Outer Limits 4x4 Board

had the fan & belts off last night & thought i would check out the timing belt while i was close by.

the motors obiously rocked back when turned off last & put some slack on the drive side of timing belt......see pic's.





motor runs & pulls well, apart from typical 1hz needs more power i didnt notice anything wrong

i took off the tensioner & checked it & the belt.

all looked good & refitted well with no slack in the belt.

anyone else seen a timing belt this loose before??????????

seems a bit loose and they do stretch... for the sake of $25 i would have replaced it while you had it all apart, bloody cheap insurance really. you are supposed to check them every 40 thou (major service) so maybe yours has just been getting worse over time.


excuse my ignorance but is there a second belt from the crank to the fuel pump? or gears? becuase looking at that there is nothing joining the crank and the cam

thanks mate.

the belt has done about 50 000km & looked in very good shape.

& yes there are gears from the crank to the fuel pump.

cheers kel.

Turn the engine over in the direction of normal rotation, clockwise looking at the front of it. You will find the belt will tighten up, only reason it wont is because the tensioner has become stuck in one position.



Andy

This is normal believe it or not...when the motor stops, the crank turns back when the piston tried to compress air and doesnt make it...the spring on the tensioner takes the shock load, when you start up, it will return to normal, if you click the starter, it will aswell.
Andrew

bigcam wrote:seems a bit loose and they do stretch... for the sake of $25 i would have replaced it while you had it all apart, bloody cheap insurance really. you are supposed to check them every 40 thou (major service) so maybe yours has just been getting worse over time.

You don't have to check them every 40k, they just need to be replaced at 100k or 150k on some Toyota's.

chunks, checking the TB is a cheap insurance... u know what happens when it breaks at a speed?

if i can take 20 mins and check it every now and then i will. Sure beats a blown engine...

Z()LTAN wrote:chunks, checking the TB is a cheap insurance... u know what happens when it breaks at a speed?

if i can take 20 mins and check it every now and then i will. Sure beats a blown engine...

Yeh i know what happens when they break, ive to had pull a few heads off after a belt has snapped, but i've never seen or heard of a belt on a 1HZ breaking before it was due (in fact i know blokes who are bit slack on maintenance and have gone 30k + past the due interval before changing it). Besides all that look at the path the belt on a 1HZ has to follow, there are very few times the belt has to bend unlike some other modern engines where the belt has to bend back and forth over a maze of tenioners and idlers, all at higher rpm than a 1HZ too. At the end of the day if regulalry checking it helps you sleep at night then do it, but i wouldn't be too concerned.

i am with you chunks i dont know how many belts i have changed at the 100 thou and they are like brand new (nearly) i think checking the belt is a wast of time as long as you REPLACE THE BELT AND TENSIONER when recomended you will be fine

#########update#########


thanks for the help guys.

cleaned the idler pivot as the lube had harded.

it ran well & obviously wasnt an issue.

i just crapped myself to see the belt that loose at first

thanks again kel.