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carb jets for singel weber, loud rear clunk from rear axle 140-160 1971

posted by  konehead on  Thu Nov 5 12:48 CST 2015
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hi
I have a 71 Volvo 142E with 4 speed manual. It has single weber carburetor plus I put in an earlier model B18 motor into it that I must of came out of a 122 (so not the B20) I am having problems getting the primary and secondary jets just right to the carburetor - what would be anyone's suggestion for best the primary and secondary gas and air jets to it?

Also if I step on the gas hard, or let off gas abruptly, and especially if I am to compression-start the car, there is a huge loud CLUNK coming from the rear end - like somebody hit something with a big hammer type thud sound...not sure if this could maybe be the rear axle itself, and maybe this is the sound of worn out differential or loose gears or loose axle bearing or gears to differential??

I am guessing right now the connecting arms with rubber components holding the rear axle in place have worn out and it "seems like" the whole rear axle assembly gets lurched around and it is the sound of the rear axle smashing itself onto the body of car - this is my guess (so the "big hammer sound is the rear axle itself being the hammer) ....but maybe it is the differential or axles or maybe the shock towers I read somewhere it might be....anyways when I have had a differential go out in cars before it makes that high pitch whiney sound then eventually goes out but this is a very loud clunk and wonder if anyone has experienced something like this to happen....

One more question, is it possible to put in rear axle from an early 240 into this car? Probably not but just wondering...there seems to be always 4 or 5 Volvo 240s at pick-a-part wrecking yard nearby where you pull parts out yourself for really cheap and already I stuffed nice blue cloth front and rear seats that cost only 85 bucks for everything into this car and they look really nice and are very comfortable - also managed to replace the ripped out horrible headliner (previously held in place by magnets) with a one-piece solid headliner from a 240 and it looks super nice like it was from factory - this only cost 20 bucks from the wrecking yard...I can probably get a good rear axle from a 240 for 75 to 100 bucks so that is why I am asking about that....not many 140's around town but thousands of old 240s here in Seattle area....





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