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Old August 10th, 2009, 10:51 PM   #1
84ChevyMuscle
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My question is what are the symptoms of a timing chain that is loose, i've got a 79 chevy 350 and it just seems like i cannot get the thing timmed correctly. i hooked a vaccum gauge up to the carb and the thing goes mad (told thats how you can tell), tell me this is correct. It runs like it has a lack of power almost like it has a dead cylinder at an idle, but when i get on her she seems to fire on all eight. Would a timing chain cause these problems???
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Old August 11th, 2009, 12:18 AM   #2
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usually a bad timing chain will cause erratic timing. this can be checked with a timing light. rev the engine to 2000 rpm and hold it. look at the timing marks and see if they jump around. chances are good if they jump around the chain is loose. i've seen some so loose they hit the cover and make a knocking sound. person pulled the engine thinking it was blown only to find that.
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Old August 11th, 2009, 10:15 PM   #3
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thanks kodiak 450r, ill have to break out the timing and try that, im pretty sure its loose, now would my vaccum like i said be erratic also or am i wrong
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Old August 12th, 2009, 09:28 AM   #4
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yes that can also be a symptom. i forgot about that in my first post. thats caused by the cam timing jumping around.
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