How The f**k Does This Happen (pic Inside)

[T04GTR]

hmmm. i bet it was making a nice wir wir wir wir noise yes?

the corect tension is no slack. oh eay way to check is by flapping it like you do a rubberband. if it makes a audible twang. its to tight.

if it makes a thud its just right

[Rednisr31]

hmmm. i bet it was making a nice wir wir wir wir noise yes?

the corect tension is no slack. oh eay way to check is by flapping it like you do a rubberband. if it makes a audible twang. its to tight.

if it makes a thud its just right

yes it whirred nicely

and it didnt twang when flicked when we did it

[Cubes]

hmmm. i bet it was making a nice wir wir wir wir noise yes?

the corect tension is no slack. oh eay way to check is by flapping it like you do a rubberband. if it makes a audible twang. its to tight.

if it makes a thud its just right

ahh subjective.

I setup mine with the correct tension as per the engine manual. It had slight slack but was not loose. It had tension if that makes sense.

My initial feeling was... It should be slightly tighter. But its not supposed to be 'tight'.

[T04GTR]

yeah. just basicly the spring tension on the belt. once the engine turned over

[HRthirtyone]

yea the belt should have 10mm play in/out between tensioner and gear as i recall, if it makes any noise its too tight! i have fitted a few gates belts, my new one is silent!!!

[skylinecouple]

Like me,try to move forward.If finances are ok then rip the head off and check damage.If pistons are ok then perhaps a port clean and even cams.Otherwise locate a standard head and bolt her back together.Do you feel you could rebuild it yourself if pistons are gone?

[Bl4cK32]

how about a simple compression check before he rips the head off

[Rednisr31]

considering im unemployed im not ripping it apart unless i gotta, comp test it is as B|4cK32 said

gates high performance ones HRthirtyone?

Edited February 4, 2007 by Rednisr31

[HRthirtyone]

yea dude, the blue ones, that are meant to be 3x stronger etc.

if you dont have cash to fix it straight away, park it up , and take the head off..... Dont even bother with a compression test, you should have bent valves. it wont hurt to take it apart and suss the damage.

[paulr33]

i vote smashed valves (to bits)

[Rednisr31]

should, ya never know tho i might just be lucky

my mate was smashing limiter with his rb30e and snapped a timing belt and it didn't damage it internally

[tmc_2]

should, ya never know tho i might just be lucky

my mate was smashing limiter with his rb30e and snapped a timing belt and it didn't damage it internally

I think rb30e are considered not interference engines, meaning the valves can neve rhit the pistons.

In a rb25 howver i believe ther are a interference engine so yes the valves will smash the tops of pistons.

Hope fully im wrong.

Sorry to see that happen.

[CruiseLiner]

gates timing belt is only noisy if u have it too tight and it will make a whirring noise. mine is super silent now i have it tensioned correctly, where as the last one was pretty loud as i overtightened it.

[Ryanrb25]

f*k man sorry to hear....id be pissed

oh...so that's why my last rb25det had a wierd wherrrrry noise comin from the cam belt covers.lol. real annoying

[BOOSTD]

All 24 valves will be bent, valve guilds will be cracked on at least half. pistons will be ok as long as a valve head hasn't broken off. I had the same thing, broken idler pully bolt tho..was doing 10km per hour

[crack]

the following was taken from the service manual for r33 gts25t.

"6. Adjust timing belt tension.

(1) Turn the crankshaft clockwise twice with the tensioner pulley

installation bolt in loose position.

(2) Insert wrench to tensioner pulley hexagonal hole to fix the tensioner

pulley to tighten the installation bolts.

Tightening torque (N-m{kg-m}) 43-58 {4.4-5.9}

*The timing belt tension should be at correct tension"

[FATGTS-R]

Ouch thats nasty and making me freak out a little bit.

I had a Gates belt fitted a couple thousand kms ago and it whirrs very loudly. The belt cover is off and I dont think I could get 10mm play in it.

The mech that fitted it said it will loosen up after a thousand or so kays and that the whirring noise is perfectly normal. Will I have to do the whole belt replacement procedure i.e timing etc to loosen it or can I safely just loosen it off a little bit with it all in place?

I have never done it myself before hence I dont know how the tensioner operates.

[Busky2k]

Perfect excuse to bin the RB and put a LS6 in there.

Ok j/k.

[CruiseLiner]

to adjust the tensioner u need the bottom timing cover off which means u need the fan off and radiator out and harmonic balancer off as well, so pretty much the whole lot (and top timing cover but u say its already off). its not hard to do a timing belt and i cant see how people make it out to be a difficult job. i can get the car from running to belt off and new one on and runnning again in about an hour and a half or less. ive done mine about 20 times though when we been doin the valve shim clearances for the big cams i got.

oh and no the belt doesnt actually need to be removed only the tensioner loosened abit with belt in place.

just make sure the 3 dots line up and u will have no problems for anyone attempting the belt change themselves

Edited February 4, 2007 by CruiseLiner

[Rednisr31]

I think rb30e are considered not interference engines, meaning the valves can neve rhit the pistons.

In a rb25 howver i believe ther are a interference engine so yes the valves will smash the tops of pistons.

Hope fully im wrong.

Sorry to see that happen.

rb30s are interference engines