AIR CLEANER VACUUM UNIT/air temperature control unit

telboy · Post by **telboy** » Wed Mar 28, 2007 6:54 pm

Hello again, wonder if anyone can help me with what i'm sure is an easy problem to fix. i'm just wondering where the pipe from the air cleaner vacuum unit attaches to as my car didn't have a pipe connected & i've heard it might help me with my carb icing problem. To help, in the haynes manual its also called a air temperature control unit. theres a little flap inside which governs the amount of cold air going into the carb, this is done by vacuum, but from where

many thanks

hypojam · Post by **hypojam** » Wed Mar 28, 2007 8:58 pm

There's a vacuum tube on the base of the carb, almost directly underneath the air filter temp sensor

telboy · Post by **telboy** » Wed Mar 28, 2007 10:11 pm

Thanks for that, i'll take a look tomorrow

telboy · Post by **telboy** » Fri Mar 30, 2007 4:36 pm

Thanks for your help hypojam but i think i didn't explain very well

ops
At the end of the air filter housing there is a air temp sensor which cold air travels to the carb but there is a flap which governs this,the flap is operated by a pipe which is attached, but where the other end goes i don't know

all the other pipes are attached i.e to the bottom of the carb and to the dizzy advance/retard. Thanks again for your help.

steveo3002 · Post by **steveo3002** » Fri Mar 30, 2007 4:54 pm

do you mean the big flexi hose from the aircleaner to the exh manifold?

telboy · Post by **telboy** » Fri Mar 30, 2007 5:17 pm

No it just a small rubber pipe about 3-4mm in diameter. it comes off the top of the air cleaner above the large metallic flexihose.

omicron · Post by **omicron** » Fri Mar 30, 2007 6:51 pm

Depends on the car.

If we're talking about the very, very slim peice of hose that comes off the top of the air intake, it either goes to the carb (Solex carb) or the vacuum unit on the distributor (pierberg carb)

hypojam · Post by **hypojam** » Fri Mar 30, 2007 11:20 pm

telboy wrote:Thanks for your help hypojam but i think i didn't explain very well ops
At the end of the air filter housing there is a air temp sensor which cold air travels to the carb but there is a flap which governs this,the flap is operated by a pipe which is attached, but where the other end goes i don't know all the other pipes are attached i.e to the bottom of the carb and to the dizzy advance/retard. Thanks again for your help.

The tube that goes from the hot air flap vacuum unit goes to the underneath of the filter housing

There's 2 vacuum connections underneath the air filter housing, left one goes too hot air flap. The right one goes to vacuum connection on base of the carb

There's also another vacuum connection from the carb that goes to the vacuum advance on the dizzy but its unrelated to what your asking.

telboy · Post by **telboy** » Sat Mar 31, 2007 12:57 pm

Thanks all sorted now