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07-28-2009, 01:33 PM | #1 | |
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Passenger side ticking/rattle noise
'99 Blazer 4wd 4.3L auto trans, 157k.
I recently replaced (4 mo) head and lower intake gaskets and R side head due to coolant leak into #6 cyl causing cracked head. I recently noticed a "ticking" sound coming from that side during acceleration but not audible at idle. I am thinking a bad valve or lifter, but would appreciate any wisdom. Oil level is normal, recently changed it with Valvoline High mileage, have not checked the plug magnet yet but will do so this weekend when I have time. Please give me some good news, this thing is killin' me right now! |
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07-28-2009, 03:01 PM | #2 | ||
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Re: Passenger side ticking/rattle noise
Quote:
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Remember proper testing gives us the answer to many problems. MT |
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07-28-2009, 04:17 PM | #3 | |
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Re: Passenger side ticking/rattle noise
I was thinking that could be an option because of the sound, but what is an easy way to diagnose? I replaced the exhaust gaskets during the previously mentioned repairwork and resurfaced the mating surface on the manifold. Thanks for your help...
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07-28-2009, 05:08 PM | #4 | ||
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Re: Passenger side ticking/rattle noise
Quote:
Exhaust leak makes more noise cold and some times black around leak.
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07-29-2009, 10:52 AM | #5 | |
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Re: Passenger side ticking/rattle noise
Sounds like what I call NORMAL for the 4.3L Blazer. Mine does it also along with the piston slaps. It has been doing it for over 30,000 miles. So I wouldn't worry about it until it blows up. That is what I'm doing.
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08-22-2009, 03:25 PM | #6 | |
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Re: Passenger side ticking/rattle noise
Sounds like the noise is coming from y pipe/manifold area. I took both y pipe apart to be able to move exhaust and still could not get at the donut gasket to replace it. I could inspect it and it looks worn but not bad. Am I missing something here to make this easier to remove? I just couldn't get enough clearance to remove it. I hope I dont need to remove the manifold to do this seamingly easy repair. All manifold bolts were tight and gaskets looked ok from what I could see. Thanks for your help.
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08-23-2009, 04:26 PM | #7 | |
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Re: Passenger side ticking/rattle noise
Mine was doing the same thing. Catalytic convertor had come apart inside.
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08-23-2009, 08:18 PM | #8 | ||
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Re: Passenger side ticking/rattle noise
Quote:
Lay under your truck and bang on your converter. If you hear the noise then you need a new converter.
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08-26-2009, 01:00 PM | #9 | |
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Re: Passenger side ticking/rattle noise
Just a thought on not wanting to remove the manifolds - pull the bolts for the motor mounts and lift the engine a little bit...
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08-29-2009, 08:31 PM | #10 | |
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Re: Passenger side ticking/rattle noise
Replaced right donut gasket today and it was not cause of noise. Continued to look further and noticed black residue around #2 ex manifold on head. It seems the gasket slipped and rotated forward causing the backside to leak. Bolts were tight and it looked like the gasket had migrated somehow to cause leak. Maybe when I put them in during previous work? Anyways, problem fixed for now. I read on Autozone repair guide 2 middle bolts torque to 11 ft and others to 22 ft. Is that correct? Thanks for the assistance fellas! Now onto the radiator leak, again!
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Tags |
lifter , noise , rattle , ticking , valve |
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