R33 Series 2 Gts-T Start Up Knocking Sound

[HEAPHO]

Hey Everyone,

Just recently my GTS-T started making a knock sound as you start it up cold just serviced it and the oil level is where it should be. It only make the sound probably 2 out of 5 start ups could it be a coil pack getting tired ? any help would be much appreciated Ive got it booked in to get looked at on the 5th but im trying to sort it out asap

cheers

Tom

[defari]

could be just sticky lifters.. does the car shake noticebly when starting?

[jrm]

Perhaps you've used the wrong grade of oil? What did you use?

[scotty nm35]

Did you change oil filter brands? I used Drift filters a couple of times and found the anti drain valves leaked overnight.

[T.D]

I had a similar problem to you a while ago but as it weird as it sounds, it turned out to be one of the pipes from the 'cooler that was a bit loose and was rubbing against something during startup.

We found this out by letting it to roll to a stop whilst in gear so that it shudders (I know, bad for the car) to the point of stalling and voila, the knocking noise appeared due to the vibrations. Maybe give that a go?

[jrm]

Did you change oil filter brands? I used Drift filters a couple of times and found the anti drain valves leaked overnight.

I had the exact thing with the drift filter I used - won't ever use one of those again.