why temp difference left and right , exhaust ?


Asked by Apr 24, 2012 at 12:28 PM about the Volkswagen Beetle

Question type: Maintenance & Repair

great  running  69'  .   starts right up ,  and  runs  like  it   should , or ,  so  it  seems  ..    there   is  quite a  difference   
in  exhaust temp  ..  left  and   right  ...   with   the  right side ,  much  hotter   ....  i  put a  72'   dual port in it , out  of a  
junker  ..    could   this   be   valve  adjustment  issues  ?    my  first   bug  ,   $  300  ,  in  the  weeds  ,   and  $400  
later  it   is  about   to  hit  the  road  again   ..   

3 Answers


Sounds like a carb adjustment is needed...One side running leaner than the other...

2 of 2 people found this helpful.

The engine appears to be a dual port. I have had that problem on a couple of engines and it turned out to be sucking air around the head to intake runner. Spray carb cleaner around the gasket with the engine running and see if it makes a difference. If it smooths out change the intake gasket. Hope this helps

2 of 2 people found this helpful.

The pre- 1971 type 1 engines had the oil cooler in the cooling air path of the left cylinders. Because of this, the ignition timing on the number three cylinder is retarded 3 degrees. This makes the cylinder head run slightly cooler than the right side head. If you have an EGT probe on each side of the engine, the temperatures will be different unless the probes are mounted exactly in the same place on the number [1 and 4] or [2 and 3] cylinders. That is nearly impossible to do with a stock exhaust system unless the probes are within just a couple of inches of the head. Dual port engines had the oil cooler relocated forward of the cooling fan shroud in their own "doghouse." Dual port heads on a pre- 1971 case will need some different sheet metal, too, so your engine might be a mixture of both types...

1 of 1 people found this helpful.

Your Answer


Looking for a Used Beetle in your area?

CarGurus has 9,106 nationwide Beetle listings starting at $1,750.


Volkswagen Beetle Experts

  • #1
  • #2
    Chris Billings
  • #3
    Tom Demyan
View All

Related Models For Sale

Used MINI Cooper
173 Great Deals out of 9,881 listings starting at $2,250
Used Volkswagen Jetta
397 Great Deals out of 27,922 listings starting at $1,650
Used Jeep Wrangler
304 Great Deals out of 19,982 listings starting at $2,900
Used Ford Mustang
278 Great Deals out of 38,263 listings starting at $1,995
Used Honda Civic
362 Great Deals out of 50,912 listings starting at $1,200
Used Volkswagen Golf
71 Great Deals out of 4,630 listings starting at $900
Used Honda Accord
539 Great Deals out of 91,748 listings starting at $1,495
Used Volkswagen Passat
288 Great Deals out of 26,067 listings starting at $1,000
Used Toyota Corolla
663 Great Deals out of 65,393 listings starting at $1,599
Used Volkswagen Eos
32 Great Deals out of 1,039 listings starting at $3,550
Used Volkswagen GTI
76 Great Deals out of 6,738 listings starting at $1,100
Used FIAT 500
88 Great Deals out of 3,786 listings starting at $2,900
Used Chevrolet Camaro
252 Great Deals out of 29,972 listings starting at $4,980
Used Toyota Camry
802 Great Deals out of 70,728 listings starting at $1,112
Used Kia Soul
288 Great Deals out of 24,907 listings starting at $3,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.