what *sounds* like a belt squeal
02-29-2008, 12:00 PM
#22
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fans - you guys arent listening lol, i have no clutch fan. at all. i run 2 perma cool 12" pusher fans, controlled by ME on my painless switch panel. so they are OFF when this sound happens sometimes.
water pump - good call. i did not replace it when i did my swap because i was scared of the staggering cost, but looks like i might have to. anyone make a higher flow one? ive never had any cooling issues with this thing on track but it never hurts haha.
im going to be working on the car all day prepping it for a 3 day event next weekend, so ill give some stuff a shot and report back.
thanks everyone
water pump - good call. i did not replace it when i did my swap because i was scared of the staggering cost, but looks like i might have to. anyone make a higher flow one? ive never had any cooling issues with this thing on track but it never hurts haha.
im going to be working on the car all day prepping it for a 3 day event next weekend, so ill give some stuff a shot and report back.
thanks everyone
02-29-2008, 11:23 PM
#23
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I still vote for a fan or possibly water pump / thermostat. You mention that it's temperature related, and when you turn off the car it continues for a few seconds, well the fans will freewheel down after the power is turned off and could make that sound. As for the water pump / thermostat. After you turn off the motor, you still have water movement through the pump and housing since there isn't anything to technically stop the flow of water. So after you shut off the motor and water pump, the water will still circulate for a few seconds. The impellor on the water pump should free wheel, so that might be where it's coming from.
03-01-2008, 06:51 AM
#24
I haven't actually pulled a water pump to check, but it just makes sense to me from a inertia standpoint. If the impeller and housing were connected, I think it would be rough on the pump when you go higher rpms for a sustained time then go back down to idle. That flow of water is going to be pushing hard against the impeller. To correlate it to a bike, that would be like a spinning bike where the peddles are locked to every rotation of the crank.
03-01-2008, 10:00 AM
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i thought water pump shafts were directly linked to the pulley and impeller, with no way of free wheeling. i have changed many but never paid much attention.
03-04-2008, 05:24 PM
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ive been sick for the past few days, and last night i had an idea about this in a nyquil induced haze.
i have redone my PCV system and apparently am sucking air from my crankcase. i dont know whats causing the squealing noise. but as soon as i pull the dipstick the noise stops. put it back in, 3 or 4 seconds later, starts squealing.
needless to say my PCV system is now venting to atmosphere with a filter on it.
i have redone my PCV system and apparently am sucking air from my crankcase. i dont know whats causing the squealing noise. but as soon as i pull the dipstick the noise stops. put it back in, 3 or 4 seconds later, starts squealing.
needless to say my PCV system is now venting to atmosphere with a filter on it.
Last edited by Kamin; 03-05-2008 at 01:26 AM.
