Check ur fan belts had an apprentice at dealership once diagnose a telstra gq as stuffed motor i thought the same when i heard it when he removed belts i seen a big crack in one so run engine without belts and knock was gone sounded like a bigend could of been an expensive stuff up lol.

 

i replaced belts bout 2 weeks ago so i dont think its that. could it be the big end?

 

Balancer tight how long has it been doing it. What about idler pulleys did u check them when doing belts.does it knock when revved or when

 

water pump or idler pulley would be cheaper. Take the belts off again. if the noise went away and came back, it's not a big end.

 

ahk no i didnt chek idler pulleys, would the water pump nock? its not heating up at all and it only nocks at idle when reving you cant hear it? what should i do to check?

 

and its been nocking like this consistantly for 3 days now, does accasionaly go away for a short period of time..

 

Not a big end then . Id be checking idler pulley bearings

 

ok thanks mate will it be hurting it driving it if it is this? and how do you check that i havet done it before

 

If it's an idler bearing, they can lock up or collapse and throw belts. Water pump bearing, can lock up, flog out, fall apart worse case. Check each pulley for movement any direction. If in doubt, get someone who knows have a feel.

 

Considering u said sometimes u cant hear it till u move steering id go straight to that pull belt off feel bearing for movement spin it and listen to it even try running it without belts see if goes away or still there

 

ok no worries ill pull the belts off tomorro and check idler pulley for movement and i did actually notice yesterday a slight bit of coolant leaking from the waterpump seal could this be the problem? if it was the waterpump could it still be stuffed if motor is not heating up?

 

Ummmmm, probably the first thing ya shoulda mentioned. i'll put ANOTHER Corona on that!

 

and ok thanks grubbies i really hope that is all it is are the bearings hard to change in the idler pulley?

 

Yep if its leaking water she ****ed , bearing poss collapsed causing seal to leak. Pump would still operate as per normal will not overheat till it gets low on water which will happen. If already leaking from pump i wouldnt recommend driving it far at all.

 

okay thanks heaps for your help fallas ill get a new waterpump and check idler pulley hopefully fixes my problems it was the slightest of leak from the waterpump i wiped it and it hasnt seemed to leak anymore but it must be stuffed if it leaked in the first place.. could i check anything on the harmonic balancer to make sure?

 

haha yeh true i just didnt think the waterpump could make a noise like that..

 

good you solved it, just in case others use this thread for reference in future heres another thing to check:

lower outer bolt on power steering pump, where it pivots when adjusting. This can wear if loose and become offset, parts of the bolt become oval allowing the pump to tilt and move around.