04 G35 Sedan: Engine knocking/clicking problems...help?
#1
04 G35 Sedan: Engine knocking/clicking problems...help?
my bro bought a sedan with 77k on it in early 07' and he handed it down to me about 8 months ago and its now at 95k
its been clicking from the engine for about a year but no one could seem to help, not even the dealer
they said its something with the moisture in the pistons and when i researched i found it could also be somethin with the oil pressure? I've been putting Lucas fuel injection cleaner for about 6 months but its not helpingg =[
its pretty loud, it makes a clicking sound from about 5 ft away but if you listen closely it makes a knocking sound towards the left side of the engine at the bottom. It clicks constantly and it clicks quicker when the RPM increases. It still runs smoothly and doesnt cause any problems but i want to fix it! so i can get to the mods for my car
help please, thanks
its been clicking from the engine for about a year but no one could seem to help, not even the dealer
they said its something with the moisture in the pistons and when i researched i found it could also be somethin with the oil pressure? I've been putting Lucas fuel injection cleaner for about 6 months but its not helpingg =[
its pretty loud, it makes a clicking sound from about 5 ft away but if you listen closely it makes a knocking sound towards the left side of the engine at the bottom. It clicks constantly and it clicks quicker when the RPM increases. It still runs smoothly and doesnt cause any problems but i want to fix it! so i can get to the mods for my car
help please, thanks
#5
We need more details. The ticking... is it a ticking or pinging sound? The knocking, is it a quiet knock or a louder clunk sound or even a banging one? This sound often occurs as a result from running the engine without oil or with poor lubrication/low oil pressure. Not sure this is it since words are tough to decipher: but, once this sound is heard there is more to consider, like worn bearings/failed rod bearing, even a broken engine mount will make this sound.
The knocking sound from a failing rod bearing will usually change rather quickly as engine RPM is raised and lowered from idle to just above idle, and in some cases, the knocking sound can be made to disappear completely by RPM changes.
As the failure progresses, however, the sound will get much worse and eventually be very constant. The only cure for failed rod bearings is to remove the engine for a major overhaul.
But, it's a hard diagnosis w/o more info. Take a stehoscope (buy a cheap one) and see if you can isolate the location and give us more info. Good Luck!
The knocking sound from a failing rod bearing will usually change rather quickly as engine RPM is raised and lowered from idle to just above idle, and in some cases, the knocking sound can be made to disappear completely by RPM changes.
As the failure progresses, however, the sound will get much worse and eventually be very constant. The only cure for failed rod bearings is to remove the engine for a major overhaul.
But, it's a hard diagnosis w/o more info. Take a stehoscope (buy a cheap one) and see if you can isolate the location and give us more info. Good Luck!
#7
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#9
it's just a constant ping/ knock at idle and is like synchronized with the RPM, the car runs perfectly fine its just the sound is irritating and worries me. The dealer said same thing as yall like rod bearings and oil pressure and they also said it could be because the previous owner didnt stay updated with oil changes.
but ill start using premium, i havent because gas prices obviously. I'll see if it'll have an impact over some time and ill let yall kno thanks guys!
but ill start using premium, i havent because gas prices obviously. I'll see if it'll have an impact over some time and ill let yall kno thanks guys!
#10
I seriously doubt it's octane pinging from your description, and to wait it out some more could result in your engine freezing up. I always assume the worst case scenario and work backwards- you're going in the opposite direction, which could be a costly mistake. A long screwdriver for checking is good-- as is a cheap stethoscope (I use this b/c it's more precise) you can get for <$10.
I'd take it back ASAP or get a 2nd opinion and not drive it much until then. It seems you may have your answer, but that you might not want to face up to it b/c of the cost. It'll be much more expensive if the dealer is right and you wait longer.
I'd take it back ASAP or get a 2nd opinion and not drive it much until then. It seems you may have your answer, but that you might not want to face up to it b/c of the cost. It'll be much more expensive if the dealer is right and you wait longer.
#11
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G35 sedan w/ too much money in mods
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