How big of job is it to replace the 3.4L intake gasket

I do all the maintenance on our vehicles and have noticed lately that my wife's 2001 Impala is loosing antifreeze somewhere. The oil doesn't look like there is anything it it but a small amount I wouldn't be able to tell
by looking at it anyway. I don't see any antifreeze on the floor or driveway so I don't know where its going but given the 3.4L history I would bet its starting to leak in the intake gasket. I haven't picked up a service manual for this yet can someone tell me if its a job that I could do, I mean unbolt the throttle body and anything else attached to the upper intake, pull it off, pull the lower, replace the gasket, reinstall. Anything I need to watch for or any bolts need to be a specific torque? Thanks Eugene
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It's a good job. You can do itself. Just be sure to get yourself a GM shop manual, a torque wrench, time and patients. You're looking at 8 hours if you haven't done it before, and that's barring any other trouble that you may encounter.

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How much experience do you have in engine rebuilding? It is a little more than just replacing the gasket as sealants have to be put in the right places. You need a service manual and the service bulletin.

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Qwack wrote:

out and it blew and overheated before I could get off the highway. I haven't yet gotten a factory shop manual and it miht take some time if I order one and I was wanting to move quick on this to prevent any engine damage, If I can get a copy of the service bulletin will it tell me everything I need.
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snipped-for-privacy@columbus.rr.com says...

Sounds like lack of coolant changes in the past.

Some things that are important for a job like this that wont be covered in the book. Not sure if the book covers this one but drain your coolant before you start so when you pull the intake off coolant doesnt get dumped into your engine. The other is to keep you lifter valley super clean. You dont want chunks of what ever falling into your lifters. Use masking tape and suran wrap to cover that area while you clean the surfaces of the ports. Have a shop vac on hand to clean everything up nice. If its an aluminum surface use a plastic scrapper, if its iron use a metal scrapper. Thats all the advice I can give really.
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Bonneville wrote:

Yea that too. I treated it like any other college student would, but as hard as I was on that truck its still running, just about rusted apart but still runs with 170,000 miles. I drove it hard and never did any maintenance, the differential and trnasmission fluid are original. Replaced the stock spark plug wires when I rebuilt the engine, hauled over 1 ton of lumber, hauled cattel on it, carried millions of dollars in computer and e-911 equipment for installs. Right after I rebuilt the engine I got a better job so I bought a 2000 s-10.

Any special torque on the bolts? Any special places I need to put sealant on the gasket or is this a put nothing but the gasket on?
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"Eugene" wrote

132 "inch" lbs on the 4 middle bolts and the 4 outer bolts initially. Then you torque the outer bolts to 18 "foot" lbs.
No sealant on the gasket. The two end sections where you install RTV should be perfectly clean and dry (use brake cleen).
There are new bolts available that come with the proper loctite already installed on the bolt threads. If you are not able to get these bolts, clean the old ones and use a medium strength loctite on the intake bolts (lower intake only)
Ian
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Order the shop manual online from Helm and you will have it in a couple days. Do some google searches on the problem and read some of the information on the web. You may find a pointer to the bulletin. I had the url but dumped it along with the Venture and went to a Honda. There is a major problem with a company that makes an engine that disintegrates in 40k miles and won't stand behind it......

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www.TimmyChrist.com
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Something I forget about and a lot of other people seem to forget about are libraries! Libraries sometimes have car manuals that cover the cars you own. So look into that if you dont want to spend money on a manual for a one time job. Though owning your own manual is nice.
snipped-for-privacy@ncf.edu says...

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/repair_info/repair_info.jsp
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