ac belt jumping
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ac belt jumping
installed factory ac in 78 150 with a 460. converted to r134a and charged with 2 lb 15 oz . the engine has correct crank and double groove waterpump pulleys also installed extra idler pulley but no matter what i do can not get the belts to stop vibrating when compressor is engaged. mabe this is normal for these old time compressors and im chasing a ghost? if any one has any ideas please let me know. havent had a 70s ford since the early 90s so i dont remember if the ac belt did the same thing then.
Tuned
Joined: Nov 2009
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From: Austin, Tx.
Sometimes, due to the length of the belt, it is very hard to stop them from "vibrating" under load. If it is not making any undue noise, I wouldn't worry about it. Be very careful about over-tightening it, you could ruin the front bearings in the compressor very rapidly.
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to drumfield thanks for the input im going to try getting a shorter belt on the engine. i put this system in over a year ago and this problem has been driving me crazy thanks for confirming my thought that the problem was somewhat inherit to this system.
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