and just run the vacuum lines right to the switch. There are 3 lines and it doesn't look like it would make a difference what outlet they go to. New to this board. Thanks.
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#3
08-25-2003, 11:50 AM
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you'll need to get the right hose to the right terminal on the switch.
the ports either open or close as the coolant temp increases. mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
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#4
08-25-2003, 12:25 PM
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Hi,
I believe that a 69 GTO uses the same set-up as on a 68 GTO. Look at the picture below. You can buy the switch from PY, Year One and Ames to name a few suppliers. It mounts on the right front of the intake manifold in the forward water passage. There is a GM Service Bulletin regarding the use of a distrubutor vacuum control valve for automatic vs manual transmission cars. Basically, the auto trans cars don't use the DVCV because it causes a clunking problem. I have been looking for a DVCV for over a year without success. The part is discontinued. I am running my Manual Trans car hooked up like an automatic trans car. Works fine. Mike 1968 Pontiac GTO 400CID, 350HP, 4-Speed Manual, 3.55 rear. Aquamarine Blue exterior, 219 Blue interior. Chrome bumper, AM & 8-Track
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1968 Pontiac GTO 462CID, 4-Speed Manual, 3.55 rear. Aleutian Blue exterior, 219 Teal Blue interior. Chrome bumper, AM & 8-Track and Rally II Wheels |
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#5
08-25-2003, 01:18 PM
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I have a manual trans, but I think it was originally an auto. I may try the part from NAPA as long as it fits into the manifold and hook the vacuum lines back up without the plug that is on the car now. Year one, etc have the part for around $50 but it takes a few days to get and I don't want to wait.
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#6
08-25-2003, 01:45 PM
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how many ports does the switch have & what temp does it open at? i had good luck w/autozone, they have a web site in the net.
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#7
08-25-2003, 08:07 PM
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May also be called a ported vacuum switch. If this works it may give you a lead.
ported vacuum switch Dan The DotRod rides again. 
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He's not the sharpest tool in the shed but he is a real tool. 
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