Broken plug and rocker arm
 

Last weekend I had the talon running.Fixed a few boost leaks that I had.So finally I got to go for a test drive.Here I was going down the road driving normal.As a matter of fact I was only boosting 10psi.Then I heard kinda like a backfire.Then the car just went dead.So I have attached a pic to show what happend.

Re: Broken plug and rocker arm
 

Ewwww that looks yucky.

CRAIG

Re: Broken plug and rocker arm
 

Anybody else thinking there is a broken or bent valve in that head? Hows the timing belt, did it jump time?

Re: Broken plug and rocker arm
 

Can't see image.

Re: Broken plug and rocker arm
 

Your right there is a broke valve.As a matter of fact,the head of the intake valve is still laying in the cylinder.When I checked the timing it was only one tooth off on the cam gears.That head had just been reworked.I got the machine shop to shave it,do a 3 angle valve job,I did all the polishing and porting.On a better note I found another motor I am going to buy for 600 bucks.

Re: Broken plug and rocker arm
 

Did the valve actually fall out of the head or was it just piston to valve contact that made this happen?

Re: Broken plug and rocker arm
 

I would say the piston made contact with the valve.I guess the valve was stuck open.Then the piston came up and knocked it a good one.Maybe thats why it shattered the rocker arm.The valve stem part is still in the guide.Its the valve surface thats laying in the cylinder.Maybe I can find more out about it when I take the head off.

Re: Broken plug and rocker arm
 

If your timing is only off a tooth and this happened then most definitely the valve got stuck open. That would only be caused by poor lubrication or poor assembly.

Re: Broken plug and rocker arm
 

shitty deal man sounds like you dropped some money on your rebuild. It wouldn't suprise me if the head of the valve is imbeded in the piston.

Re: Broken plug and rocker arm
 

Matt to be honest I dont know what is at fault.JET even thought maybe it could have been a lifter.(I think thats what he said)I can say that I was not running it hard or turning alot of rpms when this happend.

Re: Broken plug and rocker arm
 

Pull the head. If there are marks on the other pistons from contact with the valves, then the 1 tooth off was problably the reason.

Re: Broken plug and rocker arm
 

I took another pic of the head.You can see in this one that the stem is still in the valve guide.

Re: Broken plug and rocker arm
 

Hard to say from the pic, but it looks like the spring is still compressed quite a bit.

I would say the valve stem is bent and that's why the spring/retainer is still in place. The valve head was probably struck by the piston, bent the stem and then broke off to do the rest of the damage.

Re: Broken plug and rocker arm
 

Do any of the other followers seem loose? If so, then those valve are probably bent too.

Re: Broken plug and rocker arm
 

I went out to the car and checked the others.They all seem to be ok.

Re: Broken plug and rocker arm
 

I would either start taking that engine apart to see what's salvagable or start looking for another engine. :(