smoke inside car

[den912]

ive just connected the flapper boxes to my 912 swb on it,s first journey out the car filled up with what i can only assume was exhaust fumes can any one tell me why this happened many thanks brian

[twistoffat]

Are the heater boxes fitted tightly? I spotted this on a 912 site a few days ago.

From: Douglas Melvin; TIs it colder in your car than it is outside? Or are the fumes from turning on your heater making you ill or drowsy? Granted, the heaters in our cars are somewhat marginal, but they will work better if you align the 4 wires (2, actually, bent in half at the pull) that go to the 2 heater boxes and heater valves. Jack up the back of your car (use jackstands!) and, with the lever pulled fully back (on), slide under the car and check to see if both heater boxflaps are in the correct positions...the one nearest the rear of the car being almost vertical (the bottom towards the front), and the front one completely flush with the rest of the box. These sometimes get bent, so a little re-bending might make them work correctly.
Now look further forward, where the hoses (you do have good hoses?) go from the heater box to the heater valves. These should be closed...in other words, you should not be able to see through the little holes in the round flap. If any of these is not as it should be, you have to adjust the length of the wire by loosening the cinch nut that holds it in place, pulling the wire, and re-cinching. These MUST work in concert for your heater to work correctly.

[T77911S]

most likely oil burning off heater boxes.

[den912]

i did spray oil on some rusty bolts and on the heater valves the smoke was the same colour as exhaust gases thats what made me think it was the exhaust