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What does a oversize head gasket means - Cars & Trucks

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It just means the material used is thicker , helps to get a better seal to stop coolant leaking through to cylinders

Posted on Nov 18, 2014

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Posted on Jan 02, 2017

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Compression cylinder low #2 and #3 cylinders.


there are only four possibilities left:
1: valves are not fully seating - adjust rocker arm / cam
2: piston rings are bad - replace rings
3: holes in pistons - replace
4: cylinders out of round - most complicated repair, bore / machine cylinders and replace piston rings with oversized rings.

of course you could just have 'gunk' on the valves preventing full closure........

Jul 23, 2014 | 2001 Hyundai Tiburon

2 Answers

I have a 95 buick regal 3.8L. I changed the valve cover gaskets and after I was done the car idles rough. I did a vacuum test on it and it indicates that its a worn valve guide. Is it possible that I got a...


Anything could have caused that, it is unfortunate! I have that engine on my Bonnieville, and it is a great one!

Please check any other possible cause first!

You should note that the 3800 engine uses integral valve guides. IE; they are a part of the cylinder head and cannot be replaced. They can be reamed oversize if they are found to be worn past the appropriate limits. Sometimes, the valve guide bore will be oversized as manufactured. This will be marked on the inboard side of the cylinder head on the surface just above the intake manifold.

This could be fixed by reaming and replacing the guide with oversized stems.

If you need more info let us know!

Brian

Aug 03, 2008 | Buick Regal Cars & Trucks

2 Answers

My 2000 dodge caravan engine was run very hot and now i have coolant leaking out of the muffler. dose this mean i have a blown head gasket.i do not have any fluid mixed with the oil. please help....thanks


If you have coolant leaking out of the muffler the head gasket is most likely blown. The head gasket has passageways through it for coolant water, exhaust, intake and engine oil. Depending on which location the gasket has ruptured you can mix fluids or gasses in several combinations. The only way coolant can get to the exhaust is through a cracked head or blown head gasket. If the head is cracked and another head is installed a new head gasket is installed because reusing a used gasket is very risky. The only to be sure what is broken is to take the heads off. If only the head gasket is blown the head is usually warped and should at least be milled if not replaced. I hope this helps.

Aug 10, 2011 | 2000 Dodge Caravan

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I WHANT TO STRIP THE ENG TO FIT NEW ORINGS AND GASKETS


ok bud, dont know what the hell you mean. stripping the engine usually means pulling everything off untill you have nothing but block left. you can bore the cylinders to accomodate oversized pistons or even turn it into a stroker. need more info on what u need.

Feb 11, 2011 | Mazda RX-8 Cars & Trucks

2 Answers

Blowing anitfreeze out the tailpipe. I know this means a head gasket. When the engine runs, it blows antifreeze out the passenger side of the engine at the exhaust manifold by the middle cylinder. Does...


could be just head gasket and bad exhaust manifold gasket (coolant leaks past head gasket into exhaust port then leaks out of exhaust manifold gasket)
or it possible that head is cracked too
Only way to know for sure is to remove head and inspect it

Jan 06, 2011 | 1986 Ford Bronco II

2 Answers

Stripped Oil Pan -- Oversized Plug?


being age of vehicle not much could do, i would recommend the oversize drain plug which has a plug inside the bolt so dont keep taking out of oil pan

Feb 04, 2010 | Hyundai Motor 2003 Elantra

3 Answers

Lost power and smokes like the dickens


If it's white smoke, the head gasket is blown
If it's blue smoke, major problem, valve and piston and ring job.

Feb 02, 2010 | 1999 Dodge Ram 2500 4WD

2 Answers

My mileage is over 130,000 ansd my car smokes when i drive it. It's white smoke. What's wrong with my car?


white smoke means water or antifreeze. blue smoke means oil. black smoke means rich fuel mixture. So if it is white you are burning antifreeze which usually means you have a bad head gasket or intake manifold gasket. is your car over heating? that is the main symptom of a bad head gasket. how much white smoke are you getting if it is not much it could be just condensation and nothing to worry about.

Nov 02, 2009 | 1999 Dodge Intrepid

2 Answers

I just changed the thermostat on 3.4 L 1999 Pontiac Gr Am GT THINKING IT WOULD FIX THE OVER HEATING. But there is white steam coming out the exhaust! The oil is not milky so it's not a head gasket. There's...


Are you adding coolant?
Yes ......means it's going somewhere.
Fill the coolant tank to the top...right to the top....leave the cap off and run the engine.
If you see bubbles you need a head gasket.
The intake gasket is another source of coolant leaks and at this area the coolant can be sucked into the engine and produce a white smoke.
Does the car run rough at the first start in the morning....could be antifreeze burning off in the cylinder or area that was leaking overnight meaning cyl gasket or intake gasket.
Look at the rear head to block area below the exhaust manifold.
Is there any trace of coolant or stains of coolant......yes means head gasket time.
Pressurizing each cyl at a time with air with the valves closed in that cyl will quickly show the location of the bad head gasket with bubbles coming out of the fill tank on the bad cyl (s).
Head gasket leaks don't always mean milky oil.

Aug 12, 2009 | 1999 Pontiac Grand Am GT

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Piece of @#$%


I'm afraid the only advise I can give, is to overhaul the engine.

It's using oil, therefore the piston rings are worn out, as well as the bearings, (Crankshaft, camshaft, and connecting rod) The cylinders may need to be bored larger, and oversize pistons installed, (As well as oversized piston rings)

When bearings are worn, this increases clearance between the bearing surface, and the object the bearing is installed on. Oil squirts out, and is thrown up on the cylinder walls, making it's way to be burned along with the fuel/air mixture.

New gaskets will be installed, which will stop the oil leaks. The water consumption should stop. (Provided you just have a warped cylinder head, and/or blown head gasket. If the cylinder head is cracked, it will need replacing)

You will get Much better gas mileage, and the engine should run another 200,000 miles at least.

Jul 26, 2009 | 1990 Toyota Celica

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