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Mod | | Forums66 Topics126,776 Posts1,039,271 Members48,100 | Most Online2,175 Jul 21st, 2025 | | | Joined: Mar 2010 Posts: 61 Shop Shark | Shop Shark Joined: Mar 2010 Posts: 61 | O.K. this is a new thread following my No Spark one. Update. I have fuel, Have a good spark( may coil tested bad in the secondary circut) with new coil but still no start. So, now I sit an think what did I do wrong. Timing gears on the money(dot to dot on gears),every bolts tighted to spec, holycow I did not adjust my rockers correctly! I just tighten them down without finding TDC on each cylinder. I need assistant on this procedure. Do I rotate the pushrod side to side or do I lift it up and down for adjustment? Do you guys think I bent a pushrod? I would like an explanation of the valve layout, starting with the one closes to the front of the engine example intake,exhaust right on down the line. THis way I will know which one is correct. I have a 292 engine.
Last edited by Born Lucky; 11/05/2011 1:59 PM. Reason: more information
| | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | The simplest way to tell if you're working on intake or exhaust valves is to look at the corresponding manifold runner. Other than the very end valves front and rear (which are both exhaust, BTW), two valves will share a single manifold runner. Counting from the front, here's the layout:
E-I-I-E-E-I-I-E-E-I-I-E
The pistons on two cylinders reach TDC at once, one on compression, the other on exhaust. These are known as "companion cylinders". Here's the companion cylinder pairs:
1-6 2-5 3-4
To get an accurate position for valve adjustment, watch the valves on the companion cylinder to the one you're about to adjust. As one cylinder reaches the top of the exhaust stroke, the exhaust valve will be closing, and the intake will be starting to open. This is known as "rocking". At the same time, the companion cylinder will be at the top of its compression stroke with both valves closed. Turn the engine clockwise at the harmonic balancer, either by putting the vehicle in gear and rolling it forward, or using a socket on the crankshaft pulley bolt, and watch the valves. Watch the #6 valves. When #6 is rocking, adjust intake and exhaust on #1. Continue until all the valves are adjusted. It will require two turns of the crankshaft to adjust the valves on all six cylinders. Here's the sequence:
Rock #6, adjust #1 Rock #2, adjust #5 Rock #4, adjust #3 Rock #1, adjust #6 Rock #5, adjust #2 Rock #3, adjust #4
To adjust hydraulic lifters, back the rocker nut off until there is plenty of slack in the pushrod with the cylinder at TDC on the compression stroke, then tighten the nut slowly until all the slack is gone. If the pushrod turns easily, there's still some slack. Once the slack is gone, turn the nut another 3/4 turn. Adjust both valves before moving the engine to the next TDC position. Good luck! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | Joined: Mar 2010 Posts: 61 Shop Shark | Shop Shark Joined: Mar 2010 Posts: 61 | The simplest way to tell if you're working on intake or exhaust valves is to look at the corresponding manifold runner. Other than the very end valves front and rear (which are both exhaust, BTW), two valves will share a single manifold runner. Counting from the front, here's the layout:
E-I-I-E-E-I-I-E-E-I-I-E
The pistons on two cylinders reach TDC at once, one on compression, the other on exhaust. These are known as "companion cylinders". Here's the companion cylinder pairs:
1-6 2-5 3-4
To get an accurate position for valve adjustment, watch the valves on the companion cylinder to the one you're about to adjust. As one cylinder reaches the top of the exhaust stroke, the exhaust valve will be closing, and the intake will be starting to open. This is known as "rocking". At the same time, the companion cylinder will be at the top of its compression stroke with both valves closed. Turn the engine clockwise at the harmonic balancer, either by putting the vehicle in gear and rolling it forward, or using a socket on the crankshaft pulley bolt, and watch the valves. Watch the #6 valves. When #6 is rocking, adjust intake and exhaust on #1. Continue until all the valves are adjusted. It will require two turns of the crankshaft to adjust the valves on all six cylinders. Here's the sequence:
Rock #6, adjust #1 Rock #2, adjust #5 Rock #4, adjust #3 Rock #1, adjust #6 Rock #5, adjust #2 Rock #3, adjust #4
To adjust hydraulic lifters, back the rocker nut off until there is plenty of slack in the pushrod with the cylinder at TDC on the compression stroke, then tighten the nut slowly until all the slack is gone. If the pushrod turns easily, there's still some slack. Once the slack is gone, turn the nut another 3/4 turn. Adjust both valves before moving the engine to the next TDC position. Good luck! Jerry When you state rock, can you explain what does that mean? | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | As one cylinder reaches the top of the exhaust stroke, the exhaust valve will be closing, and the intake will be starting to open. This is known as "rocking".
It's in the third paragraph of the post you just quoted. Jerry
Last edited by Hotrod Lincoln; 11/06/2011 1:06 AM.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | Joined: Mar 2010 Posts: 61 Shop Shark | Shop Shark Joined: Mar 2010 Posts: 61 | Thank you HotRod Lincoln Your the man, your explanations are tops. I beleive you should write some tips for the forum. Thanks again | | | | Joined: Mar 2010 Posts: 61 Shop Shark | Shop Shark Joined: Mar 2010 Posts: 61 | Finally a start!!!!!!!!!!!! I now have to fine tune things, Thanks to all
Last edited by Born Lucky; 11/08/2011 4:46 PM. Reason: spelling
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