Engine Cooling and Cabin Heating System Tutorial

[Tom K.]

Weighing in a few recent issues. '70 vert. I also have the large rectangular hole on the driver' side - it was a big help when replacing the main wiring harness last winter. It look sfactory. The passenger side has a small circular hole. Used both holes to spray fluid film in the areas for rust protection.

Regarding the y-pipes. Just last week I found them on the Samba classifieds. Two different sellers (for left and right) - about $20 for each. Flaps work on both, and both had the original insulation and straps. Found the bakelites too and the bellow tubes.

Samba has everything you need - good info and good used parts.
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'91 Vanagon Westfalia
'70 Beetle Convertible
'71 Super Beetle Semi-Automatic: https://www.thesamba.com/vw/forum/viewtopic.php?t=714131&highlight=
'65 Ghia: https://www.thesamba.com/vw/forum/viewtopic.php?t=762478&highlight=

[graph]

Thank you, great write up!

[AlmostHeavenWV_VW]

Corrected Jbugs heater system diagrams:

and one I cobbled together from Wolfsburg West's parts diagrams to show most of the system pieces/parts

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1973 Standard Beetle
1600DP AK case
Solex 34PICT3 Carb
Bosch DVDA 205AJ Distributor

[Paul Windisch]

Awesome, thank you!
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*ASE Recertified Master Automotive Tech*

1984 Mexican Beetle
-1914cc
-L3 Heads 35x32 valves 52cc chambers
-0.040" deck for about 9.1:1 Compression
-Engle W110 cam
-CB Super Stock 1.1:1 Rockers
-Stock Heat Exchangers w/ Tri-Mil Muffler
-Dual Weber IDF 40s w/ 26mm venturis
-034 SVDA Distributor

2013 Chevrolet Volt DD
2005 Pontiac Montana SV6

MAHLE Service Solutions
Applications Engineer

[Fair-cooled]

This is an excellent tutorial on all things related to Beetle heating, engine heating and cooling, and how it all works together. The most interesting part for me was learning which vents to close when windshield heat is paramount as well as how to monitor the condition of the thermostat.
I’m hauling my engine out this summer to change my transaxle, so I will
be checking everything on the engine, including the heating/ cooling system. I only wish there was a cylinder head temperature gauge that fastened to the cylinder head without using a spark plug to hold it in, because I sort of think that after several plug removals there is quite a chance of the heat transducer
on the wire end would break open. But it’s been a fantastic learning experience and with be serving me well soon!

Thank you for your efforts Paul.

Darren.
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‘74 Super beetle, originally from California until 5 years ago.

Seize the day...not the Engine...

[RWK]

I'm using one of these TC's in a bus project, they also sell bolt on and stem type TC's

http://thesensorconnection.com/category/cht-sensors/all-cht-sensors

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73 Type 181
63 Type 113
63 Type 261- 428 071
62 Type 241-378 025 178 530

[Fair-cooled]