Cam / Distributor Position Confusion
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From: Hamilton
Car: 1990 IROCZ Camaro
Engine: 350 4bbl, 200cc Heads, 270hr Cam
Transmission: 700R4 w/ Trans-Go shift kit.
Axle/Gears: GM 10 bolt Posi
Cam / Distributor Position Confusion
This is going to be slightly long winded, but I ask, please, if you have the time, just read it through, because I am pretty confused here, and I really need a few opinions.
About 2 months ago I put in Brodix IK200 heads and a Comp cam XR270HR-10. (Some of you might remember this). After everything was done, car was very hard to start, ran like crap, stumbled, misfired, stuttered, stalled, shifted wrong, backfired, the works. Went through alot of little things before I finally pulled out the distributor (two weeks ago) and the timing chain cover today. Here is what I found:
When I initially put the cam in, I aligned the dots on the crank gear and cam gear, and put everything back together. I later found out that the dots were supposed to line up, THEN turn it one time, THEN put heads on, etc. So now, when I am TDC on the compression stroke of #1 Cylinder, the dots on the gears are lined up, NOT at 12 and 12 like they should be. I know this from watching the valves on the #1 cylinder move. When intake opens and closes (compression stroke) the dots line up. These dots should be lining up on the exhaust stroke.
Now, you would think "well take out the gears and rotate them until you get the configuration you are looking for". Alright, but stay with me, Im gonna jump back to two weeks ago before I pulled the timing cover, and I only took out the distributor.
Two weeks ago, I pulled my distributor cap off, to find that when the distributor was pointing at #6, the #1 cylinder was on its compression stroke. Naturally I flipped the distributor 180 degrees, to make it fire on the #1 cylinder on the compression stroke, and it would not even start, let alone run like crap like before. So, I changed it back to the way it was, with the rotor pointing at 6, but compression happening at 1.
So, the cam is on the wrong stroke (according to the dot configuration on the gears), but the distributor wants to fire while the exhaust stroke is happening. Somehow, this is making the car run somewhat, but when the distributor fires on the compression stroke of the cylinder, it wont even start at all.
I want to start from square one all over again and get the gears lined up the way they should, but I can't think of a way to get the cam gear to turn independantly of the crank gear. Anyone know how I can do this?
About 2 months ago I put in Brodix IK200 heads and a Comp cam XR270HR-10. (Some of you might remember this). After everything was done, car was very hard to start, ran like crap, stumbled, misfired, stuttered, stalled, shifted wrong, backfired, the works. Went through alot of little things before I finally pulled out the distributor (two weeks ago) and the timing chain cover today. Here is what I found:
When I initially put the cam in, I aligned the dots on the crank gear and cam gear, and put everything back together. I later found out that the dots were supposed to line up, THEN turn it one time, THEN put heads on, etc. So now, when I am TDC on the compression stroke of #1 Cylinder, the dots on the gears are lined up, NOT at 12 and 12 like they should be. I know this from watching the valves on the #1 cylinder move. When intake opens and closes (compression stroke) the dots line up. These dots should be lining up on the exhaust stroke.
Now, you would think "well take out the gears and rotate them until you get the configuration you are looking for". Alright, but stay with me, Im gonna jump back to two weeks ago before I pulled the timing cover, and I only took out the distributor.
Two weeks ago, I pulled my distributor cap off, to find that when the distributor was pointing at #6, the #1 cylinder was on its compression stroke. Naturally I flipped the distributor 180 degrees, to make it fire on the #1 cylinder on the compression stroke, and it would not even start, let alone run like crap like before. So, I changed it back to the way it was, with the rotor pointing at 6, but compression happening at 1.
So, the cam is on the wrong stroke (according to the dot configuration on the gears), but the distributor wants to fire while the exhaust stroke is happening. Somehow, this is making the car run somewhat, but when the distributor fires on the compression stroke of the cylinder, it wont even start at all.
I want to start from square one all over again and get the gears lined up the way they should, but I can't think of a way to get the cam gear to turn independantly of the crank gear. Anyone know how I can do this?
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Joined: Aug 2006
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From: Doghouse
Car: Pro Stadium Tough Truck
Engine: Buick V6 272 cu in
Transmission: TH350
Axle/Gears: Broken most of the time
First it would be a good idea to buy a good manual and read through engine assembly a couple times. I don't mean to say this in a negative way. That is not my intention. Your issues can be confusing.
The only way to get the cam to rotate independent of the crank is to take off the timing chain.
The only way to get the cam to rotate independent of the crank is to take off the timing chain.
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