original 72-74 dual carbs

[busdaddy]

[SGKent]

Raul - it has been a long time since I worked on factory dual carbs on a VW engine. The last time in fact was on a type 3 engine in the early 1980's I restored for my brother. While it ran like a Swiss watch when I was done, but even back then carb parts were hard to come by. I remember driving to Santa Monica VW to buy gaskets and fittings for the linkage. It also took a while to find a shop that could re-bush the carb throttle bases as they wear something terrible over time and leak air like a barn door. The fellow who bushed them for me was in Pomona, Montclair, or LaVerne comes to mind as I recall, your neck of the woods.

I can't speak from my own experience on a 1972 bus but a good friend had a new one back in 1972- 1974. He loved the bus but had many issues with getting it to run right while it was still under warranty. Others might give different advice, but if I lived in SoCal and wasn't building a museum piece, I might look at other carb options for that engine to where I could get new carbs that have a warranty on them. You can probably get that model carb you have running really well, however based on my experience with used carbs, you may need to collect a box of them to get all the parts you need. Do consider other options. You might talk with someone like Desertbusman as I believe he runs duals. His location in Phoenix gets hotter than you do but the climate is not all that different. As long as the carb you put on has chokes and a short manifold you can get by without preheat unless you plan to overnight in the Sierra's with it in winter. Try to get sealed air cleaners though as open ones are quite noisy and the power gain on a bus is not noticeable. Just my 2 cents worth. Others may feel this advice is not the best and that the originals are what you should get. Go with what you feel is the best advice.

Good luck.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[old DKP driver]

Back in the 70's & 80's the company to buy rebuild kits for Solex Carbs
was, www.royze.com and they had quality kits but, we prefered to use the
original needle & seats along with the washer as it became apparent the QC
was just not as good as Solex.

They are still in business and have been in Garden Grove,CA. for over 50 years.
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V.W.owner since 1967

[Amskeptic]

[busdaddy]

Yes, aircleaner preheat is a must but do test the valve to cofirm it works as advertised. Slightly worn bushings can be tuned around, but I've seen some with up to .020" or more play, that reaches the point where the CIS can't keep up.
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Rust NEVER sleeps and stock never goes out of style.

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[Vanapplebomb]

A little off topic I suppose, but figured this is a good place to post this.

I rebushed the throttle shafts a while back. Figured I would show some pictures. The stock bushings are pretty wimpy as you can see in the comparison photo. I removed the bronze bushings and the nylon(?) split inserts, then drilled out the ends with a 3/8in drill to a depth of 1/2in. The new bearings are iglide T500 bearings made by igus of Germany. They are a poly composit bearing with solid lubricants and fiber reinforcements. The fiber gives structure to the polymer to keep it from cold flowing. Solid lubricants do a good job of keeping friction and wear down from the throttle shaft pivoting. Dimensions are 5/16"id, 3/8"od, and 1/2"length. Throttle shafts were originally 8mm, which is slightly larger than 5/16". I sanded down the throttle shafts on the drill press until they were a nice fit in the new bearings. They should wear much much better than the factory bushings due to the fact that they are as tough as sintered bronze, have a much larger surface area, and galvanic corrosion won't eat away at the steel throttle shafts.

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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[Vanapplebomb]

Tech tip for those looking to replace their old, cracked, and leaking rubber 90deg elbow fittings on the central idle circuit intake pipe...

I found this to be an alternative to OEM replacement rubber elbows. It replaces both the elbows and the steel tube. Available off the shelf in most Autozone stores and sold as an emissions hose for 5.7 Chrysler HEMI engines. It just so happens to fit perfectly on 72-74 engines with factory dual carbs. With the bends in it and thicker wall, it isn't as likely to kink as simply running a length of fuel hose looped over between the air cleaner elbow and the carburetor. Hope someone finds this useful.

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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[airschooled]

Wow, it fits like a Volkswagen part! Nice job!!
_________________
Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com

[chachi]

thanks vanapplebomb, i'm going to try to find that.
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'74 transporter panel
'91 vanagon carat NAHT

[busdaddy]

Sweet!, looks like it was made for the job.
_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

Слава Україні!

[Vanapplebomb]

Pretty easy to find at any autozone. Most stores have it hanging on the racks near fuel line repair, emissions, and other vehicle hardware stuff. Just walk back and forth thru the isles, you will find it. Hard to miss with its unique shape. That is how I stumbled upon it in the first place. Hey, that's a funny shaped hose...hey, thats actually about the right shape and size for original dual carbs. Bought it on a whim knowing I could just bring it back if it didn't work, but it actually fit like an original part.

Probably available at many other auto parts houses as well.
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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[sparky892]

[Vanapplebomb]

Stopped at the bike shop and picked up a junk punctured inner tube from a snow/sand bike (fat tires). I cut it into a couple sections with a straight edge and razor to make air cleaner elbow seals. Original factory ones are old, hardened with age, and have lost all elasticity. No stretch, no seal. These inner tube sections fit nice and tight like they would have originally been from the factory. Trick is to stretch them over the elbows, roll the ends back, slip the elbows on, then unroll the seals over the slip joint.

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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[rugblaster]

I have a factory tool kit to make the throttle shaft repair. I would have to find it, haven't seen it in years, but it has to be in my garage....I think it was Hazet....they may still have some available.
_________________
'69 Karmy, '69 Camper, Meyers clone, '65 drag bug, 10.78 @ 128 (sold it) '51 Dodge farm truck,
'09 MB E350 '18 MB E400, '65 Plymouth Valiant convertible and a '19 Ford F250 King Ranch (nicer, but dirty, farm truck)

VWoA factory trained line tech 75 till 90 or so
ASE Master Certification
VWoA Assoc. of Quality Technicians inductee (One of 25 in the five state southwest region)
La Confrerie des Chevaliers du Tastevin (San Angelo Chapter)
TCU ......GO FROGS!!!!!!

[chachi]

finally made it out to the 'zone...as described:
https://www.thesamba.com/vw/gallery/pix/1498471.jpg
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'74 transporter panel
'91 vanagon carat NAHT

[chachi]

finally made it out to the 'zone...as described:

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'74 transporter panel
'91 vanagon carat NAHT

[Vanapplebomb]

Nice. Slide the long end over the carbs intake and the short end over the nipple in the air cleaner elbow.
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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[Vanapplebomb]

I find that often the fresh air hose spring steel clip is cracked off on these old filters. See the white arrow in the first picture from the service manual. I ended up slightly modifying a spare air cleaner clip. I had to trim about half an inch off the bottom and slightly tweak the clip into a slightly different shape. Once I had the clip Loking the way I wanted I drilled a hole through the clip and air cleaner housing, then fixed it in place with a steel pop rivet.

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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[pittwagen]

This is a question for Vanapplebomb. How are the Igus T500 bearings performing as throttle shaft bushings? It appears we can order the 8mm x 10mm x 10mm directly from Igus. So should be a direct fit. Thanks.

[P24p1]

Just to piggyback off this thread, I'm guessing then that there isn't a real problem if you put '72 carbs on a '73 engine? Besides maybe lack of the EGR system? Which I was gonna delete anyway

Will the air filter from a '73 fit on the carbs of a '72?
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1973 Westfalia named Angie

What rust?

Rev it - don't lug it!