Cam-belt snapped

[leonpr81]

Hi all,

After a little advise, the cambelt snapped on my '03 Leon Cupra a week ago. I the vane hope that no valves / pistons or cams were damaged I have changed the cam belt with the time at TDC. The cam belt was easier than imagined after reading so much about it being a pain in the butt.

Anyway, when I turn the key with engine rotates with out any problems but it will not fire, I have checked the timing and rotated the cam 360 degrees just in case it was out (the whole half engine speed thing) even though I was fairly confident on the timing the first time around. This did not work so I went back and timed the engine up to original state again (you never know). Still no life.

So is there any safety cut off or anything that I could of missed. The fuel pump does fire up when I open the door and switch the ignition on so I guess it is not a fueling issue. Just wondering if there could be anything else?

Or should I just assume there is plenty of broken stuff and swap the engine?

 

[Gaz7]

Bent valves, no compression, no life. My cambelt snapped at idle, and I bent over 10 valves.

 

[leonpr81]

Bent valves, no compression, no life. My cambelt snapped at idle, and I bent over 10 valves.

Was there any valve guide damaged or was it just new valves?

 

[Gaz7]

Valve guides all replaced as caution. And thus no particularly thorough inspection was made of the old ones.

 

[DrewCole]

Did it go when you were driving?

 

[Gaz7]

If you rebuild, please, as a word of warning, DO NOT use gsf supplied valves manufactured by BGA . They're total ****.

 

[leonpr81]

Did it go when you were driving?

I was plodding along at 40MPH

 

[leonpr81]

If you rebuild, please, as a word of warning, DO NOT use gsf supplied valves manufactured by BGA . They're total ****.

Thanks for the advice

I have had a quote for replacing guides at £4.80 each, seating valves at £3.60 each (which I may do) and the valves will be £10 - £15 a piece.

As and when I get around to doing the rebuild I may as well replace all the exhaust guides as they seem to show signs of wear on anything above 100k and my Cupra is about to hit 160k

 

[Cuprakev]

Have you removed the head to check for damage ? My cambelt snapped i got a new head then when i removed old head there was no damage to the valves or head i could see 2 small marks on piston no 4 i took the head to be rebuilt skimmed etc which they comfirmed there was no damage lucky i no

 

[Cuprakev]

Did you look in the flywheel port for the line on the flywheel when you timed it up ? And piston no 1 (cam belt end ) should be at top of its strock at tdc and when u timed up did you rotate the crank by hand to check for compression ?

 

[s1 evoloution]

have you put a compression tester on the engine then turned it over to see if there is even compression on all cylinders if all 4 are in the 170psi its all even if you got a drop of more than 10 psi on any cylinder that will cause uneven idle. try taking out a spark plug connect it to a coil get it held with something you can,t get a electric shock get some one to turn the key while you watch the spark plug for sparking if not theres no power going to your coils you could have a loose connector to one or all of your coils.if not the live from the engine bay loom has break in the insulation.

 

[lcrsammy]

+1 for compression test

 

[Rich-I-Am]

Is it the pd engine?
I replaced my cambelt (it didnt snap) and it wouldnt start for love nor money. Id replaced the cam sensor a few months earlier. Checked and re checked everything.
Turns out the new sensor had gone down. Try disconnecting it and then spin the engine over. If it starts after about 5 seconds of cranking it maybe just that. Stranger things have happened.

Rich