Power steering hum during cold start only?

[phogi]

Mga boss,

Napansin ko lately, kapag bagong start ko ng GLi, at liliko na ako from parking, umuugong yung power steering. After a while of driving, mga 2 minutes or more siguro, wala nang hum. Nangyayari lang ito kapag galing sa cold start. Anytime after, wala nang hum, kahit mag lock-to-lock turn ako na naka full stop.

What I would do is rev the engine while turning, and somehow, nawawala yung hum pag ganito (at hindi dahil nasapawan lang ng tunog ng engine). Para bang kailangan nya ng assist pag galing sa cold start. Or kailangan medyo uminit muna yung engine. I'm usually parked between two cars pa naman kaya daming kabig bago mailabas yung kotse, so gamit na gamit yung p/s habang malamig pa yung makina.


Any ideas?


Also, how do you drain/bleed the ps fluid sa '95 Corolla GLi? And what is the recommended ps fluid for this car? I've been using Shell ATF but I'm not really sure if I should be using ATF or PS fluid. Wala na yung user's manual ko.

[ghosthunter]

Sounds like your power steering fluid is low. Add some ATF into the power steering reservoir. Later have someone check if you have some sort of leak in your power steering's hydraulic system.

[phogi]

Fluid is filled up to the marker naman. I added fluid the first time I heard it since that's usually what causes it.

I might bring it to celica this saturday unless anybody can suggest a good shop in the ortigas extension area.

[woohoo]

Your belt might be not taut enough. I experienced this already. The steering became heavy when the noise manifested. I was even told by the mechanic that my power steering pump(?) needs replacing...

Then I noticed that the belt wasn't taut enough. I just tightened it and the problem went away. replacement daw... hah!

[phogi]

Did it happen exactly the same with you? Only during cold start BUT NEVER anytime after, even at full stop as long as you're engine has been running for a while?

[woohoo]

Sorry, it didn't really happen EXACTLY like that, but I think it occurred A LOT more often after cold starts.

Still, it wouldn't hurt to test for the tautness (?) of the belt. Nothing to lose by examining that... at least you can eliminate it from the list of possible problems if it's not the culprit.