Loud, constant ticking - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-04-2006, 11:16 AM   #11
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Quote:
Originally Posted by petraman
No no no, I know what contracting metal sounds like, this is more constant, ticking like 5 times a second
Sounds like pressure being relieved through a small orifice or valve acting like a check valve. Could be a vacuum reservoir bleeding down or maybe a component in the fuel or cooling system. I would suppose vacuum is the most likely.
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Old 10-04-2006, 11:46 AM   #12
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Petey, are you sure it'* coming from the SCer?
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Old 10-04-2006, 12:37 PM   #13
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Quote:
Originally Posted by bill buttermore
Quote:
Originally Posted by petraman
No no no, I know what contracting metal sounds like, this is more constant, ticking like 5 times a second
Sounds like pressure being relieved through a small orifice or valve acting like a check valve. Could be a vacuum reservoir bleeding down or maybe a component in the fuel or cooling system. I would suppose vacuum is the most likely.
Easy method to test this:

1. Pull the vacuum lines off the shift modulator and vacuum reservior while it'* ticking. Does it stop?

2. Bleed the fuel pressure at the rail (into a rag, the engine is hot). Does it stop?
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Old 10-04-2006, 12:46 PM   #14
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Wow, thanks guys! I'm going to try Will'* method tomorrow, as I'm kinda busy today. Is this looking like a major problem, or what?
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Old 10-04-2006, 12:51 PM   #15
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It'* not a major problem, not even a problem.

If either of these stop the ticking, write it up to normal cooldown. Even pressing the brake pedal may stop it. Assuming it'* vacuum related.
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