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22 Jul 2009, 12:28 am
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2.4L NA Engine Knock
Ever since I purchased my PT (since 73,000 miles, now has 88,500) the engine has always made a knocking noise. Ive always taken very good care of it, use fully synthetic oil at the proper time intervals, and make sure oil levels are good. My friend, who is a mechanic heard the noise, and said that it sounds like a bad piston rod and that it could be very bad... I will be taken it to his shop to have it inspected.
Does anybody else experience this engine knock at all times? Its been like this ever since I purchased it and I didnt really think much of it until now. Am I at high risk? Any comments appreciated. Thanks, George
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 My Love: 02' Gold PT Cruiser Touring: Pioneer DEH-P4000UB Reciever, Self built subwoofer enclosure w/pioneer TS-SW841D subs, Summit Turbo Muffler, Spectre Modular Air Intake, underseat neon lights, subwoofer neon strip lights, Intake Manifold Paint, exterior chrome trim, steering wheel cover.     
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22 Jul 2009, 06:34 am
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Re: 2.4L NA Engine Knock
How does he propose inspecting? Taking off oil pan?
Hard to comment without hearing the noise. Hope your friend is a good mechanic....
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'05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar. Traded in '02 Silver Touring Edition w/87,000 miles
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22 Jul 2009, 08:01 am
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Re: 2.4L NA Engine Knock
Unless it's really loud, it's probably the piston slap that every PT Cruiser and Neon has.
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1973 Barracuda 340/auto Modifications: Too many. 2002 PT Cruiser N/A 2.4L/5-speed Modifications: Boogers, Maddog 80% STS, Auto throttle body, Airbox modifications, Eibach Pro springs, Energy Suspension control arm bushings & motor mount inserts, disabled balance shafts. 1989 Caprice Wagon 307/auto Modifications: Lowered 2" front and rear, flat black paint, emblems and trim removed and filled, pinstriping, big 'n little tires.
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22 Jul 2009, 12:58 pm
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Re: 2.4L NA Engine Knock
Fuel injectors quite loud and make a deep ticking too. Also seem to recall hearing something about valve tappet lash adjusting not working right and causing a tick.
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22 Jul 2009, 01:44 pm
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Re: 2.4L NA Engine Knock
It isnt really loud, but it is audible. I thought it was normal for PT's to have this sound so I wasnt too worried about it. Thanks for your replies guys, they've given me some comfort.
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My Love: 02' Gold PT Cruiser Touring: Pioneer DEH-P4000UB Reciever, Self built subwoofer enclosure w/pioneer TS-SW841D subs, Summit Turbo Muffler, Spectre Modular Air Intake, underseat neon lights, subwoofer neon strip lights, Intake Manifold Paint, exterior chrome trim, steering wheel cover.
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