Drewster2016 Posted November 23, 2014 Share Posted November 23, 2014 I found a truck on Craigslist I want to take s look at.. 191k 4x4 extended cab 1999 Sierra. If just need to do cab corners and he has the other rocker I just have to install.. Only issue really is it needs intake Gasket. How big of a problem is this? Is it easy to do yourself? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
chupe442 Posted November 23, 2014 Share Posted November 23, 2014 If you are mechanically able, its not that bad of a job really.. Just pay attention to the wires, and hoses that you disconnect. Many connectors will be a bit brittle from age but its not a specialist job. Are you sure its an intake issue? Link to comment Share on other sites More sharing options...
Drewster2016 Posted November 23, 2014 Author Share Posted November 23, 2014 If you are mechanically able, its not that bad of a job really.. Just pay attention to the wires, and hoses that you disconnect. Many connectors will be a bit brittle from age but its not a specialist job. Are you sure its an intake issue? The guy said it's the intake manifold gaskets.. But I'm not really sure. I just don't want to buy a money pit Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
8.1HD/ALLISON Posted November 23, 2014 Share Posted November 23, 2014 Intake is cake work compared to body work. I assume it has the 5.3? Should take more than 2 hours or so for anyone mechanically inclined. Link to comment Share on other sites More sharing options...
chupe442 Posted November 23, 2014 Share Posted November 23, 2014 I would ask as to how they know they have a leaky intake gasket... Back in the day, we would take carb cleaner and "puff" it around the intake of a cool running motor. A sudden rise or fall of RPMs would indicate a bad seal... Now if they are losing water and just assuming it is disappearing in the exhaust, I am not sure you will be able to tell this until you pull the intake and see the water puddled and/or see the failed seal/gasket. Hopefully someone will ad to my suggestion and either agree or correct it.. Its been a long time since I had to do any of this diagnosing... Link to comment Share on other sites More sharing options...
lunytnz Posted November 24, 2014 Share Posted November 24, 2014 I have a 99 Yukon (with a 5.7L Vortec) and had to have the intake manifold gasket replaced on mine a few years ago. I opted to let a shop do it because I didn't have the time. I was about $800, total, but other "while you're at it" stuff added another $400. Plus, as someone mentioned, some things were brittle and broke, which added to the cost. The mechanic said the intake gasket is a known problem on these engines and said the replacement gaskets addressed the problem. I'm mechanically inclined, but I'm wondering whether I want to even tackle replacing the FPR and the spider injectors in mine, at the moment. Link to comment Share on other sites More sharing options...
white1500 Posted November 25, 2014 Share Posted November 25, 2014 If an intake manifold gasket can scare you off then you need to buy a brand new vehicle with 0 problems and a full warranty. Link to comment Share on other sites More sharing options...
wing98 Posted November 28, 2014 Share Posted November 28, 2014 it is a fairly easy job the only thing you really have watch for is to get the distributor back in the right place . I have done a lot of these over the years it takes about 3 to 4 hours Link to comment Share on other sites More sharing options...
ltj9296 Posted November 30, 2014 Share Posted November 30, 2014 Not to tough of a job, imo. They may be some youtube videos on how to do it( I have not checked). My biggest concern would be if that was really the problem. Link to comment Share on other sites More sharing options...
GuyGene Posted November 30, 2014 Share Posted November 30, 2014 I can pretty well assure you it's the intake manifold gasket on the '99. My '96 Vortec also had that issue, which is about guaranteed to happen to the '96-'99 year 5.7s. A known issue. GM didn't use a good gasket or sealant. Find out if it was driven much with manifold leaking, if not and price is right, I'd get it. Again, the '96-'99 Vortex 5.7 (350) WILL have intake manifold gasket go out. Link to comment Share on other sites More sharing options...
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