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05-04-2024, 07:09 AM
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#2 |
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Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,002
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Re: Knocking. Valves?
Could be valves. Could be something else. Try slowing down the engine by retarding the spark. If the noise goes away then the ignition is too far advanced. Or you may be able to better tell where the noise is coming from with a slower running engine.
Use a mechanic's stethoscope to determine where the noise is coming from. Or use a wooden rod held near one ear. Or use a rubber or plastic hose held near your ear. Touch the other end of the stethoscope or rod on the valve cover or other place like the cover for the cam gear. Or hold the hose near those areas.
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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05-04-2024, 07:16 AM
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#3 |
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Member
Join Date: Sep 2018
Posts: 89
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Re: Knocking. Valves?
the sound of silence is deafening.
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05-04-2024, 05:35 PM
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#4 |
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Senior Member
Join Date: Sep 2012
Location: CA
Posts: 207
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Re: Knocking. Valves?
have you checked the valve guides
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05-04-2024, 05:43 PM
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#5 |
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Senior Member
Join Date: Jan 2016
Posts: 2,124
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Re: Knocking. Valves?
Sounds like valves but I can not tell. Install your timing pin in backwards to the timing gear.
Start the car and apply a firm pressure to the gear with the pin as its running. If the noise gets quieter then we know its the timing gear. Nk's recommendation about a mechanic's stethoscope is perfect. Amazon or HF. |
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05-05-2024, 12:04 AM
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#6 |
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Member
Join Date: Aug 2013
Location: Santa Clarita, CA
Posts: 63
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Re: Knocking. Valves?
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05-05-2024, 05:03 AM
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#7 |
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Senior Member
Join Date: May 2010
Posts: 2,608
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Re: Knocking. Valves?
Is the fan blade loose on the water pump shaft or hub?
Disconnect fan belt from engine pulley for a short time and see if noise stops. Generator pulley loose? |
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05-06-2024, 10:46 AM
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#8 |
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Member
Join Date: Aug 2013
Location: Santa Clarita, CA
Posts: 63
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Re: Knocking. Valves?
Fan blade is tight and I have a thrust collar on the pump shaft. But, my crank pulley wobbles quite a bit. It is a two piece pulley. I grabbed a one piece from a friend and will swap it out.
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05-08-2024, 08:58 AM
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#9 |
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Senior Member
Join Date: May 2010
Location: Mansfield, Ohio
Posts: 420
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Re: Knocking. Valves?
I hope you don't have to tear that engine apart. You sure have it painted nice.
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05-08-2024, 01:50 PM
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#10 |
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Senior Member
Join Date: May 2010
Location: Concord CA
Posts: 649
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Re: Knocking. Valves?
If the ratchet nut bottoms out and the pully is loose, you need to fashion a washer to put between the nut and pulley.
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05-08-2024, 01:52 PM
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#11 |
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Senior Member
Join Date: May 2010
Location: Concord CA
Posts: 649
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Re: Knocking. Valves?
Woops wrong thread!
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05-08-2024, 05:54 PM
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#12 |
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Senior Member
Join Date: Jun 2022
Location: Baldwinsville NY
Posts: 176
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Re: Knocking. Valves?
I believe my valves sound the same when running.
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05-12-2024, 07:55 PM
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#13 |
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Member
Join Date: Aug 2013
Location: Santa Clarita, CA
Posts: 63
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Re: Knocking. Valves?
I replaced the pulley with a one piece. It sounds a little smoother. But still a some knocking. Maybe I just never noticed it before. Like SmokedTires says. It might just be the way it's supposed to sound. I'll keep putting MMO in the gas and keep an eye on it.
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