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

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Old Jul 20, 2009 | 01:43 PM
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I brought my car to a shop the other week to fix the oil leak and install my new clutch since I don't have much spare time this time of year. I was told it was the rear main when I had my tranny rebuilt but it was only a slight drip back then and I was low on funds so I put it off. it finally turned into a real leak now so I told this shop to do the rear main... so they did but it turns out it was the intake manifold now im out $400 and the shop can't get back to it till thursday. I was hoping to be driving it this week but I don't want to get oil on the new clutch. as it turns out I've got this week off so im thinking about tackling it myself but im not sure. how hard of a job is it? I've got a bad back so I can only spend so much time hunched over in the engine bay before I gink up so how long should it take a novice whos never done it before?

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Old Jul 20, 2009 | 01:51 PM
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It took me about 7 hours to complete it in the Winter. It's not THAT bad of a job. At first, it seems like a lot, but as you do it, it's not so bad. Get the full intake gasket kit with the o rings for the fuel injectors, etc. Use copper rtv to seal the front and rear parts. There are many write ups on the web.
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Old Jul 20, 2009 | 01:56 PM
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Originally Posted by z_speedfreak
I brought my car to a shop the other week to fix the oil leak and install my new clutch since I don't have much spare time this time of year. I was told it was the rear main when I had my tranny rebuilt but it was only a slight drip back then and I was low on funds so I put it off. it finally turned into a real leak now so I told this shop to do the rear main... so they did but it turns out it was the intake manifold now im out $400 and the shop can't get back to it till thursday. I was hoping to be driving it this week but I don't want to get oil on the new clutch. I've got this week off so im thinking about tackling it myself but im not sure. how hard of a job is it? I've got a bad back so I can only spend so much time hunched over in the engine bay before I gink up so how long should it take a novice whos never done it before?
It's not too difficult. I've never actually paid attention to how long it takes to remove and reinstall the intake because I'm always doing something else at the same time (like a cam swap). That being said, I don't see why it would take you more than an hour to completely unbolt and remove the intake. Spend time to thoroughly clean the mating surfaces of the heads, block, and intake. Scrape off all of the old gasket material (while being sure not to get any debris inside the engine) and clean the surfaces with brake cleaner. Get a new pair of Felpro intake mani gaskets and a tube of RTV. Apply a thick bead along the front and rear of the block rails and extend the bead 1" up each head. Be sure to set the intake down straight so you don't wipe away any of the RTV. Bolt down the intake using the appropriate torque sequence. I usually allow the RTV to set over night before I fire the car up.

Look below for the parts concerning removing and reinstalling the intake manifold. You should be good to go once you read it.

http://shbox.com/ci/cam_removal.html
http://shbox.com/ci/cam_install.html
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Old Jul 20, 2009 | 02:41 PM
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Originally Posted by xbcrguy182x
It took me about 7 hours to complete it in the Winter.
^^7 Hours to pull an Intake..?


Intake comes off fairly easily. Do you have access to a lift to pull the Tranny out?
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Old Jul 20, 2009 | 03:34 PM
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Originally Posted by the_merv
^^7 Hours to pull an Intake..?


Intake comes off fairly easily. Do you have access to a lift to pull the Tranny out?
He already has the new clutch installed and the rear main replaced, he doesn't need to drop the trans.
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Old Jul 20, 2009 | 03:41 PM
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K. Still.. 7 hours for an Intake?
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Old Jul 20, 2009 | 04:10 PM
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should be about a 3 hour job for taking it off and putting it back on. 4 tops
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Old Jul 20, 2009 | 04:13 PM
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7 hrs seems a bit long. i think we spent about 8 or 9 hrs doing my car but that included the intake manifold gasket, valve cover gaskets, and the oil pan gasket which took the majority of the time i think. we also cleaned and painted the intake manifold which took a bit longer.
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Old Jul 20, 2009 | 04:55 PM
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cool thanks for the responses and the links guys! I think you all just talked me into doing it. I think I'll do the tb bypass while im @ it... maybe get some RR's too but I'll hafta see, tryin to save for a road trip. the shop is about ~20miles away tho, do you think oil will get into my new clutch on the way home?
possibly more questions to come lol thanks again ppl!
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Old Jul 20, 2009 | 05:00 PM
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Originally Posted by z_speedfreak
cool thanks for the responses and the links guys! I think you all just talked me into doing it. I think I'll do the tb bypass while im @ it... maybe get some RR's too but I'll hafta see, tryin to save for a road trip. the shop is about ~20miles away tho, do you think oil will get into my new clutch on the way home?
possibly more questions to come lol thanks again ppl!
Well you need to swap springs at the same time you install 1.6 rr's. The tool used for the spring swap determines the length and complexity of the job. I have the Crane tool, makes it much easier.
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Old Jul 20, 2009 | 09:50 PM
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Originally Posted by ss.slp.ls1
Well you need to swap springs at the same time you install 1.6 rr's. The tool used for the spring swap determines the length and complexity of the job. I have the Crane tool, makes it much easier.
really? all the years I've been on here and I never picked up on that before owell I'll prob hold off on the RR's till when ever I get enough $ put aside to p&p my other set of heads which already have 918's on them.
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Old Jul 21, 2009 | 12:59 AM
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Originally Posted by z_speedfreak
really? all the years I've been on here and I never picked up on that before owell I'll prob hold off on the RR's till when ever I get enough $ put aside to p&p my other set of heads which already have 918's on them.
Yes really. But for 1.6 rr's and a stock cam, you can use a set of LT4 springs. They can be had for like 50 bucks.
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Old Jul 21, 2009 | 09:41 AM
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Don't worry about oil really getting on the new clutch if the intake manifold gasket is leaking, won't hurt you to drive the 20 miles. It's still not bad that they replaced the rear main seal though, that will wreck a clutch mighty fast, I know this first hand, reason I got around to putting my new motor in finally. I laughed when I pulled that clutch out, quite ruined.
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Old Jul 21, 2009 | 09:57 AM
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The intake swap doesn't take long if you just pull it off, do the gaskets and put it back on.

What takes the longest is the "while I'm in there" things. I ended up taking forever on my headgasket job because of that...
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Old Jul 21, 2009 | 10:28 AM
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well the leak is pretty bad which is why I think they thought it was the rear main, the old clutch def got soaked in oil..
so now I'm thinking about getting AI's 226/234 cam kit while I've got it torn open. I would like to have LE port my heads but I shouldn't spend that much $ right now, plus I would have to wait a few weeks.. I wish they just left my old clutch in when they realized they didnt get the leak
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Old Jul 21, 2009 | 10:29 AM
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Originally Posted by Tbird232ci
The intake swap doesn't take long if you just pull it off, do the gaskets and put it back on.

What takes the longest is the "while I'm in there" things. I ended up taking forever on my headgasket job because of that...
yep, its starting already and I haven't even turned a wrench yet! lol
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Old Jul 21, 2009 | 11:08 AM
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Originally Posted by z_speedfreak
well the leak is pretty bad which is why I think they thought it was the rear main, the old clutch def got soaked in oil..
so now I'm thinking about getting AI's 226/234 cam kit while I've got it torn open. I would like to have LE port my heads but I shouldn't spend that much $ right now, plus I would have to wait a few weeks.. I wish they just left my old clutch in when they realized they didnt get the leak
Great choice! And there is not better time to do it.
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