Area47

you can send me money to get the truck running.

JapEatr

iTrader: (9)

That sucks man

06blackg85ss

iTrader: (1)

lol If I had it I would, just lost a bunch of money on the new motor and I still need a rear for the trans am, but will be out on the stock one til it grenades lol

06blackg85ss

iTrader: (1)

yes, yes it does
curse of the built motor strikes again lol
least the last one made it a few weeks til I got boost hungry, this one didn't even start.

G85 SS

Dammit. I was hoping for some good news. I'm going to guess dropped valve too like already posted.

Only reason I don't think its folded rings is because it would be odd to see that in two cylinders like that. But then again, I'm sure it's happened somewhere before.

This makes me sad.

TStone

iTrader: (2)

Ouch. I'm gonna say jumped time (or wasn't in time to begin with) and dropped a valve in cylinder 4, and then cylinder 2 was next in line and it dropped, and then it said f this

06blackg85ss

iTrader: (1)

I'm guessing valve train related since it's 2 paired cylinders.
I've built a bunch of these heads and timed these motors way more times then I can count. Timing was definitely spot on when we put it in the car. I am kinda interested to see what happened but so fed up with the car especially with the whole interior being ruined. You would never guess the car had almost 200 k miles on it if you saw the inside
Ugh maybe all out race car for this thing in the near future. But for now it's probably going to be hihiding under a tarp for the for sea be future

TStone

iTrader: (2)

With it being 2 & 4, Id say it's more than likely valve train. Maybe something not set up right.

& everyone makes mistakes!

06blackg85ss

iTrader: (1)

Sounded fine cranking until the back fire then it sounded as if it had no compression. And it didnt

TStone

iTrader: (2)

Jump time. Backfire. Drop valve. All happens so fast
Shoulda done a leakdown. Or at least pulled the valve cover

lsjion

I'd be surprised if it were out of time, when cranking. The backfiring is suspicious though, unless it backfired through the slightly bent valves. Albeit possible, with heads that I've purchased and or fixed, when they bend valves, it's generally on all 8 intake. considering it had pretty good compression on the other 2.
The fact that it backfired is also odd. I'd check to see how the chain looks and go from there.
I assume it's in the head/ timing chain related. I'd bet the bottom end is fine

06blackg85ss

iTrader: (1)

Didn't touch it yet cause I have another car I'm trying to finish first but yes I'm pulling the valve cover this weekend and pending what I see might do a leakdown. But there is zero pressure built so I have a feeling something is fucked and will probably just pull the head when I have time.
But first things first I'm getting the trans am running

06blackg85ss

iTrader: (1)

It was definitely timed correctly not exactly rocket science with these motors. Done it many times.
I'm leaning towards the chain maybe jumping.
When it backfired it was more violent then I've heard these things do before. Worse then if your cam sensor is off.

armcclure

iTrader: (2)

It's not a ******* big block. If you want oil pressure start the bitch.

Timing had to have either been off or jumped.

Sad day.

06blackg85ss

iTrader: (1)

Bottom end had been sitting a while. Wanted to get the oil flowing before it ran..... but it didn't matter lol.

ssyellow

****, I was happy to see your name on the boards posting again then this happened. Best of luck, looking forward to the f-body build.

06blackg85ss

iTrader: (1)

It'll be fixed one of these days need to get the other car done first as I've been building it for over 3 yrs now

InfraRedline

iTrader: (4)

**** man that's sucks to hear Maybe a CPS backfire mixed with the fact that there wasn't oil pressure up to the tensioner yet which then caused it to jump? Who knows.

06blackg85ss

iTrader: (1)

well upon inspection over the weekend seems the exhaust cam is 180 out.
don't know how I fucked that up, but will retime it this weekend and hope for the best.
now comes the fun part of doing this in the car without dropping the chain cause it's gonna be a ***** to pull the front cover with the ati balancer
do have the cam gear holder tool available, but I will probably have to rotate the cam gear also which is going to make this interesting

InfraRedline

iTrader: (4)

You can do it pretty easily in the car without the holder. Just have a friend handy. I swapped my cams out just by zip tie-ing the chain to the gears and having a friend hold each one up while keeping tension as I swapped the cams out one at a time. It was pretty simple and only took a half hour or so. I get pretty lazy sometimes lol

armcclure

iTrader: (2)

I've done the same thing but with a bungee strap through one of the gear holes and hooked somewhere on the hood.

06blackg85ss

iTrader: (1)

yeah I've done it that way before, just not outside in the freezing cold lol.
I still can't believe I missed that
popped the valve cover saturday morning and instantly saw what was up. exhaust and intake valves shouldn't be opening at the same time lol

blueLNFftw

iTrader: (16)

Sure they are. Increased air flow mod FTW

06blackg85ss

iTrader: (1)

lol increased air flow, decreased compression to zero.
hopefully that's all that's up with it and it will be running friday night/saturday morning, then I can get back on the race car for once.
still have a ton of work left to do on this car, nitrous and meth install are the priority, but still have all the cryo2 stuff to wire up and plumb also. pretty much a solid day or so of wiring left to do
then new stereo system goes in (and wait til you see what I have in store for that lol)
figure if I'm gonna daily the car in traffic again, need me some good sounding speakers

TStone

iTrader: (2)

"assembled so many of these heads"

The cam gear only goes on the cam one way, because the notches are offset. So you would have had to force the gear onto the cam. kudos