10-21-2020, 05:32 PM | #1 |
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vacuum source
Newbie to early V8's. Where and what is the source for the wiper vacuum. I have a loose line with a brass fitting floating around the fuel pump.
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10-21-2020, 05:38 PM | #2 |
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Re: vacuum source
What year flathead? Post a picture of what you have if you can....
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10-21-2020, 05:55 PM | #3 |
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Re: vacuum source
You don't say what year, but the vacuum source on my '46 comes from a port located just below the carb on the back side of where the carb bolts on. The steel line goes to the distributor advance plunger and the rubber hose goes to the wipers.
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10-21-2020, 06:04 PM | #4 |
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Re: vacuum source
Forgot to attach this picture of the vacuum source. The silver colored part with the hex goes through the banjo fitting with a copper washer on each side of the banjo.
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10-21-2020, 06:48 PM | #5 |
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Re: vacuum source
The banjo line goes to the distributor.
Actually to the port in the front cover. The hose is for vacuum wipers. |
10-21-2020, 07:05 PM | #6 |
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Re: vacuum source
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10-21-2020, 09:15 PM | #7 |
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Re: vacuum source
As far as I know, it’s just a fitting. When I had it apart,I could see through it, so unless a previous owner did something to it,it’s just a fitting to make the connection.
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10-22-2020, 11:07 AM | #8 |
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Re: vacuum source
Sorry I didn't put year. It is a stock 35 V 8
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10-22-2020, 12:48 PM | #9 |
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Re: vacuum source
Dave, If your engine is stock as you say, the fitting will screw into the aft driver side intake manifold. It will be a threaded hole near the manifold's mounting bolts, similar to another vacuum hole on the same line forward, which should be connected to the distributor for the vacuum break. The previous answers given you would be correct for a later engine.
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10-22-2020, 12:54 PM | #10 |
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Re: vacuum source
Not real easy to see in this photo of the top, but if you look at the bottom of the manifold you can see the channels that connect two adjacent ports for the vacuum source.
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10-22-2020, 02:28 PM | #11 |
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Re: vacuum source
.
You are looking at the driver side of this intake manifold. There are TWO sets of DOUBLE holes. Find the set of 'double' holes toward the rear (right side of picture). The BOTTOM, threaded hole in that pair of holes is the vacuum source for your wipers. There is also a similar DOUBLE pair of holes toward the front (left in picture). The bottom, threaded hole in that pair is source for distributor vacuum. Same as JSeery picture above, but a little larger...easier to see! DD |
10-22-2020, 04:21 PM | #12 |
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Re: vacuum source
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10-22-2020, 05:04 PM | #13 |
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Re: vacuum source
Seems like that's what I've read, also. DD
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10-23-2020, 07:18 PM | #14 |
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Re: vacuum source
Thanks Guys. Seems like someone put a bolt in the rear vacuum hole. I check in the morning.
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10-23-2020, 07:20 PM | #15 |
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Re: vacuum source
Got the car started and running pretty well. Just bought it in July and had been sitting for 10 years. Sounds great!
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