Scgreen620 Posted February 3, 2017 Report Share Posted February 3, 2017 Hello fellow members I'm a complete noob so I must ask here today I was driving my truck since I missed driving it, it was a daily. I have a newish daily now so I'm letting my truck rest... Any ways I was on my way to work drove it about 3 miles I was at a stop light, released the clutch held the brake and suddenly I heard a noise sounds like a bearing running dry ( meaning no grease) long story short though it was a throw out bearing from the tranny popped the hood open noticed that the noise was not coming from the tranny but from the front of the engine .... The engine had oil and it hasn't over heated. The noise goes away after 10 mph then comes back of when I stop I don't want to take it apart just yet .. I was wondering if this had happen to any one of you and if you can point me to the right direction I just want to know what might of gotten ruined .. Thanks for your help Quote Link to comment
flatcat19 Posted February 3, 2017 Report Share Posted February 3, 2017 Alternator? You can buy a stethoscope from Harbor Freight for a couple bucks. 1 Quote Link to comment
KoHeartsGPA Posted February 3, 2017 Report Share Posted February 3, 2017 I think it might be your water pump bearing... 1 Quote Link to comment
datsunaholic Posted February 3, 2017 Report Share Posted February 3, 2017 Alternator.... Water pump.... if it still has the smog pump, could be that, or the smog pump's idler pulley bearing. Quote Link to comment
Zephyr Posted February 3, 2017 Report Share Posted February 3, 2017 If you don't get a stethoscope like flatcat19 said I've had good luck using a long screwdriver put the handle end to your ear and other end against the spots you think the sound is coming from 1 Quote Link to comment
datzenmike Posted February 3, 2017 Report Share Posted February 3, 2017 Take the fan belt off. Start it up and see if noise is gone. Spin alternator and water pump by hand. Look for any looseness or roughness turning. 2 Quote Link to comment
flyerdan Posted February 3, 2017 Report Share Posted February 3, 2017 Check for an excessively loose belt, it's not uncommon for an alternator to squeal a bit at low speed and go away at higher rpms as centrifugal force makes the belt grip a bit better. Quote Link to comment
Scgreen620 Posted February 4, 2017 Author Report Share Posted February 4, 2017 It's not the alternator I just replaced it about two weeks ago ... I will try the screw driver on the ear thing... Maybe water pump .. Btw guys it's not a squeal sound .. It's like metal on metal action Quote Link to comment
datzenmike Posted February 4, 2017 Report Share Posted February 4, 2017 Rule number one. When something goes wrong, first thing you do is think back to the last thing you did on your vehicle. Second is... never assume that a new part can't be a bad part. In fact that's the first thing I would look at. Maybe the adjustment bolt came loose or the mounting bolt. If ok take the belt off and spin them. A bad bearing will be rough to turn. Water pump will often be wobbly. 3 Quote Link to comment
Scgreen620 Posted February 4, 2017 Author Report Share Posted February 4, 2017 Will take a look at it thanks mike Quote Link to comment
datzenmike Posted February 4, 2017 Report Share Posted February 4, 2017 It'll be something simple. Quote Link to comment
flatcat19 Posted February 4, 2017 Report Share Posted February 4, 2017 I work as a Toyota tech in a dealership. Toyota's are known for their reliability. I get brand new, not rebuilt, parts all the time that are bad out of the box. I'm with Mike. Just cuz it's "new" means nothing. 2 Quote Link to comment
Scgreen620 Posted February 4, 2017 Author Report Share Posted February 4, 2017 True ok I'll keep y'all updated tomorrow Quote Link to comment
Stoffregen Motorsports Posted February 4, 2017 Report Share Posted February 4, 2017 I've seen alternators comes with the wrong fan installed or a slight bend in the fan causing it to hit the alternator body. That's definitely a metal on metal sound. I've also seen larger fans installed that interfere with the alternator mounting brackets. Just remove the belt and see if the noise stops. If it does, then you know it's in the alt or H2O pump. Quote Link to comment
KoHeartsGPA Posted February 4, 2017 Report Share Posted February 4, 2017 Update? Quote Link to comment
Scgreen620 Posted February 5, 2017 Author Report Share Posted February 5, 2017 Its something in the engine Quote Link to comment
Scgreen620 Posted February 5, 2017 Author Report Share Posted February 5, 2017 Don't know what it is .. I'm going to take it to the guy that rebuilt it ... 1 Quote Link to comment
datzenmike Posted February 5, 2017 Report Share Posted February 5, 2017 Loose timing chain guide? Not adjusted tight enough? 1 Quote Link to comment
flatcat19 Posted February 5, 2017 Report Share Posted February 5, 2017 That's a rod...knock, knock, knocking on heaven's door. 1 Quote Link to comment
KoHeartsGPA Posted February 5, 2017 Report Share Posted February 5, 2017 Post youtube vid if you can, please, Draker had an interesting noise too and went away after he pulled it and replaced the timing chain cover. Quote Link to comment
datzenmike Posted February 5, 2017 Report Share Posted February 5, 2017 Does your oil light flicker at idle? Quote Link to comment
Stoffregen Motorsports Posted February 5, 2017 Report Share Posted February 5, 2017 And so it begins. The process of elimination is your friend when diagnosing a noise. 2 Quote Link to comment
Scgreen620 Posted February 6, 2017 Author Report Share Posted February 6, 2017 Post youtube vid if you can, please, Draker had an interesting noise too and went away after he pulled it and replaced the timing chain cover. I have a video but my camera doesn't catch the noise well it sounds like a bunch of screaming of the engine Quote Link to comment
Scgreen620 Posted February 6, 2017 Author Report Share Posted February 6, 2017 Does your oil light flicker at idle? no it does not .. I know my dummy lights work because it came on when the alternator took a dump it was flickering not the oil one but the battery one Quote Link to comment
datzenmike Posted February 6, 2017 Report Share Posted February 6, 2017 Oil and charge lights should come on when you turn your ignition key to ON. This is the test that they work every time you go to start your car. I was thinking low oil pressure. Light rod knock is pronounced when the engine is revved suddenly if in neutral but usually quiet when engine is at a steady RPM or idle. It's more noticeable under load in gear. It's like a muffled sledge hammer hitting the block in time with the engine turning. It's not a higher pitch rattle or tap. 2 Quote Link to comment
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