Question:

My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once it warms up it goes away.  Everything seems fine with the engine otherwise… Please help…

Response:

>My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once it >warms up it goes away.  Everything seems fine with the engine otherwise… >Please help…

It sounds like either the belt, tension pulley, or a bearing/pulley on the pwr steering, A/C,etc. Try spraying some belt dressing on the belt. If it still squeaks, its probably one of the pulleys or bearings.

Response:

Sounds like it is related to the serpentine belt. I’d try a new belt. Ed – Hide quoted text — Show quoted text – > My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once it > warms up it goes away.  Everything seems fine with the engine otherwise… > Please help…

Response:

> Sounds like it is related to the serpentine belt. I’d try a new belt. > Ed > My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once it > warms up it goes away.  Everything seems fine with the engine otherwise… > Please help…

spray some belt lube on it and see what happens.. if the squeaking stops instantly, get another belt.

Response:

Regarding the cold start squeaking. I’ve experienced the exact same thing, but it comes and goes.  One month it will do it for a day or two when cold, then go away for a month.  In our case, it was not the serpentine belt.  I did the liquid soap on the serpentine belt, still the squeak.  Did the ultimate test by removing the serpentine belt entirely and started the engine for just a few seconds – still the same squeak.    If you decide to do this, ONLY do it for a second or two – the Explorer electrical system really does not like to have the engine running without the alternator (which is driven by the serp belt). The squeak appears to be coming from the top rear of the engine, behind the intake manifold.   The squeak appears to be cyclic, synchronized with the engine RPM.  More specifically, at 900 RPM (normal idle) the cyclic appears to be 450 "squeaks" a minute, which would be half crankshaft speed (and in fact, is the spark plug and fuel injector firing frequency). I determined this rate using a stopwatch and some clever counting/multiplying.  I verified it by using one of those engine stethoscopes listening to one (or any actually) of the fuel injectors, which have a well defined tic-tic-tic-tic-tic sound.  The squeak was right in line with the frequency of the injectors (although each was slightly out of phase of course, depending on injector). I wondered if it might be an internal engine bearing or camshaft bearing/lifter squeak.  However all that is bathed in oil.  Plus, the engine stethoscope revealed nothing when touched to the engine block in several places except for the normal purring you’d hear. I crawled underneath, and I could hear it.  It’s hard to locate, but it also seemed though the squeak may have been coming from somewhere between the oilpan and the torque convertor.  Possible oil pump squeaking?  Hard to imagine though, since it’s bathed in – you guessed it – oil. As with the previous poster, my squeak ALWAYS goes away after 5-10 min of driving and the engine warms up.  Possible rubbing or cyclic vibration of metal parts external to the engine, like maybe a manifold rubbing against some other metallic member?  It’s a well-defined metallic squeak or chirp, as opposed to a duller muffled squeak you might expect if it were coming from withing the engine block itself, or as opposed to a rubber-on-rubber or plastic parts squeak (which are also duller). It happens whether the truck’s in drive or neut. Are there any baffles or air valves (throttle plate, IAC valve maybe) that could be "fluttering" back and forth causing a squeak? I can’t think of any moving parts behind the engine itself.   Only other culprit could be rear main bearing, or more likely, the bearing seal squeaking?  There is no oil leakage or seepage.   Again though, the main bearings are also supplied with plenty of oil. Any clues welcome. Mike It’s also

– Hide quoted text — Show quoted text -> My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once it > warms up it goes away.  Everything seems fine with the engine otherwise… > Please help…

Response:

I had a similar problem with my 97 sport. I took off the IAC and cleaned the inside with some carb cleaner. It changed the "tone" of the squeak, so I replaced the IAC and all was well. Hope this helps. — Dave Clark 4.0L OHV 97 Explorer Sport K&N FIPK Custom Cat back Exhaust Monroe reflex shocks

– Hide quoted text — Show quoted text -> Regarding the cold start squeaking. > I’ve experienced the exact same thing, but it comes and goes.  One month it > will do it for a day or two when cold, then go away for a month.  In our > case, it was not the serpentine belt.  I did the liquid soap on the > serpentine belt, still the squeak.  Did the ultimate test by removing the > serpentine belt entirely and started the engine for just a few seconds – > still the same squeak.    If you decide to do this, ONLY do it for a second > or two – the Explorer electrical system really does not like to have the > engine running without the alternator (which is driven by the serp belt). > The squeak appears to be coming from the top rear of the engine, behind the > intake manifold.   The squeak appears to be cyclic, synchronized with the > engine RPM.  More specifically, at 900 RPM (normal idle) the cyclic appears > to be 450 "squeaks" a minute, which would be half crankshaft speed (and in > fact, is the spark plug and fuel injector firing frequency). > I determined this rate using a stopwatch and some clever > counting/multiplying.  I verified it by using one of those engine > stethoscopes listening to one (or any actually) of the fuel injectors, which > have a well defined tic-tic-tic-tic-tic sound.  The squeak was right in line > with the frequency of the injectors (although each was slightly out of phase > of course, depending on injector). > I wondered if it might be an internal engine bearing or camshaft > bearing/lifter squeak.  However all that is bathed in oil.  Plus, the engine > stethoscope revealed nothing when touched to the engine block in several > places except for the normal purring you’d hear. > I crawled underneath, and I could hear it.  It’s hard to locate, but it also > seemed though the squeak may have been coming from somewhere between the > oilpan and the torque convertor.  Possible oil pump squeaking?  Hard to > imagine though, since it’s bathed in – you guessed it – oil. > As with the previous poster, my squeak ALWAYS goes away after 5-10 min of > driving and the engine warms up.  Possible rubbing or cyclic vibration of > metal parts external to the engine, like maybe a manifold rubbing against > some other metallic member?  It’s a well-defined metallic squeak or chirp, > as opposed to a duller muffled squeak you might expect if it were coming > from withing the engine block itself, or as opposed to a rubber-on-rubber or > plastic parts squeak (which are also duller). > It happens whether the truck’s in drive or neut. > Are there any baffles or air valves (throttle plate, IAC valve maybe) that > could be "fluttering" back and forth causing a squeak? > I can’t think of any moving parts behind the engine itself.   Only other > culprit could be rear main bearing, or more likely, the bearing seal > squeaking?  There is no oil leakage or seepage.   Again though, the main > bearings are also supplied with plenty of oil. > Any clues welcome. > Mike > It’s also > My 1995 Explorer XLT engine squeak or chirps when I start it cold.  Once > it > warms up it goes away.  Everything seems fine with the engine otherwise… > Please help…

Response: