Hows this happens with only 36k miles?

[loner666]

motor was put in 4 months ago..all new gaskets and a new timing chain..so i have no idea..going to pull the timing cover later this week and see if anything strange is going in there..cam is fine

Rear Head

Front Head

All 6 pistons have this little knick (wasnt there 4 months ago)

Cyl 2 exhaust pushrod

[bszopi]

How much lift on the cam? Cause that little knick sure looks like a valve is hitting.

Far right exh. valve in the 2nd pic looks like it has a knick on the outside edge as well.

[sil]

wierd, looks like the timing chain jumped or somthing
also looks very oily for 36k

did it just all the sudden go bad and you couldnt start it again?

[86euro]

Am I seeing things, or are all the exhaust valves bent?

[3100 MPFI]

I have knicks like thoes on my pistons. Happened when the pistons went up, and the valves went down.

I had to replace both heads, and reset the timing.

[loner666]

everything engine wise is stock other then LS6 valve springs..they may look oilly from the way i had them sitting and from removing them and since it hasnt ran in a month..i havent cleaned them since i installed the engine..all the exhaust valves may be bent..i know atleast 3 are noticeable..not to worried about the heads..i have new ones sitting here waiting already

car was running fine..left a light being easy and thats when it went..no power at all..ran but not willingly and sounded like shit for the few seconds i could get it to run..now i know why..lol..im gonna check the chain later this week and see what i find

[3400-95-Modified]

As I replied on the bstuff board if you find that the chain jumped a tooth, my jaw will drop... I'm unsure on how something this tight could jump a tooth...



I'll share this with this crowd, but in my opinion I think he broke the cam timing tooth off...

Is that possible if the cam bolt isnt tight enough?

this is the tooth I mean. better known as a dowel/pin I guess...

[1988GTU]

I suspect that center guide to be broken allowing massive chain sloppage which could allow timing to jump a tooth or two.

[loner666]

if i rememeber right i torqued the bolt to what it says here on the site..also that guide wasnt broken 4 months but who knows now

[Superdave]

if the chain stretched it's pretty easy to jump a tooth or 2.. It's possible that the crank key broke... seen that a few times.


If that pin broke off on the cam the car wouldn't run at all.. even at 100+ lbs of torque on the cam bolt the sprocket would still rotate pretty easy w/o the pin.


Scary stuff.. in for more carnage pics...

[3400-95-Modified]

Carnage FTW!!!

HAHA just kidding.

[Rhedalert]

subscribing

[loner666]

lol..ill have more picture this weekend when i have time agian to work on the car..i dont have the time to do it between work and school during the week right now..damn finals

[1988GTU]

email notifications... on.

[loner666]

Got the cover off need a new cam..the little pin broke off..ill get pics when i get my camera back tomorrow