Timing Chain Snapped (Bent Valves?)
Timing Chain Snapped (Bent Valves?)
My timing chain snapped recently I was cranking down the road at 35 I lightly accelerated and the thing snapped I rolled it into a parking lot and tried cranking it it wouldnt start had it towed home took it all apart got the new timing chain and waiting on a water pump gasket. Now what I am wondering would I have any bent valves? I also wanted to make sure that I have the crank and the cam alligned the way I was told to do it is turn the crank so that the little guide notch is up and the little notch on the cam is facing down I really hope I get a reply before I put it all back together and fudge it all up again.
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Joined: Oct 2003
Posts: 405
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From: South Florida (NW_Broward)
Car: 1989 Firebird
Engine: 2.8L V6 MPFI
Transmission: Beat to heck 700R4
You don't have any valve problems as a result.
Find out where the dizzy is pointed, then rotate the engine until that cylinder is at TDC on the *COMPRESSION* stroke. Real easy to see if you pull the valve covers and ID the intake/exhaust lifters. That'll get you close. Now move the cam until the timing mark is down, that'll set your cam at #1 TDC. If you watch the valves you should see the progression. Its possible to set this to #1 TDC on the exhaust stroke, so make sure.
Then simply rotate the engine until the #1 piston is at TDC - your timing mark should be UP. If its any other direction, then your not on the piston compression stroke, go to the next upwards motion - which should now be UP. Get the chain on and button her up.
Find out where the dizzy is pointed, then rotate the engine until that cylinder is at TDC on the *COMPRESSION* stroke. Real easy to see if you pull the valve covers and ID the intake/exhaust lifters. That'll get you close. Now move the cam until the timing mark is down, that'll set your cam at #1 TDC. If you watch the valves you should see the progression. Its possible to set this to #1 TDC on the exhaust stroke, so make sure.
Then simply rotate the engine until the #1 piston is at TDC - your timing mark should be UP. If its any other direction, then your not on the piston compression stroke, go to the next upwards motion - which should now be UP. Get the chain on and button her up.
I was told to align the two notches on the crank and the cam gears so they match up to the notches of tensioner here's a pic to show what I mean is this not correct?
Originally Posted by bobdole369
You don't have any valve problems as a result.
Find out where the dizzy is pointed, then rotate the engine until that cylinder is at TDC on the *COMPRESSION* stroke. Real easy to see if you pull the valve covers and ID the intake/exhaust lifters. That'll get you close. Now move the cam until the timing mark is down, that'll set your cam at #1 TDC. If you watch the valves you should see the progression. Its possible to set this to #1 TDC on the exhaust stroke, so make sure.
Then simply rotate the engine until the #1 piston is at TDC - your timing mark should be UP. If its any other direction, then your not on the piston compression stroke, go to the next upwards motion - which should now be UP. Get the chain on and button her up.
Find out where the dizzy is pointed, then rotate the engine until that cylinder is at TDC on the *COMPRESSION* stroke. Real easy to see if you pull the valve covers and ID the intake/exhaust lifters. That'll get you close. Now move the cam until the timing mark is down, that'll set your cam at #1 TDC. If you watch the valves you should see the progression. Its possible to set this to #1 TDC on the exhaust stroke, so make sure.
Then simply rotate the engine until the #1 piston is at TDC - your timing mark should be UP. If its any other direction, then your not on the piston compression stroke, go to the next upwards motion - which should now be UP. Get the chain on and button her up.
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