joecar

Can you post a pic of the retainer plate viewed from the other side of it...

Gunslinger09

Have you pulled the heads yet?

snyousef

iTrader: (11)

Interesting thread....I just purchased a LS1 out of an 04 GTO and picked up the LS2 timing kit from Yank that I was planning on installing (gears and chain) when I do my cam install....I thought there wasn't issue with installing the LS2 gears and chain on an LS1?

I would like to see the outcome and what actually caused this as I have found that plenty are running the LS2 timing kit (gears and chain) on the LS1 motor...

supergt99

iTrader: (1)

Looks like install error

clarke2828

Lets see the heads off with the bent valves and dents in the tops of pistons to confirm incorrect install

trevmust

there is such thing as a cam degree tool right? Or am I smoking crack while I sleep lol.

bp m1009

iTrader: (2)

i wont be able to until thanksgiving probly. im a full time student and i can only work on the car when i go home, so i dont have access until then.

mchicia1

iTrader: (5)

Incorrect install. You had too long pushrods or you installed the cam off a tooth. Chains just don't break cranking a car over unless it has pressure on it.

bp m1009

iTrader: (2)

everyone whos saying that it was an install error,it could have been, but it wasnt the cam timing being off, i turned the motor over by hand before initial startup to check for PTV clearance, there was none. what did cause the PTV contact that obviously happened as noted by the bent/broken pushrods, was the chain that snapped. Of course when the chain snaps, bad things are gonna happen, pistons will contact valves. I think some of you are missing the point here, even if i had the cam timing 90 degrees off i woulda just bent/broke some pushrods and valves. it wouldnt of shattered the retainer plate and caused binding with the gear, that is what we are trying to figure out.

bp m1009

iTrader: (2)

it didnt break when cranking, i know i said that, the truth is idk when it snaped really, i just knew something was wrong when it was cranking. it did run for a few seconds at a time, then i think the chain broke on its last short run period cause PTV contact...

badazz81z28

iTrader: (6)

Something is missing here. The more I think about this, I feel the tolerance for the cam retaining plate being sandwiched between the gear and the cam is broke it. But it doesn't make send how the chain broke. The chain is pretty tough and if you can rotate it by hand, the resistance couldn't have been that much to break the chain. My money would be on the plate breaking first allowing the cam to "walk" out thus putting the chain angle off to cause a bind and break it....Then the timing is off, and real damage occurs.

I think this all started from either of the faces (Cam / Gear) being out of tolerance.

bp m1009

iTrader: (2)

Exactly, this is what i was thinking too. Honestly if i have bent valves, im just gonna buy some different heads and put em on. I dont really care if theres some liitle nicks in the pistons it should be fine. and if it does take a ****, ill put a 6.0 in it, i can get one for around $500 complete

joecar

Was the cam retainer plate the old style or new style (countersunk bolt holes)...?

supergt99

iTrader: (1)

Not sure if the cam timing was off a tooth. But somthing is definitely not right with that cam plate. After lining up the dots and rollIng it by hand was it smooth? Cam timing would not have destroyed the cam plate.

Che70velle

iTrader: (6)

Referring to the picture on page 2, of the cam retainer plate. The side we are looking at, did you install it toward the camshaft, or toward the timing cover?

David Q

It's missing the thrust washer/bearing. The cam gear got in a bind and broke the chain.

badazz81z28

iTrader: (6)

Stock chains do not having a Torrington bearing

bp m1009

iTrader: (2)

Am i supposed to have that? ive never seen that before.

bp m1009

iTrader: (2)

old style (non countersunk holes)

bp m1009

iTrader: (2)

the seal side of retainer on p2 was facing the block side