Question about 2000 Hyundai Accent

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Replace valve stem oil seals

Can the valve stem oil seals be renewed without removing the cylinder head on hyundai accent 1.3 u.k model 2000

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  • Anonymous Mar 19, 2014

    91000 miles

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Make up an airline fitting that will screw into spark plug hole, or buy from autoparts , or tools supply place. You put compressed air in cylinder while changing, which holds valves in place.

Posted on Feb 21, 2009

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If it's that bad it needs oil seals, surely it'd better to strip and reseat the valves too. It's one of those fun jobs :)

Posted on Jun 17, 2011

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Hi please give some assistants on a huyndai gets 2004 models how do I replce the valve seals cause mine blow a ball of smoke out if the car stand for about 2day and its on the first start how do I relplace them thanx jannie

Posted on Dec 08, 2014

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No you can't. you have to remove the head. sorry. why do u want to do that. is it smoking blue? if thats the case u will have to do a complete service on the head

Posted on Feb 22, 2009

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It is better to remove the cylinder head and renew the valves stem seals as the vehicle has an age where the stem seals become hard where they can not hold the oil passing through to get into the valves stem and then to the combustion chamber area and get burn. Also by removing the cylinder head surely you will check for the piston rings against the bore if are worn then you should renew them,because if you fix only the cylinder head and do not do the piston rings if are worn surely you make the compression strong and weak piston rings you will have again may be worse oil consumption. Be very careful for the outcome.

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Blue smoke indicates burning oil in the cylinders. Could be worn piston rings, worn valve guides, or bad valve stem seals. An engine compression test may help find it, but a cylinder leak-down test is a more precise way to find where compression is being lost. If compression is good, you just may need to replace the old rubber valve stem seals. A shop could do it without having to remove the cylinder head, using an air compressor hooked up into each cylinder while the valve train is being worked on. The air is used to keep the valves from falling into the cylinder while the seals are replaced. About a 4 hour labor cost, so expensive, but a lot less than a cylinder head removal.

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Oil in a cylinder is never good. There are several ways for the oil to get there and different prices to fix it.

Valve stem seals go directly around the valve and keep oil from the valve train from entering the combustion chamber. A worn or cracked seal can let oil run into the wrong place. Depending on how the camshaft and valve lifters are fitted, the valve stem is at the bottom of the camshaft and lifter. The overhead Cam models bury to valve stem deep inside the head.

Good practice would be to replace all seals at same time, but 1 cylinder could be done independently. But you are usually doing 90% of the work to do 1 set of seals. If a V-6 engine do the bad bank completely.

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There are some tests which can help tell the difference between the problems. Some of it is visual so you need some disassembly for that. This is not going to be as simple as changing a waterpump or an Alternator. But the valve stem seals are reasonable and the head gasket is not so bad.

Can not say what labor will cost, but it will be probably 80% of the bill.

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How do you know it's the #4 cylinder? Main areas to look would be the oil/compresson rings and the valve stem seals.

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I hav 2000 grand marqius ls - When I changed spark plog thei found engine oil on it particularly cylinder No. 3 and 4 that the car was Shaking before I change the spark


When you get oil into the cylinders that are side by side, you may have a bad head gasket or bad stem seals on the valves. When all 4 cylinders on that side of the engine are oil-covered you can have additional problems like bad piston rings.

You should have a compression test to determine what the condition of the rings is before removing a head. If the compression is good, a good mechanic may be able to change the Valve seals without a complete teardown. If not, the problem must be fixed by pulling the bad head.

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How to chage valve seals


1- disconnect battery
2- remove valve cover
3- remove timing cover
4- set engine on top dead center #1cylinder
5- remove timing belt ( mark direction if re-using belt)
6- remove camshaft & rocker arms
7- remove spark plugs
8- install compression tester hose in cylinder that you want to replace seals and apply 90 to 120psi of air
9- install valve spring compression too and compress valve spring
10- remove valve spring locks and valve spring
11- remove old valve seal and replace with new
12- reverce order to reasable

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If the valve seal is leaking, the chances are that the valve guides will need to be replaced, maybe not now but soon so you might as well do both. If the valve stems are OK it would pay to reface the valves as well. This will require removing the cylinder head and an engineering works can do the work for you as the seals need to be pressed out and the new ones pressed in again and the head will need to be skimmed.

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Check for leaks around the engine which is a sign that the seal may be faulty and needs replacement. Check also if there is oil in the coolant, that could also be a sign that an oil seal is broken.

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I have hyundai accent GVS make 2002. My car has ran only 57000 kms however it has started consuming engine oil since sumtime now. If we think about any engine effeciency its perfect like a new car but when...


The valve stem oil seals sound like theyre worn and oil is getting past the vlaves and been burnt in the combustion chamber,once the valve stem oil seals are replaced it should cure your problem as with only 57k kms the piston rings shouldnt be worn yet.

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Oil in spark plugs


Change your piston rings. Check your compression. I'll bet that cylinder is more than 15% lower that spec.(all the others in the motor if its a older one.)If you just did that you will see some untell the rings seat. (if you made sure all the new ring gaps are not lined-up in the same place).
If the oil was on the top of the plugs you fix whatever is leaking on them. If it was on the electrode, the above is true. 

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