HELP. Strange noise from engine bay when hot

[simond001]

Chaps,

Apologies for this, but girlfriends car is making a funny noise. When the car is warmed up (10 - 15 miles or so)there is a strange noise coming from the engine bay. It is reminiscent of a brake master cylinder that has no fluid in it. Almost a squeeling sound.

Any ideas would be most welcome, i have checked the fluid level in the brake filler (thingy), and also the PAS filler. any other ideas.

The car in a 1998 Pug 206 1.0.

Any help would be very much appreciated.

Simond

[nel]

It's not a squealing dizzy is it? A drop of oil on the drive stem would then solve the problem.

[tuttle]

Have you checked the belts? They can squeal like b***ers when worn/loose.

[greenv8s]

Fan belt sort of noise?

[simond001]

it isnt a belt sound. I'll try the dizzy later. It isnt a squeel like a belt, more like its scavenging for fluids.

[tuttle]

Prob fish then.............sorry

[simond001]

ok, update.

Started car last night. got engine hot and no noise. Fan didnt come on even though water was steaming.

Q. what makes the fan come on. could the noise be the fan struggling. I heard a rumour that the fan is operaterd by a copper ring heating up and working like a clutch. is this right, could this be the cause?

[Nighthawk]

without being familiar with that engine, i'd have imagined the cooling fan to be of the electric motor variety.

temp sensor in the water sends signal to relay, relay closes and powers up the fan motor. once the temp has dropped enough (usually about 10degrees C) the fan goes off.

find the sensor and bridge the terminals, with the ignition on, it should run.

however, if the fan spins freely with a flick of the finger (ignition OFF) it's very unlikely to be a sticking/tight fan motor.

One thing to look for with squelching noises is the crank case ventilation system,even more so once the engine is hot. some engines use a spring loaded diaphram in the cap. when the crankcase pressure builds up enough to overcome the light spring,it vents into the inlet air stream with a sort of "fart/squelch" noise.