my zed has a knocking noice,but whats miss leading is that it is only over 3000 rpm :confused:. i have had the engines oil changed twice in the past 3 months because i know how important the oil is to the zed's and it is not drove hard. can any of you guys shine a bit of light on the issue i have and point me in the right direction

cheers

my zed has a knocking noice,but whats miss leading is that it is only over 3000 rpm :confused:. i have had the engines oil changed twice in the past 3 months because i know how important the oil is to the zed's and it is not drove hard. can any of you guys shine a bit of light on the issue i have and point me in the right direction

cheers

if its a bottom end knock from the main or rod bearings then no matter how many times you change the oil it will remain knocky only cure is replacement bearings,if its a topend tap then it may well be lack of oil to the topend due to oil starvation or sticky lifter which isent un-common

 

normally the only way the bottom end will knock if it has be ran low of oil as the bearings are constantly in contact with oil during crank rotation sounds like you have run low on oil in the past and there is no return unfortunatly,once bearings ware they cant repair themselfs

 

HTH greg

if its a bottom end knock from the main or rod bearings then no matter how many times you change the oil it will remain knocky only cure is replacement bearings,if its a topend tap then it may well be lack of oil to the topend due to oil starvation or sticky lifter which isent un-common

 

normally the only way the bottom end will knock if it has be ran low of oil as the bearings are constantly in contact with oil during crank rotation sounds like you have run low on oil in the past and there is no return unfortunatly,once bearings ware they cant repair themselfs

 

HTH greg

 

thanks for the advice greg but i must say the oil has never ran low, i check it every 2 days as well as all the other levels. but if it is what you say it could be how much will it be todo the bearings? but i am hoping it is not them

thanks for the advice greg but i must say the oil has never ran low, i check it every 2 days as well as all the other levels. but if it is what you say it could be how much will it be todo the bearings? but i am hoping it is not them

 

What oil are you using. ?

sounds like big end bearing to me, does it get louder the more you rev it?

What oil are you using. ?

am using 10-40 castrol magnetec

my zed has a knocking noice,but whats miss leading is that it is only over 3000 rpm :confused:. i have had the engines oil changed twice in the past 3 months because i know how important the oil is to the zed's and it is not drove hard. can any of you guys shine a bit of light on the issue i have and point me in the right direction

cheers

is the noise half engine speed.if it is then it probaly is from the valve train.is it a rattle rather than a knock.the variable cam timing operates at 3000rpm this can make noises if the springs in the hubs go weak.to prove this on the back of each rocker cover nearest the middle of the engine is a solenoid.trace the wires that come out of them and unplug them.run the engine then see if the noise goes.if it goes you have a vtc fault.check the feeds at the plugs supplying the solenoids.the correct voltage is in the nissan manual.if the feeds are there then its time to replace the vtc springs.