99 chevy 3500 with 350 timing chain help - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-03-2015, 12:53 PM   #1
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Default 99 chevy 3500 with 350 timing chain help

this truck jumped time got the timing cover off and chain was really lose and the marks on crank and cam sprockets were way off. about to put new sprockets and chain back on just wanted to make sure I'm right with putting the dot on the cam sprocket straight down and the mark and on the crank sprocket straight up so they are in line with each other ?
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Old 01-03-2015, 01:28 PM   #2
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Correct...but. You have an interference engine. Which means, if out of time, your pistons hit your valves. Causing who knows what kind of damage to the valves, rockers, push rods, lifters and pistons. Right now, you probably need to worry about pulling heads.
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Old 01-03-2015, 03:19 PM   #3
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thanks was just wanting to make sure I figured that there will be some bent valves but you never know I might have won the lottery and nothing got bent but if it did I will have something to fill in any free time that I thought I might have had lol thanks for the reply and happy new year to you.
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Old 01-03-2015, 03:55 PM   #4
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Your welcome and good luck.
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Old 01-04-2015, 07:55 PM   #5
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got it back together today we can't get it to start. We got fire and we got fuel. checked compression got 100lbs on one cylinder on passenger side. checked it on driver side with a different gauge and it'* hitting 150 but immediately goes back to zero. I think that gauge might be bad cause I'm pretty sure they suppose to hold the high pressure until you press the release valve. but while turning it over its not popping or nothing just won't crank we checked fire,gas, and compression until we ran out of daylight. gonna get at it again tomorrow.
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Old 01-04-2015, 11:32 PM   #6
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You need to pull all plugs and check for compression on each one. Not just one, but all of them.
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Old 01-05-2015, 12:27 AM   #7
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indeed that was the first thing on my list when the sun rises in the morning
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Old 01-05-2015, 08:24 AM   #8
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i think the parts stores will rent you one free if yo want to compare.
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Old 01-05-2015, 11:48 AM   #9
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I got one but thanks for the info
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Old 01-05-2015, 11:52 AM   #10
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actually I got three but that one did have a leak when I swapped it out I got compression on all cylinders.
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