Rattle noise from engine

[isra]

Hi everyone...

Today is the 3rd day that my car is making rattling noises.. It comes from the head an get really bad at high idle. I dont have loss of power car pulls fine. It kind sounds like marbles under valve cover... I have a m52 single vanos obd1 cars has ran excellent for over a year..

Any help would be greatly appreciated..

[e30rapidic]

search this

sounds like marbles under valve cover...

and you'll find your answer about your VANOS

[isra]

Ok.. So before buying a new vanos i put my friends good vanos an noise was still there.. Its like a metal grinding noise around 2500k -3500k rpm... I unpluged the VANOs... an noise was gone any ideas ..

[MaxBell]

It could be your timing is off. Mine was, and the noise was caused by the vanos changing the timing even more which caused slack on the wrong side of the tensioners.

[isra]

I can hear the noise by the intake manifild side an it sounds around 4-6 cyl... car runs fine...how can i check the timing with a gun...?

[cabin]

Ok.. So before buying a new vanos i put my friends good vanos an noise was still there.. Its like a metal grinding noise around 2500k -3500k rpm... I unpluged the VANOs... an noise was gone any ideas ..

Did you swap out the whole VANOS unit, or just the solenoid? Swapping the solenoid won't change a thing with your noise.

[jrdeamicis]

Dead lifters or dying cam bearing.

[isra]

Problem fixed.. Like Maxbell said my timing was off...

I swapped my 3.25lsd for a 3.73lsd...wooooow! What a difference.. little high for a zf320 but i like it
:)

[isra]

Hi guys. I did not want start a new thread so ill post it here...so after my problem woth the timing was fixed i got a rebuilt kit for my vanos. After that was done i installed it an my car did not start so i checkthe timing everything was (A) ok... I put everything back together an car start up but i sounds like f***ing ....POPCORN.... i went back an tripple checked the timing an still car turns on but very very nasty like i said before popcorn... does anybody have ideas of what can be the problem... Im thinking of taking the.head off... To see if i have any bent valves or something..HOPE I DONT... I have a rebuilt head an spent alot of money on the rebuilt...HELP PLEASE IM GETTING FED UP WITH THIS CAR I HAVE alot of money in the car.. An if i can find problem soon... Im selling Cheap!... So please help me out thanks

[evandael]

You torque down everything in the VANOS unit correctly?

[isra]

Yes, i check everything over an over...but i dont know whats the problem. It starts it holds a very nasty idle an pops.. i dont want to think of valves.. I check all my sensors.. My connections.. All i need to do as last option is remove head, dont want to but is the last thing..