Its kinda odd though. It happens when my engine is cold. Once the motor is nice and warmed up, the knocking seems to pretty much go away. My engine has 26000 miles on it too. Could this just be normal warm-up noises? Or is it something I should get checked out?
2007-03-26 19:56:16 · 10 answers · asked by chuckbeanz 1 in Cars & Transportation ➔ Maintenance & Repairs
forgot to mention that I KNOW its coming from my pistons. Just wondering if thats a normal warm-up kinda noise im hearing
2007-03-26 19:57:06 · update #1
2.0L SOHC w/ 26000 miles
2007-03-26 20:05:21 · update #2
No noise is "normal" at start up from the pistons.Sorry.
2007-03-26 20:01:16 · answer #1 · answered by Anonymous · 0⤊ 3⤋
If you have forged pistons they have a greater piston to cylinder wall clearance because as they warm up the forged pistons grow. A normal cast piston has like 3-4 thousandths piston to wall clearance and a forged piston has a 7-8 thousandths piston to wall clearance when cold, which allow the forged piston to grow without seizing up when hot, but makes a knocking sound until the engine is warm.
It's an overhead cam correct? Then it's surely not a lifter, and it's not gasoline, it would knock when its hot.....detonation happens when it's hot not cold.
And yes noise is normal with forged pistons when with cold starts.
But are you sure that it's not bottom end noise? Rod or main bearings could be hammered out.
2007-03-27 03:09:56 · answer #2 · answered by Anonymous · 1⤊ 0⤋
It could just be the valves chattering. Probably just normal warm up noises. Or it could be the type of gas. I had a Chevy Cavalier once that sounded like the valves were going to rattle right out of the motor when I put reg. gas in, but if I used premium they wouldn't rattle. It might be best to have it checked by a pro. who knows what they're talking about though. lol
2007-03-27 03:02:14 · answer #3 · answered by sweet.pjs1 5 · 1⤊ 0⤋
warm up noises are not normal. 26,000 miles way too low to be having such problems. i would take it to a dealer and drive it up someones rear and demand it to be fixed. thats not right at all. most engines today are capable of 150,000 to 200,000 miles if you do proper maintainance, and if you are knocking already you wont make it to 35,000.
unless you meant to say 260,000 that would be pretty normal for an engine to make noises. you are lucky that its still running. at 260,000 miles there is significant wear on all the internal moving parts, and its probably nearing the end of its life.
oil is thicker when its cold, it sits in the oil pan until you start the car and your worn out oil pump starts to circulate it around the engine, as it warms up it flows better lubricating your worn out engine parts. with that many miles on your engine the tolerances in your bearings and piston rings, etc are a lot looser, so things are gonna slap around until the oil gets a chance to lubricate and cushion things. if you do have 260,000 on the engine, its not worth working on the engine til its time to replace it, or rebuild it. just go easy on it, and possibly consider go to the parts store and get "Engine Restore" ive had some luck with it quieting down noisy old engines.
2007-03-27 03:17:11 · answer #4 · answered by Redneck 4 · 1⤊ 0⤋
Is it a clicking sound or a knocking sound? Does it feel like the engine is struggling?
If so, check your spark plugs. Could be a fuel knock problem. It is usually corrected by fixing the gaps on your spark plugs. Check your manual on spark plug gap settings. Either have a mechanic set the gap on your spark plugs to manufacturer recommended settings or you could purchase a feeler gauge and adjust them yourself.
Its a relatively simple procedure which wont take long. Your local mechanic shouldnt charge too much.
2007-03-27 14:18:20 · answer #5 · answered by Tom C 3 · 0⤊ 0⤋
No, that's not normal. Sounds like a hydraulic lifter that's gone bad, is it a overhead cam motor or a overhead valve motor?
2007-03-27 03:02:15 · answer #6 · answered by 1000 Man Embassy 5 · 0⤊ 0⤋
Is it possible that it could be the valves instead? Maybe the valve lifters bleeding down and you get the tapping until they pump up again?
2007-03-27 03:05:55 · answer #7 · answered by Fordman 7 · 0⤊ 0⤋
Ahh, the old 3.4L GM piston slap eh? Learn to ignore it, when / if it ever fails, you'll know.
2007-03-27 03:04:46 · answer #8 · answered by BFH 6 · 1⤊ 0⤋
Your wife. Keep driving.
2007-03-27 02:58:51 · answer #9 · answered by joey k 3 · 0⤊ 0⤋
get higher grade gasoline
2007-03-27 03:03:48 · answer #10 · answered by Anonymous · 0⤊ 0⤋