Tapping Noise When Engine Is Cold..

[GTR-N1]

Good to hear it!

What brand of 10W-40 has he used?

Regards, T

[Wacky Dee]

they use an aussie made (semi-synth I think) called Hi-Tec .. he says it's as good as any of the bigger names with billion dollar advertising budgets and I'm inclined to believe it.

[Kujotk]

just bumping this up 9 months from the past but i now have the same problem, Happend this morning on my R33 gtst, it was very cold this morning and sound happend for about the first 5 mins after starting....

Question is to delta force or anyone else who solved their problem.... did the ticking sound come back when the oil got alittle older??? Mine was only changed 2k ago, had the car for a year and a half and first ive heard of the sound... only used elf semi synth but not sure on the grade of it....

[Wacky Dee]

I can still hear the lifters on a cold starts but much shorter ..only about 30 seconds or so and not so loud. Used to be a racket for about 3-4 mins before changing to thicker oil...

Just stick some 10W40 into it ..can't go wrong.

[Kujotk]

i'll see how the car goes thismorning on the cold start up,,,, maybe it was a once of, maybe all the oil was way at the bottom of the engine or something yesterday

[Wacky Dee]

resurrecting this because I've been battling this annoying fkn noise for the past year or so again...cold startups only.

Just did some research and it appears that the most likely culprit is a dodgy timing belt idler pulley bearing ... that's exactly where the noise is coming from and looking at a couple of vids on youtube eg.

- that's exactly the type of noise and the 2-3 I read through, it was fixed with an idler/tensioner bearing change.

Now just wondering whether to redo timing belt/water pump as I'm not so certain these were done or done properly at least together with the pulley bearings or just do the bearings ... Does anyone know how much the tensioner and idler bearings cost ? Would the timing belt have to come off to change the 2 bearing ? I'm assuming it would ..in which case, probably not a bad idea to do the belt and water pump too hey

[Wacky Dee]

wait ..idler pulley is just behind the cam/cas cover right ???

edit: never mind .. that'd be the exhaust cam pulley ..hm why would I get noise from this area then ?!? it sounds EXACTLY like in the youtube vids I saw where they fixed it by replacing tensioner/idler bearings but those sit much lower ..just above and below water pump ??