Slant Six Forum :: Engine Knock - Engine Setting Related?

I was busy all day yesterday. I will get to these tests soon. I will time the engine first.

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I was busy all day yesterday. I will get to these tests soon. I will time the engine first.

Sorry ,I did not mean to be pushy ,Im just curious about the noise ,I have a thing for Knock Knock Threads!

Also earlier you stated you have a leaky head gasket.
By this do you mean the rocker cover gasket ,or the actual head gasket that keeps the compression in?
If you have a leaky head gasket ,and it leaks coolant into the oil,the oil can turn acidic and eat your bearings!
Brendan.

if i KNEW i had a leaky head gasket (and particularly if it were knocking), i think i would pull the head. note: this may lead to pulling the engine, depending on what you find.

how do you know the head gasket is leaking? depending on the leak location, you could leak coolant into the cylinder, which can cause the engine to hydrolock and create serious damage. in all seriousness, if the head is leaking it needs to be repaired pronto.

Author:	Aggressive Ted [ Sun May 12, 2013 7:10 pm ]
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I having been running a medium priced mechanical gauge the last 10 years off the pressure switch location but tossed the nylon line that it came with and went with some nice soft copper to avoid any potential leaks. The copper line provides good insurance.

Author:	slantsik [ Sun May 12, 2013 10:29 pm ]
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Have you done the rod knock test I described yet. That test can isolate the problem to one cylinder. it can reduce the noise of broken rings ,piston slap and big end knock then do further tests on that cylinder if a noise reduction is evident. Also dont forget that oil pressure can be low due to excessive bearing clearance ie worn main /big end bearings. Forget the conspiracy theories for now, and concentrate on diagnosing the problem,not guessing at it. you might also want to grab yourself a mechanics stethescope.Good cheap tool for this problem. Brendan

Author:	ILMopars [ Mon May 13, 2013 1:25 pm ]
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I was busy all day yesterday. I will get to these tests soon. I will time the engine first.

Author:	slantsik [ Mon May 13, 2013 11:06 pm ]
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Quote: I was busy all day yesterday. I will get to these tests soon. I will time the engine first. Sorry ,I did not mean to be pushy ,Im just curious about the noise ,I have a thing for Knock Knock Threads! Also earlier you stated you have a leaky head gasket. By this do you mean the rocker cover gasket ,or the actual head gasket that keeps the compression in? If you have a leaky head gasket ,and it leaks coolant into the oil,the oil can turn acidic and eat your bearings! Brendan.

Author:	ILMopars [ Tue May 14, 2013 4:39 am ]
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Quote: Quote: I was busy all day yesterday. I will get to these tests soon. I will time the engine first. Sorry ,I did not mean to be pushy ,Im just curious about the noise ,I have a thing for Knock Knock Threads! Also earlier you stated you have a leaky head gasket. By this do you mean the rocker cover gasket ,or the actual head gasket that keeps the compression in? If you have a leaky head gasket ,and it leaks coolant into the oil,the oil can turn acidic and eat your bearings! Brendan. No offense taken. Don't worry about it. I got the timing light and it works great. It irritates me that people cannot read a timing light. I was told 7 ATC but yesterday I got 12 BTC. What the hell? The head gasket is leaky. Oil shows no signs of coolant and all cylinders all have 100psi.

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Engine Knock - Engine Setting Related? https://www.slantsix.org/forum/viewtopic.php?t=52039	Page 2 of 2

Author:	75valiant [ Tue May 14, 2013 8:28 am ]
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if i KNEW i had a leaky head gasket (and particularly if it were knocking), i think i would pull the head. note: this may lead to pulling the engine, depending on what you find. how do you know the head gasket is leaking? depending on the leak location, you could leak coolant into the cylinder, which can cause the engine to hydrolock and create serious damage. in all seriousness, if the head is leaking it needs to be repaired pronto.

Author:	ILMopars [ Tue May 14, 2013 1:00 pm ]
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Quote: if i KNEW i had a leaky head gasket (and particularly if it were knocking), i think i would pull the head. note: this may lead to pulling the engine, depending on what you find. how do you know the head gasket is leaking? depending on the leak location, you could leak coolant into the cylinder, which can cause the engine to hydrolock and create serious damage. in all seriousness, if the head is leaking it needs to be repaired pronto. There is not combustion or coolant leakage. The leak is of oil to the outside. I need the car until the end of July to serve daily driver duty then I need another car. The car will be blown apart and restored after retirement.

Author:	ILMopars [ Tue May 14, 2013 5:46 pm ]
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Engine is now happy at TDC at 670 rpm

Author:	BUCKET 636 [ Wed May 15, 2013 4:08 pm ]
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I recently had a noise in my engine like you describe. Turns out two of my flex plate to torque convertor bolts were loose. One was halfway out and the other was finger tight. Tightened them up and no more clacky tappy rattly knock knock sound.

Author:	ILMopars [ Wed May 15, 2013 4:15 pm ]
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This weekend I will pull the inspection plate and torque them to be sure. Thanks

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