LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old 10-29-2008 | 03:01 PM
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HOLY ****..

What the **** ate it? lol
Old 10-29-2008 | 03:18 PM
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**** it is not in one piece. I hope it broke then fell down, I'm hoping it didn't somehow find its way to a valve. I'm going to keep fishing around for the tip.

I think I should put some new pushrods in it maybe. Are these stockers Merv?
Old 10-29-2008 | 03:34 PM
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Alright I'm feeling a little bit luckier, got the top of it!






Seems to account for all of it, any idea on what the hell happened? Sorry for the picture quality.
Old 10-29-2008 | 07:57 PM
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OK so I did what I figure most people would do if they had two LT1's kicking around..... I stole the 4244 pushrods out of the motor I just pulled out of the car. I stuck them in a little less than 3 years ago when I did the head gaskets, they looked just like the day I put them in, so into this motor they went.

I did one full turn after zero lash, while looking into adjusting valves on here, I saw a few people did that. Seeing as they were loose at 3/4, I started from scratch, especially now that the lifters had at least got some oil in them. Its all back together, tommarow morning its turn the key time again, wish me luck.
Old 10-29-2008 | 09:25 PM
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Yea, they are stockers bro..never put in any aftermarket ones in that Engine. Looks like it was too lose and came out and hit something, then broke when it bound up. It shouldn't have hurt anything inside the Engine.
Old 10-29-2008 | 09:39 PM
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Just got mine started last week! and sorry to here about the bad luck.
Old 10-29-2008 | 10:07 PM
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Yeah Merv, I tossed some in there that are a bit fresher. Now that the lifters aren't fully collapsed like they probably were the first time I adjusted them I hope they are alright now. We'll find out in the morning. I figure it broke clean, doesn't look like any chunks or anything. I called someone around 3:30 when I found that one MIA and asked them if it could be loose enough to come out and they said yeah its happened before.

I was just happy I didn't have to pull the intake. I'm dying to drive this thing, not take 6 steps backwards.
Old 10-29-2008 | 10:25 PM
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That's good bro, I hope you get it all straightened out.

I can't wait to get mine running, so I know the feeling..
Old 10-30-2008 | 09:01 AM
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I officially hate adjusting valves. Now they seem too tight? Car won't fire off and stay running. Runs for about a second then dies. Great so at 3/4 turn they were way too loose, now at a full turn they are too tight???

Can someone explain to me the rotate the crank 8 times method? Like where the crank pointer is facing I can adjust what valve? The half and half method(#1 TDC then #6 TDC) seems to suck ***. Oh yeah and damn the LT1 for making me take the alternator off to get to the valve cover to come out. That part is getting old.
Old 10-30-2008 | 09:50 AM
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This is your problem..Me and only me would know this..this is something that I told you before but I guess we forgot it till now. I just remembered it.

The Hub went on 120* off of where it should be, as in it's a 1/3 turn from #1 TDC. This was before I realized that the Hub only bolted on a certian way, I thought at the time that you could bolt it in any way.
I didn't have a puller at the time so it went together like that, if I had a puller, I would have pulled it.

If I remember right, it's a 1/3 Turn behind where it should be. The easiest way is to pull the Valve Covers, turn the Hub to where #1 and #6 are closed, and then see where it is. Then check to see which one is at TDC.

I know this will help..then once you get this figured out, you can do the #1/#6 method without a problem.

Flame suit on..

Last edited by the_merv; 10-30-2008 at 01:01 PM.
Old 10-30-2008 | 11:06 AM
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Well I'm going to attack that now, now that I'm info equipped.

Figured out why code 43, the knock sensor is reading open. Great...... must have gotten damaged sometime between AK and going in the car, I'm ordering a new one today, should show up 1 PM tomorrow. I'm not shocked though, I banged the knock sensor on my other motor on pullout, I somehow have the feeling the guts of the sensor aren't built too stout.

For ***** and giggles I tested the one on the motor I pulled out. 4.2k ohms, within range. I know what a bitch they are to pull out, so instead of maybe needing two someday(potentially damaging the good one on removal, when that motor is destined for my truck), I just ordered a new one for the motor I just stuck in the car. $53 from the dealership, and like I always state, buy all your sensors from GM.

Last edited by camar0corey; 10-30-2008 at 11:15 AM.
Old 10-30-2008 | 12:59 PM
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Let us know how it goes..

Originally Posted by camar0corey
..must have gotten damaged sometime between AK and going in the car..
That's AR for Arkansas..
Old 10-30-2008 | 03:20 PM
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Yeah yeah, I've been a little stressed.

Third time's a charm! It was 120 degrees off, got that sorted out, fired right up again. New knock sensor is supposed to be in tomorrow at one, tomorrow afternoon will be first drive. Gotta stick some fluid in the rear end, have a pinion seal leak that can't be taken care of til next week.

Anyone see any issues with mixing normal gear oil with Royal Purple? Got RP in the differential now, but some has leaked out and well I'm not paying $15+ just to have more of it bleed out.
Old 10-30-2008 | 08:13 PM
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I'm glad you got that runnin, sorry I forgot that part. Was it behind where it should have been, did I remember that part correctly?
Old 10-30-2008 | 08:26 PM
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Yeah behind, pointer on the balancer is angled at the ground on the passenger side, I threw some whiteout on the top, I suppose I will find something a little more permanent to mark it with.

My question is, the hub is keyed, how did you manage to install it incorrectly? I'm not too worried, I did see it power your car to a 12.7. Sounded nasty today, I can't wait to get that knock sensor tommarow and take it for the first drive, should sound even better when not in limp mode. What's my luck with knock sensors and adjusting rockers? I suppose everyone has something that likes to go wrong for them. I had both these issues when I did my head gaskets three years ago.
Old 10-30-2008 | 08:42 PM
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Best way to fully ensure you are at TDC on #1 is to take the #1 spark plug out, get a thick drinking straw (McD's works well), insert into cylinder making sure it goes all the way in to where it's below the quench area, turn the engine by hand until the most resistence can be felt when tugging on the straw and also making sure both valves are closed. If a damper is not keyed you should never depend on using that as a TDC reference.
Old 10-30-2008 | 09:19 PM
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Oh Merv was right, its 120 degrees off. I had the angle finder I use when adjusting the torque arm as a reference. I have now marked #1 TDC on the balancer. I won't worry about it again unless I take all that apart someday, which I doubt. Someday this motor will probably go boom, hopefully not for a long time, but when it does something LS will be going in its place.

All I know is the valves are good now, that **** was driving me nuts.
Old 10-30-2008 | 10:02 PM
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I installed it 120* off cause I thought that it didnt matter what way that it went on for the Balancer. I installed it with the Heads off, so I knew easily that it would be #1 TDC, I just intalled it a third turn off..

The fastest time on that Engine was a 12.61@110.. so that should make you a little happy..
Old 10-30-2008 | 10:10 PM
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Nice, what was the 60' on that run? I can't 60' worth a damn, I think my best 60' is like 2.1
Old 10-30-2008 | 10:28 PM
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It was a 1.85..stock Stall, 3.73's.



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