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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2010 Posts: 255 'Bolter | | 'Bolter Joined: Aug 2010 Posts: 255 | My 38 has dual wipers - but only driver side has a motor. The passenger side is apparently just for looks! I am assuming the extra wiper is not "factory". Is there enough vacuum on a stock 216 to operate 2 wipers? | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the 2nd might have had the motor removed sometime - there were also setups back in the day with a connecting bar externally so one wiper arm made the 2nd move in tandem .... I had 2 motors on a 46 GMC with a 228 that worked reasonably, but vacuum wipers aren't the greatest under any circumstances and when running 2 it doesn't take much push on the gas to stop them dead  Bill | | | | | Joined: Jul 2006 Posts: 190 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2006 Posts: 190 | I had a 49 ford with a V8 flat head and one wiper, anytime you let off the gas you were running blind. I am sticking with one wiper on the 37 since I will be running vacuum. If I am reading the master parts book correctly the dual wiper used one motor with links to two rods to each side transmission, it shows 35 to 54 2nd design. But the motors part numbers changed almost every year except between 37-38,42-48 and 49-52. No expert only going by the book. | | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | If you plan on driving in the rain you might consider replacing the vacuum with electric. Having an original Bolt is great but I would certainly upgrade where safety is concerned. That would include brakes, lights, and windshield wipers.
~Jim
| | | | | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | Be sure and use rain-x. if you can get it above 45mpg  you don't need wipers most of the time.
Last edited by WE b OLD; 02/19/2011 1:57 PM.
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
| | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Have posted this before but once again: vacuum wipers have an advantage over electric IF DONE RIGHT. First, go to your local pick-a-part and get the electric vacuum pump from a Mercedes diesel for 10 bucks or less (it's behind the spare tire). This can be mounted anywhere in the truck so even the best show judge doesn't know it exists if you use a little ingenuity. Where your friends truck may have a 2 or even 3 speed electric wiper you will have one with 100+ and it will work uphill pulling a loaded trailer and with the foot feed on the floor. You don't need intermittant wipers since you can adjust the speed to provide one sweep at any time interval you desire.
Evan
| | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | You sneeaky rascal you!
~Jim
| | | | | Joined: Dec 2005 Posts: 547 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 547 | That is awesome Coilover! What junkyard around these parts do you like to go too? The ones south of me that I have been too are usually pretty crappy.
58' 3200 235 3-speed/OD
| | | | | Joined: Jan 2002 Posts: 237 Shop Shark | | Shop Shark Joined: Jan 2002 Posts: 237 | To get a better vacuum system get a combination fuel and vacuum pump to cure the "slow down" issue. | | |
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