Question about 1999 Chevrolet Tahoe

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How many hours hours does it take to replace the intake manifold gasket on a 1999 Tahoe 350 engine?

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"Book time" for the upper intake is 1.5 hrs - 4.8 hrs for lower & upper.

Posted on May 27, 2011

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On a 3500 dulley 4x4 big block chevy gas engine, I have a cylinder 8 misfire and engine light. It also had a mass aire flow indication but that was replaced. only 86000 miles on 03 truck


Check the intake manifold gasket. If it leaks it will draw air into engine and this air bypasses the mass air flow sensor which will cause a rough idle or running symptom from running too lean. If you change the intake manifold gasket you should probably change the valley pan gasket at the same time. A dealer will change both for less than $500 and you might save some more if you dig around on GM Service website and find a coupon discount (Usually 10%-20%). You might save more at a local shop if you trust them and they do this type of work. Getting to the intake manifold gasket also exposes the valley pan and since you are already there it only takes a little more to change that gasket too. Some GM V-8 engines use a little oil between oil changes and if both gaskets are meticulously changed at the same time it will sometimes fix the oil usage. It did for me on my Tahoe (126k miles).

Jun 10, 2014 | 2002 Chevrolet Tahoe

1 Answer

White smoke in exhaust 1999 lincoln after replacing intake manifold


Sounds like antifreeze leaking in to me. Ports at rear of intake are trick and easy to get that gasket mis-aligned. Hate to say it but when you take the intake back off I imagine the culprit will be obvious. Only other thing is that the intake wsa fine and you actually had a blown head gasket.

Apr 17, 2013 | 1999 Lincoln Town Car

2 Answers

I have a 02 Chevy tahoe....it sounds like coolant rushing throughout the engine while sitting at an idle and about every 2 or 3 days I gotta add coolant its not much also the low coolant light comes on...


I would perform a coolant pressure test because these engines are known for leaking intake manifold gaskets.Check and see if your oil is starting to turn a creamy tan color.

Jan 24, 2012 | 2002 Chevrolet Tahoe

1 Answer

I have an intake leak where the 2 gas lines go into the intake, what would cause this and how do i repair it? the engine was recently removed and replaced if that helps and it is on a 1998 chev tahoe with...


you will have to remove upper intake plenum the black plastic part there is a o-ring around the area you are speaking of. now if this engine didn,t have the intake gaskets replaced before installing now would be good time because if you keep vehicle believe me you will have to do sooner or later these engines came with plastic intake gaskets that are notorious for leaking to do this you will njeed to remove both upper and lower intake manifolds I just started a job on 99 tahoe today before lunch and customer is driving tonight replaced upper and lower intake gaskets fel-pro makes updated gaskets for this engine that has thick metal shim and rubber gaskets a great improvement that ends this problem as for your vacuum leak at opening for fuel lines don,t see often but is possible hope this helps

Mar 29, 2010 | 1998 Chevrolet Tahoe

3 Answers

1999 tahoe has water mixed with engine oil.RBM starts to decrease. what should i do ?why water mix with oil? in the future ,what are the consequences?


Get that fixed ASAP, Water in the oil will destroy the bearings. The intake manifold gaskets may be bad, leaking water into the engine. Have a repair shop check it out and recommend repairs. Do not put this off, unless you want a new car.

Nov 04, 2009 | 1999 Chevrolet Tahoe

1 Answer

My 1999 chev Tahoe is leaking fluid, it is coming from a plastic piece where 2 hoses meet on the right passenger side of the engine compartment. The color a clear redish.


ITS ANTI FREEZE THAT YOUR LEAKING. IT COULD MORE THAN LIKELY BE INTAKE GASKET, BUT THERE IS A FITTING THAT LEAKED ALL THE TIME TOO. IF ITS THE INTAKE GASKET MAKE SURE TO REPLACE THAT FITTING TOO.

Oct 30, 2009 | 1999 Chevrolet Tahoe

2 Answers

My 1999 chevy tahoe is leaking antifreeze. I


it could but- check passenger side front where heater core line go into manifold right behind alternator the hose line is connected by a press clip into an alloy fitting this fitting gets eaten away by anti freeze and hose angle pulls back on fitting the part is $18 at dealer and is screwed into manifold use caution if ur r going to replace at very edge of aluminum manifold---and check ur water pump bolts the 2 longer ones should have a lock sealant on them they bolt in thru a water jacket

Oct 24, 2009 | Chevrolet Tahoe Cars & Trucks

1 Answer

Cylinder #2 Misfire-after intake manifold replaced


It's possible he has two plug wires crossed, or pulled a spak plug wire apart replace #2 spark plug wire First. To test check the firing order and make sure all the wires on the right plugs and the correct place on the distributor, if it is right, then buy a can of carburator cleaner and spray around the intake gasket if the engine revs up when you spray the carb cleaner around the intake manifold with (engine running) if the engine rpm revs up you have an intake leak.

Jul 03, 2009 | 1997 Chevrolet Tahoe

1 Answer

Antifreeze leak


DO NOT DRIVE THE CAR until this problem is fixed! You could destroy the engine.

Many GM V6 engines of 1995-1999 had defective Upper Intake Manifold (UIM) gaskets (this is especially true for 3800 V6 engines). The antifreeze/coolant (especially orange DEX-Cool) will deteriorate the gasket material over time. If there are abnormal exhaust noises accompanying the leak, and/or the oil appears cloudy (check this immediately), you may have a blown head gasket or Lower Intake Manifold (LIM) gasket. Start with the UIM gasket.

The repair is detailed in the Haynes manual for that car ($17 at NAPA and Carquest), and (DIY) will take 5-8 hours plus a new gasket and RTV sealant (parts should be under $40 for all). A shop will charge $250-350 for this job.

Oct 08, 2008 | 1995 Pontiac Grand Am

2 Answers

How to fix blown head gaskets on a 1996 tahoe


make sure to check the fiting that goes on the heater hose, because they have very coming problem with that, and actually if the leak is between the head and the intake what you need to replace is the lower intake gasket and not the head gasket,
since the head gasket is located between the head and the engine block. check the fiting i'm talking about and let me know how things goes, it might save you a headache

Jun 15, 2008 | 1996 Chevrolet Tahoe

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