Double check the plug wires.
lt1 timing help
Thread Starter
Racer
Joined: Apr 2006
Posts: 327
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From: edgerton WI
lt1 timing help
HELP!!!! I used a short block from a lt1 with 2 bolt mains. My heads and cam went on and I used corvette timing chane. Everything went together as it should. When I tried to start it sounds out of time. When it dose start it runs rough. My question is, dose the corvette use a differant timing chane? And are the crank shafts the same?
Thread Starter
Racer
Joined: Apr 2006
Posts: 327
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From: edgerton WI
The distribitor can only go together one way and I checked it and it was together the right way. I know the battery is shot. Will switch out tomarow. Is it posabile that starting with a 250 amp charger is my prob? The batt. will not hold a charge at all.
Race Director
Joined: Apr 2000
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From: Texas
The 250A charger has nothing to do with how it runs nor the inability of the battery to hold a charge. Once running, the car runs off the alternator not the battery. Perhaps the alternator is bad.
Thread Starter
Racer
Joined: Apr 2006
Posts: 327
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From: edgerton WI
I checked the plug wires and they are still in the right order. lol .... Can the opti seat by hand easily if in wrong position? The hole with the mark goes on the cam pin, how can it go on wrong? Will it go all the way into one of the other holes without forcing it?
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Race Director
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From: Texas
On all the '95-'96 Opti's I've seen, there is no hole with a mark. The slot that the cam pin goes into is rectangular. The other slots are hour-glass shape. When installed incorrectly, the pin will be to either side of the correct rectangular slot, advancing or retarding the timing (depending on which side of the slot) about 20*....just enough that the car will run but not well. Chevrolet should have just had one slot machined with no other recesses and then there'd never been an issue.
The only other thing I can think of is that you over-tightened the rocker arms.
You have never stated what year car, engine, or PCM you are using. Based on your name I assume it's some sort of '84/'96 hybrid. Providing all the pertinent information usually helps
Thread Starter
Racer
Joined: Apr 2006
Posts: 327
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From: edgerton WI
I will recheck the rocker arm adjustment That is the only thing I have not checked 5 or 6 times and found to be correct. By the way I am working on a 95 lt1 . The name is for my 84 and my 96. The 95 is my neighbors car.
Instructor
Joined: May 2006
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From: Edgerton Wi
Yes because what people do (and they don't realize it), is that they slightly tilt the Opti during install. When they do this, the top two mounting points are flush against the timing cover and they think the Opti is installed correctly. They can't see the third mounting point very well and the Opti will feel like it's seated correctly. Then they put in the three bolts and tighten them down.
On all the '95-'96 Opti's I've seen, there is no hole with a mark. The slot that the cam pin goes into is rectangular. The other slots are hour-glass shape. When installed incorrectly, the pin will be to either side of the correct rectangular slot, advancing or retarding the timing (depending on which side of the slot) about 20*....just enough that the car will run but not well. Chevrolet should have just had one slot machined with no other recesses and then there'd never been an issue.
The only other thing I can think of is that you over-tightened the rocker arms.
You have never stated what year car, engine, or PCM you are using. Based on your name I assume it's some sort of '84/'96 hybrid. Providing all the pertinent information usually helps
On all the '95-'96 Opti's I've seen, there is no hole with a mark. The slot that the cam pin goes into is rectangular. The other slots are hour-glass shape. When installed incorrectly, the pin will be to either side of the correct rectangular slot, advancing or retarding the timing (depending on which side of the slot) about 20*....just enough that the car will run but not well. Chevrolet should have just had one slot machined with no other recesses and then there'd never been an issue.
The only other thing I can think of is that you over-tightened the rocker arms.
You have never stated what year car, engine, or PCM you are using. Based on your name I assume it's some sort of '84/'96 hybrid. Providing all the pertinent information usually helps
