Bent some valves, check out my timing belt.

[RoasT BeeF]

It just ripped the teeth off right around the crank . All the other teeth are cracked and about ready to rip off too. This belt only has about 30k on it. And yeah its a mitsu belt. Oh well better luck next time right...

Pics of the belt, head, engine.

 

[BoostedTalonTS]

Damn. That sucks! -And to think that I was complaining of my TBelt letting loose only 9K early (51K on it when it went)... -30K??!! -WTF Happened??!!

...When mine went, it left me a huge mess inside the lower Timing Cover. -The majority fell out when I removed the cover but this is what mine looked like (the timing belt was ripped into several small parts, none of them were over 2-3" in length and looked like the bottom end had a few coasting RPMs to gnaw on it)...

How bad are the valves/pistons?

Good Luck, Man!!

 

[RoasT BeeF]

Looks like only the exhaust valves got it. Pistons are fine. Lucky I was only doing about 10mph and I was right in front of my house.

Looks like your BS belt went. One time my T-belt started rubbing on the inside of the upper t-belt cover and literally shredded it down to strings. I pulled off the lower cover and a pile of mesh came out. Had fun un-tangling the mess.

 

[BoostedTalonTS]

Yeah, it's hard to say what belt went first... The BS Belt was pretty much intact, while the TBelt was just shredded. Either way, I ended up with this:

-All 8 exhaust & 2 Intake looked like this without the cams installed.

The belt(s) let go at about 60 MPH on the Freeway while just leaving the wrecking yard with another fellow DSMer... That day sucked. Lucky for you it was right in front of your house. -I got stuck with a rather large tow bill

 

[RipperXX]

I just did a full T-belt job on my car, and went with ALL mitsu parts, belt all pully's tentioner etc. Except I shelled out some more cash and got a Kevlar balance shaft belt for $65 I wanted a kevlar T-belt too but price diference was like $75 or 160+


I figured I have heard of the balance shaft belt going and takeing out the T-belt so many times whats another $30 for the kevlar Balance shaft belt. I really would recomend getting one when you do your next T-belt job.

 

[RoasT BeeF]

I was just talking about getting one of those kevlar belts with a fellow dsm'r. Maybe its time to try one. I cant see a mitsu belt doing what mine did in only about 30k. Lucky for me I have no balance shafts so I dont have to worry about that issue.

 

[eclipse90gsxt]

Yous looks exactly like mine when my T belt went at around 30K also. It ripped 29 teath off of the belt. Only bent 2 valves in cylinder 4, and scored the piston a tad on the exhuast side of it.

 

[anomalyinva]

Well, when my balance shaft seized, it cracked the block, the head, took out tbelt, scored every piston, broke 2 valves, and bent like 6 others. My mess > your mess.

 

[93ESTalon]

My friend bought a 91 TSI from a guy that had the timing belt go. He was planning on fixing it up but decided that it just wasn't worth it. Luckily for me I was in the middle of my second engine rebuild and i wanted a 6 bolt engine. So i bought the whole car off of him for $500. It was a mess. It looked like a cat got sucked into the T-belt cover and the head was screwed. All 16 valves were bent, scored all 4 pistons on intake and exhaust side, broke all but 1 valve steam guide, and it managed to bend the main acc. pully? . Never could understand why such important/expensive parts are held together with cheap hardware. Oh well. Best of luck to ya man.

Tyler

 

[fate86]

where can i get one of those kevlar tbelts?

and theres only 1 belt for the timing right? i thought there was but someoen told me otherwize...

and do you have to have the head off to replace the belt?

 

[HighPsi92GST]

the head has to be on to change the belt
there is only one belt for timing, the smaller one they speak of is the balance belt

 

[dsmayhem]

where can i get one of those kevlar tbelts?

http://www.machv.com/ketibe.html

 

[fate86]

is it totally neccesery to change the balance belt?

 

[Morphius]

Two things:

1. I believe most belts are Kevlar reinforced.

2. Take note where your belt failed. The ribs. The ribs are NOT reinforced by anything. The main belt webbing is. So, if you are buying a Kevlar belt in hopes it won't fail as you've shown (and they always fail like this), you're wasting your money.

 

[Morphius]

THANKS TO GATES:


Polyester
Tensile Strength 160,000 lbs/in 2
Elongation at break 14.0%
Modulus (approx.)2,000,000 lbs/in 2

One of the main advantages of polyester cord over higher tensile cords is the lower modulusof polyester,enabling the belt to rotate smoothly over small diameter pulleys. Also,the elasticproperties of the material enable it to absorb shock and dampen vibration.In more and more equipment,stepping motors are being used.Polyester belts have proven far superior to fiberglass or Kevlar reinforced belts in these applications.
High-speed applications with small pulleys are best served by polyester belts under low load.


Kevlar
Tensile Strength 400,000 lbs/in 2
Elongation at break 2.5%
Modulus 18,000,000 lbs/in 2

High tensile trength and low elongation make this material very suitable for timing belt applications.Kevlar has excellent shock resistance and high load capacity.


Fiberglass
Tensile Strength 350,000 lbs/in 2
Elongation at break 2.5 – 3.5%%
Modulus 10,000,000 lbs/in 2

The most important advantages are:
1.High strength.
2.Low elongation or stretch.
3.Excellent dimensional stability.
4.Excellent chemical resistance.
5.Absence of creep,100%elongation recovery.
Disadvantages:
1.High modulus (difficult to bend).
2.Brittleness of glass.Improper handling or installation can cause permanent damage.
3.Poor shock resistance.No shock absorbing quality when used in timing belts.