[tomostrash]

YouTube - tomostrash's Channel Hi all i have a mazda 6 2.3 sport 2006 one lady owner,but there is a rattle coming from the cam area it sounds like a bag of spanners i have put a video on youtube please look and help me i think its the vvt.tomostrash

 

[MrTea]

i'm not great at sounds, especially when i can't be there in person.

it does sound like the valvetrain, but the VVT actuator has nothing to do with anything like that. even if the actuator stopped working, it would sound the same as it would just not rotate the cams accordingly any longer. the pin/oil assembly within the actuator i can't imagine would ever get that loud.

how does the car drive, if at all? i would do a leakdown test as my thought is a valve, but again, i'm not good with troubleshooting sounds, but figured i'd toss in my two cents.

 

[tomostrash]

I took the cam cover of and the cams are all looking as new and the engine runs fine i am 99% sure its the vvt but its an expensive try.

 

[tomostrash]

I found the problem no1 big end shells had spun in the cap allowing the piston to touch the valves,i will try a new set of shells and if no good it looks like a crank grind.

 

[tomostrash]

Now i have a problem after a complete strip down there is a rattle from the cams at 3000rpm sounds like the valves are kissing the pstons but the cams to crank are timed up ok do i need to retard the vvt some how.please help if you can to [email protected] regards Dean

 

[tomostrash]

cam rattle

i'm not great at sounds, especially when i can't be there in person.

it does sound like the valvetrain, but the VVT actuator has nothing to do with anything like that. even if the actuator stopped working, it would sound the same as it would just not rotate the cams accordingly any longer. the pin/oil assembly within the actuator i can't imagine would ever get that loud.

how does the car drive, if at all? i would do a leakdown test as my thought is a valve, but again, i'm not good with troubleshooting sounds, but figured i'd toss in my two cents.

Hi thanks for your reply but now i have a problem after a complete strip down with a new crank and rod there now is a rattle from the cams at 3000rpm sounds like the valves are kissing the pstons but the cams to crank are timed up ok do i need to retard the vvt some how.please help if you can to [email protected] regards Dean

 

[tomostrash]

vvt problem

I have investigated further today as i have been suspecting the vvt unit so i have done a quick bodge,

I took the end off the vvt and cut some rubber to pack out the veins in the actuator so it can't work once out of its locked state and the noise has gone indicating oil starvation,

I have also checked that the oil pressure valve works by applying 12volts and thats fine,

one worry it that when ordering the head gasket for a Mazda 2.3 they sent one for a mondeo 2.0 but looked the same bore size.

The vvt unit is a £700 try and its an expensive if there is no oil to unit.but why no oil???

 

[tomostrash]

I have sorted it,it was the wrong head gasket i was given one from a 2.0l mondeo but over 2005 Mazda have changed the routing of the oil feed to the vvt and it goes through the head gasket not through the chain cover.now that took some findin ill tell ye