mysterous ticking from back of motor - 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 09-15-2005, 05:35 PM   #1
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Default mysterous ticking from back of motor

i started my car this morning and i noticed a ticking from the engine. i narrowed it down to between the rear valve cover and the upper intake. it seems to be only at idle, i cant hear it when i rev. any ideas on what this might be? input apreciated
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Old 09-15-2005, 06:03 PM   #2
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Lifter? Sticky injector?
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Old 09-15-2005, 10:51 PM   #3
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lifter would be a big problem and injector would be not too bad, right?
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Old 09-15-2005, 10:53 PM   #4
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the injectors on the 3.8s all make some kind of noise....
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Old 09-15-2005, 11:03 PM   #5
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Loose rockers I would think.
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Old 09-15-2005, 11:36 PM   #6
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Also possible, (as I was reminded this week on my '95 SLE) is an exhaust leak between the cylinder head and the manifold. Sounds just like a lifter, pretty loud at idle, gets quieter or disappears as you speed up.
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Old 09-16-2005, 06:57 AM   #7
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Quote:
Originally Posted by bill buttermore
Also possible, (as I was reminded this week on my '95 SLE) is an exhaust leak between the cylinder head and the manifold. Sounds just like a lifter, pretty loud at idle, gets quieter or disappears as you speed up.
Agreed.. the hard part is checking the back manifold for cracks
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