Timing Belt Snapped Help Help Help

[otownawdtsi]

my daily driver ( a 99 gs n/t automatic with 77k on it) up and snapped the timing belt today for no good reason, im wondering, is there any way i can get by with just replacing the belt and not the head, i dotn want to pull the head UNLESS im replacing it when i do it, so can i just put a new timing belt on and try it? ive heard a ton of storys where the 2g n/ts 420as snap the timing belts without causing damage, so how do i know !!?!? thanks for your help

 

[slider85]

this doesn't help your question but i'm pretty sure you are suppose to replace the timing belt every 60k miles at most. These cars can have a tendancy to go through timing belts faster though.

 

[Bluedragondsm]

rebuild the head. my t-belt skipped a couple teeth and bam messed it up good so i got the head rebuilt and ported and polished and shaved now im running a retarded amount of compression and need premuim gas

but take the head off and check it DO NOT JUST LEAVE IT

 

[Civib2]

yeah same thing happend to me I threw my belt now all my valves are bent. On our engines its a 98% chance you bent your valves because its an interference motor. I suggest you pull the head check the damage and send it off to be ported and polished and rebuilt and inspected.

 

[elipsekid]

same thing happened to me, the belt jumped and 12 valves were shot, rebuild the head

 

[igopoopy]

do a compresion test hope you get luckey

 

[Defiant]

my daily driver ( a 99 gs n/t automatic with 77k on it) up and snapped the timing belt today for no good reason

Replace belts at 60K. So much for the good reason.

 

[Aurora-Hybrid]

last time mine snapped I also had 12 bent valvs. But when I FIRST got my car, the belt snapped and bent no valvs. (The last time it snapped is b/c my balancer belt broke and got tangled in the timming belt) More than likely you have to service the heads...but you might be lucky like me. It kinda all depends on how hard your engine was working at the time it snapped.

 

[BUCK]

So are the 2g n/ts 420a's interference Motors or not?

And I think this may be in the wrong Forum...

 

[turboed420A]

What the hell does this have to do with turbo cars???????? :thumbdown

 

[SnoopySLR]

yeah... we are interference... sucks.

 

[TimG]

do a compresion test hope you get luckey

How do you do a compression test on a car with a broken timing belt?

 

[SnoopySLR]

Turn the crank, not the cams.

 

[x camaro owner]

Turn the crank, not the cams.

great idea lets do a compression check by turning the crank and not letting the valves move to close. awesome idea this way if he doesn't have bent valves he sure as hell will after the compresion test in the interfernce motor.
to properly do a compression test on a motor with no timing you have to unbolt the cam mounts so the valves go up then you can spin that crank all you want with no worries about damageing the valves. check each cylinder and thats the test. as for porting and polishing the heads do it yourself why pay someone to do something that is so easy to do. porting is just time consuming not hard. i spent 6 hours porting my o2 housing and had a few pounds of filings on the ground. as for polsihing thats easy doesn't take long at all you can do it with a polishing tool which there is a variety of or you can use sandpaper and work your way down to a really really fine grit.

 

[91awd]

My timing belt sheared all the teeth off when I was sitting at stop light it was great . But I got lucky and didn't have to replace any valves I just threw a belt on and cranked it over everything seemed ok so I did a compression test and they were all perfect. I was lucky though my friend has been around these cars for years and this was only the second time he has seen it. So it might be worth it to just throw a new belt on and turn it over. Oh and my belt was only 11,000 miles old and their was no oil on it so I don't know why it went out. Also make sure you replace the balance shaft belt.