How Long Has Your Stock Timing Belt Lasted

[Ten Four]

^ Same boat, I chose Gates, mainly cause it said it was stronger..

[benl1981]

skyline1999

If there was no play in the bearings and they spun ok with no real noise or notchiness then they should be fine.

A lot of mechanics and other cars recommend those bearings be replaced at 200k kms interval.

At 100k I did the tensioner and idler since I got them at a good price. The water pump seemed fine, no play, no weeps from the weep hole so I took the risk. 170k km no issue but it isn't a bad idea to do it all at the same time.

[MBS206]

I thought the RB25 was a non interference motor, ie, snap a belt, no issues except for motor stoppping...

I've had my pistons at TDC before whilst changing heads etc, and spun the cams a full 180degrees each, and they don't hit...

Explain how you guys smash valves? Or is teh RB20 an interference motor?

[Moodles2]

I've been told that Nissan engines that have automatic gearboxes mated to them, don't suffer from the valves smashing into the piston when the belt snaps or jumps some teeth, can't remember the explanation though.

[JustinP]

I replaced my belt the other day, along with the idler and tensioner. Car had done 100,200km's. I got a Dayco timing belt kit which included everything just mentioned, plus cam and crank seals, however i didnt fit these.

I didnt replace my water pump at the same time, i hope that holds up!

[R31Nismoid]

I've been told that Nissan engines that have automatic gearboxes mated to them, don't suffer from the valves smashing into the piston when the belt snaps or jumps some teeth, can't remember the explanation though.

Well i can tell you that is a load of shit

The RB20 i had was behind an auto

I can't see what transmission has to do with it anyway.

Either way, tensioner snapped - minced the valves, its common knowledge that's what happens.

So NO - you should change them @ 100k, im pretty certain Nissan advise this as well

[boostn0199]

so can anyone confirm if the rb25 is interfence or non interference motor

[grigor]

I thought the RB25 was a non interference motor.

I've had my pistons at TDC before whilst changing heads etc, and spun the cams a full 180degrees each, and they don't hit...

Mate, have no idea what you did but at TDC if you rotate you cams 360degrees, valves will hit.

NEVER do cam work with the crank at TDC.

[boostn0199]

How could you possibly know without taking them apart?

as the guy said above they seemed to have no play in the bearings and span with not much noise , and I did take them off just didnt replace them

[R31Nismoid]

as the guy said above they seemed to have no play in the bearings and span with not much noise , and I did take them off just didnt replace them

Doesn't mean a thing I'm afraid

Just because they don't make noise and/or have play does not mean it wont develop well before 200,000.

And if it suddenly just lets go (as they do), you'll find out just how wrong such an assumption would be

[Psymon]

I have been lucky twice now! I'm about to do my 2nd timing belt in 20 000k. Did the first one a few years ago at 130k because the idler siezed. I didn't know what the previous owner had done so i replaced belt, idler and tensioner. Now the tensioner has gone again so it's all being replaced again. No damage either time!

[dori34]

changed my belt last weekend to gates hi performance one, lucky i did as the oem belt had fine cracks on it and would only last another 10thou km if it was lucky.

[boostn0199]

mines been in for 35000 if i take it off to change the idler and tensioner pulleys do i need to replace the belt or can i reuse the same one

[666DAN]

My last R34 belt lasted 160,000kms.....then was stolen, so no idea what it's up to now? My Corolla Twincam got to 360,000kms only replaced it while I did the head gasket.

[DRD-00F]

My standard belt is coming up to or has passed 130 000kms. Pretty sure it's around that.

Next time it's started for more then 30 seconds it will be driving to the mechs and will have the timeing belt replaced, among other things.

To be honest, I remember looking at the timing belt ages ago and it looked like shit... although, that could have been the ac belt, as the bearing in the tensioner for that seized, twice, and minced the belt...

[illusiVe]

i was in the area (waterpump swap) so i did mine at the time, just easier to do it when u got all the crap outta the way.