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View Full Version : Broken plug and rocker arm

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nathan
01-14-2005, 07:41 PM
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.
TheBlizzard
01-14-2005, 11:53 PM
Ewwww that looks yucky.

CRAIG
1ViciousGSX
01-15-2005, 12:34 AM
Anybody else thinking there is a broken or bent valve in that head? Hows the timing belt, did it jump time?
red7mgte
01-15-2005, 02:37 AM
Can't see image.
nathan
01-15-2005, 07:15 AM
Anybody else thinking there is a broken or bent valve in that head? Hows the timing belt, did it jump time?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.
Matt D.
01-15-2005, 10:04 AM
Did the valve actually fall out of the head or was it just piston to valve contact that made this happen?
nathan
01-15-2005, 10:41 AM
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.
Matt D.
01-15-2005, 11:41 AM
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.
dsm95gsxer
01-15-2005, 11:56 AM
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.
nathan
01-15-2005, 12:34 PM
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.