Blocking Air from Engine to heating system

[SoFloScott]

Hi all,

I was advised by a VW enthusiast here to block the ports which feed air from the engine through the heating system. I've seen a few posts on the subject here and think this is ok but wanted to double check just so I don't damage my engine.

So I have nothing under the engine for the heating system' no jtube
s, heat exchanges...nothing. Am I ok to block these ports with the understanding it will increase the cooling action on the engine? I live in Florida so cooling is a big deal!

Also, given there is no heating system, should I block the holes int he bottom of the tinware that allows for those connections?

Thanks,

Scott

[Glenn]

You certainly don't want to leave them open.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[SoFloScott]

All sets? The holes in the bottom of the tin AND the holes from the engine pushign the air through?

Is there anything specific I should use to block them? Ie blanking plates that fit?

[Glenn]

Anything from duct tape to welding patches over them.

Old style baby food jar lids fit great on the fan shroud. Hardware stores sell or sizes of rubber and metal plugs.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[KTPhil]

Step 1: Drink beer.
Step 2: Cut apart beer can.
Step 3: Clamp can ends to shroud.
Step 4: Rivet flattened can sides to rear tin.
Step 5: Have another beer to celebrate job well done.

[SoFloScott]

Thanks guys.

I'm not usually very handy but I think I can get behind this project! Off to the beer store...

[mandraks]

while i am all for the beer drinking route, you could also buy a new fanshroud without those holes. Or don't and invest the money you just save in beer.
_________________
regards

Uli

----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel

[Glenn]

[69aircooled]

Excellent example of a proper hot rod layout you got there Glenn!

[Trevor P]

You can buy brand new properly built shrouds without the ducts but definitely more costly than blocking off your existing ports. Options these days are better then they've ever been.
https://store.concept1.ca/Fan-Shroud-W-OHeat-W-Holes-COOLED.1.2-62217/
_________________
53 Canadian standard oval
56 Wolfsburg PG/SG
57 Oval, 2332 & Berg 5
70 911T
91 Westy

[finster]

[tpinthepack]

I just looked at your gallery and you do in fact have heater boxes back in your November pictures so this should be a simple fix by keeping it stock and buying the pipes and connector clamps etc.
_________________
TP in the Pack (I am a cyclist)
1968 Manx N.O.S. w/ Barrett Chassis
1960 Single Cab 1914 w/ 40 DLRA's
1990 Vanagon DOKA
1972 Super Beetle
1979 Super Beetle Convertible
2011 Porsche Cayenne

[SoFloScott]

Thanks guys. Ok I clearly have no idea what I am talking about.

From photo below, can you please answert the following questions?

[Glenn]

OK...

You do have heater boxes.

There are actually 4 heater boxes, one on exhaust pipe. The ones on #1 and #3 (the larger ones) and #2 and #4 (the small ones).


The fan shroud has a outlet on each side. From there a paper/foil hose runs through the larger holes in the engine tin to the small heater boxes on $2 and #4. From there they run to the larger heater boxes on #1 and #3 connected by a wide metal band clamp. From there they exit the front via a large plastic hose to the body of the vehicle.

In this diagram the bottom is your setup.

The hose #22 connects to the fan shroud outlet.
#27 is the wide band clamp that connects the small and large heater boxes.
#5 at the bottom is the large heater box.

_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[Trevor P]

If you are still running heater boxes then I'd recommend to leave the hoses from fan shroud in place. By eliminating the hoses and having no airflow through the boxes you will cause higher exhaust temps leading to higher head temps. If you want to eliminate the hoses and plug the shroud outlets, then remove the boxes and install J pipes.
_________________
53 Canadian standard oval
56 Wolfsburg PG/SG
57 Oval, 2332 & Berg 5
70 911T
91 Westy

[Lind]

[mandraks]

[69aircooled]

Since you have heater boxes on your engine you should at least get hoses and connections #22 and #9 shown in Glenn’s post. You may need the clamps as well. These will help keep the heater boxes from getter too hot as mentioned above. The smaller holes should then be closed up.

[Clara]

Here is the FAQ https://www.thesamba.com/vw/forum/viewtopic.php?t=71827
It has lots of useful info.

There is a thread on heating/cooling system in the VW. The cooling system is the heating system, and the heating system is the cooling system.
The cooling air is not cooling the engine if it is blowing out into the engine compartment. That should be sorted out ASAP.
Read up here:
https://www.thesamba.com/vw/forum/viewtopic.php?t=434051
There are a few differences for a split bus... as in the bus muffler has one tailpipe rather than two for the beetle, and the air cleaner is slightly different, but basically it is the same system.

[Culito]