Need help. Loud clicking from motor
06-05-2005, 10:51 PM
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Need help. Loud clicking from motor My friend just got a complete 02 ls1 motor w 30k miles, tranny, put into his 98 WS6. He has the computer too but he hasnt installed that yet. So the cars been running fine for a few weeks now and today the motor started making this loud clicking maybe ticking noise, not sure which describes it best but its LOUD very loud. I could hear it in a parking lot about 10+ cars away. Anyone know what it is? The motor has all stock internals. Never been sprayed. idle the oil pressure is at 40 PSI.
Could the noise be a spun rod bearing? Did a valve spring break and caused a valve to drop onto the piston?
Could the noise be a spun rod bearing? Did a valve spring break and caused a valve to drop onto the piston?
Last edited by Camaroguy; 06-05-2005 at 11:46 PM.
06-05-2005, 11:30 PM
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Check the spark plugs. Make sure the plugs are in tight and the wires are on. I had the same loud *** ticking noise, and I realized most of my plugs came loose after I replaced them.
06-05-2005, 11:42 PM
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Originally Posted by kpowr82
Check the spark plugs. Make sure the plugs are in tight and the wires are on. I had the same loud *** ticking noise, and I realized most of my plugs came loose after I replaced them.
We'll recheck them. I hope its that. It sounds pretty bad.
We put the plugs and wires on when the motor was out
06-06-2005, 12:58 AM
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Does clicking sound get faster relative to your engines' rev?
I don't know if it applies to LS1, but last time I heard clicking in my car's motor was after I over-rev'd it and bent my valves.
And my buddy's car made LOUD clicking noise after his timing belt slipped on his honda and the valves were hitting the pistons.
I don't know if it applies to LS1, but last time I heard clicking in my car's motor was after I over-rev'd it and bent my valves.
And my buddy's car made LOUD clicking noise after his timing belt slipped on his honda and the valves were hitting the pistons.
06-06-2005, 02:33 AM
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Originally Posted by kim307
Does clicking sound get faster relative to your engines' rev?
I don't know if it applies to LS1, but last time I heard clicking in my car's motor was after I over-rev'd it and bent my valves.
And my buddy's car made LOUD clicking noise after his timing belt slipped on his honda and the valves were hitting the pistons.
I don't know if it applies to LS1, but last time I heard clicking in my car's motor was after I over-rev'd it and bent my valves.
And my buddy's car made LOUD clicking noise after his timing belt slipped on his honda and the valves were hitting the pistons.
06-06-2005, 04:01 PM
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Yep, the ole screwdriver trick. Or cheap man's stethoscope' basically you put it on parts of the motor and listen on the plastic end with your ear. At least you can narrow it down. AFTER you check the plugs and wires; remember, 2 clicks to get the wires on ( barely audible too ).
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06-06-2005, 04:13 PM
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Have u reved the engine high or have u misshifted at all if its a 6spd. A lot of times on LS-1s if u over rev the engine they bend the pushrods happen to me a while back.
06-06-2005, 05:07 PM
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Originally Posted by 99Blk Z28
Have u reved the engine high or have u misshifted at all if its a 6spd. A lot of times on LS-1s if u over rev the engine they bend the pushrods happen to me a while back.
If a pushrod is bent it would only making slight tapping sound. Something faintly noticable if you listen for it. Well his noise is extremely loud. Not even turning up your radio can over come the tapping or clicking.
I get the feeling you guys think its kinda quiet. Its very very loud. If i use the listening with the screw driver method i dont think ill be able to hear anything because the noise is so loud. You could hear the tapping or clicking from 10+ cars away or even half way across the parking lot.
Last edited by Camaroguy; 06-06-2005 at 05:21 PM.
06-09-2005, 01:35 PM
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Originally Posted by Camaroguy
The engine has not been over reved or mis shifted. The noise just suddenly came.
If a pushrod is bent it would only making slight tapping sound. Something faintly noticable if you listen for it. Well his noise is extremely loud. Not even turning up your radio can over come the tapping or clicking.
I get the feeling you guys think its kinda quiet. Its very very loud. If i use the listening with the screw driver method i dont think ill be able to hear anything because the noise is so loud. You could hear the tapping or clicking from 10+ cars away or even half way across the parking lot.
If a pushrod is bent it would only making slight tapping sound. Something faintly noticable if you listen for it. Well his noise is extremely loud. Not even turning up your radio can over come the tapping or clicking.
I get the feeling you guys think its kinda quiet. Its very very loud. If i use the listening with the screw driver method i dont think ill be able to hear anything because the noise is so loud. You could hear the tapping or clicking from 10+ cars away or even half way across the parking lot.
06-09-2005, 02:06 PM
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same problem meaning that really loud tapping......i thought the worst case scenario. It turned out it was a rocker arm that rattled loose and after about an hour and a half the Pontiac dealer fixed it.
06-14-2005, 12:31 AM
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update.
Took the valve covers off today.
All the rockers were in place. They were pretty tight. None of the springs were broken. All the pushrods were straight.
I took out all the rocker arms and put lock tight on the threads when we put them back. Tightened them back down to 22 ft lbs of torque in a two pass sequance rotating the crack.
I did notice that some of the rocker arms would tighten and not move at all. By moving i mean very very little bit left to right. There is no movment or play up and down, but there was very very little movement right to left around the pivit point of the rocker arm where the bearings are it would slightly have alittle play in there to go right and left. But the whole rocker arm didnt move at all. Some did this and some didnt. Why? Is that normal
Took the valve covers off today.
All the rockers were in place. They were pretty tight. None of the springs were broken. All the pushrods were straight.
I took out all the rocker arms and put lock tight on the threads when we put them back. Tightened them back down to 22 ft lbs of torque in a two pass sequance rotating the crack.
I did notice that some of the rocker arms would tighten and not move at all. By moving i mean very very little bit left to right. There is no movment or play up and down, but there was very very little movement right to left around the pivit point of the rocker arm where the bearings are it would slightly have alittle play in there to go right and left. But the whole rocker arm didnt move at all. Some did this and some didnt. Why? Is that normal
06-14-2005, 11:48 AM
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far shot maybe header leak? that sounds like a ticking kind of? when you put headers/manifolds on, it's a good idea to run the motor for a minute, then re-tighten the exhaust bolts to make sure they didn't back out at all with heat expansion. check your header bolts.
other than that... you've rule out bent pushrods, broken springs, and bad/loose rocker arms. so who knows.
other than that... you've rule out bent pushrods, broken springs, and bad/loose rocker arms. so who knows.
06-14-2005, 12:15 PM
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My rocker arms were giving me the same sound you are describing. The first 4 on the driver side would all wiggle from left to right. When I took them off you could wiggle them back and forth pretty good. I bought some roller rockers, and put them on, and now I have no problems. Does the car hesitate at low rpm? That's what mine did when the rockers were messed up. I would check for a header leak next, and like someone said above, make sure the plugs are in good and the wires on good, and listen for the 2 clicks when putting the wires on. If it's not that, then I would say it would be a valve problem. Check your springs also.
06-14-2005, 04:00 PM
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Originally Posted by white_ta
My rocker arms were giving me the same sound you are describing. The first 4 on the driver side would all wiggle from left to right. When I took them off you could wiggle them back and forth pretty good. I bought some roller rockers, and put them on, and now I have no problems. Does the car hesitate at low rpm? That's what mine did when the rockers were messed up. I would check for a header leak next, and like someone said above, make sure the plugs are in good and the wires on good, and listen for the 2 clicks when putting the wires on. If it's not that, then I would say it would be a valve problem. Check your springs also.
Plugs are all on. The header bolts are all nice and tight. I dunno what else to think of. But it sure sounds like something has come apart from the inside.
07-22-2005, 01:29 PM
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update:
pulled the motor out of the car. The noise was caused by 2 spun rod bearings. One of the spun rod bearings were pretty bad.. the bearings managed to slide itself under the other and form one..
Does that mean he needs to get a new crank or can that be re surfaced, Does it need to be re surfaced?
pulled the motor out of the car. The noise was caused by 2 spun rod bearings. One of the spun rod bearings were pretty bad.. the bearings managed to slide itself under the other and form one..
Does that mean he needs to get a new crank or can that be re surfaced, Does it need to be re surfaced?
