Question about 1998 kawasaki VN 800 Vulcan Classic

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Are you sure it's not gas mixed with oil? Sounds like the carbs are overflowing and filling the crankcase with a gas/oil mix. The rubber hose at the head should be for exhaust blow-by fume recirculation.

Posted on Jul 09, 2009

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  • Lee Muse Oct 15, 2012

    that was the original problem, thought sure the float was sticking. decided to rebuild carburater. no oil in oil , but have not connected hose to breatherbecause i think it will go to crank case

  • Lee Muse Oct 15, 2012

    no gas in oil

  • Lee Muse Oct 15, 2012

    as long as its idling it fine . as soon as you throttle up the engine it starts blowing out the rubber hose



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Fuel mixing with oil and filling oil tank and cylinder.

the ethanol gas has a way of ruining the rubber tip on the needle valve (in carburetor). When the rubber tip on that valve or the rubber on the Seat go bad, gas can constantly want to fill the carburetor bowl. so much so that it runs into the engine cylinder and past the Rings to the crankcase.
You can replace the needle valve and seat in the carb which is best OR you can put an in-line shutoff on the fuel line and turn it off when you are not using the generator.
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1 Answer

Spark Plug change

An individual ignition coil (1) is used for each spark plug. The coil fits into machined holes in the cylinder head. A mounting stud/nut secures each coil to the top of the intake manifold. The bottom of the coil is equipped with a rubber boot to seal the spark plug to the coil. Inside each rubber boot is a spring. The spring is used for a mechanical contact between the coil and the top of the spark plug. These rubber boots and springs are a permanent part of the coil and are not serviced separately. An O-ring (2) is used to seal the coil at the opening into the cylinder head.

1. Depending on which coil is being removed, the throttle body air intake tube or intake box may need to be removed to gain access to coil.
2. Disconnect electrical connector from coil by pushing downward on release lock on top of connector and pull connector from coil.
3. Clean area at base of coil with compressed air before removal.

4. Remove coil mounting nut (2) from mounting stud.
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I have a 1979 yamaha enduro 125cc i cant get it to start... i ran when i first got it and then it just died and i havn't been able to get it started... i changed the spark plugs cleaned the gas tank...

Did you squirt some gas in the cylinder to see if it would fire? Check the spark by laying the spark plug on the head, or holding it there with rubber handles, attached to the plug wire, see if you get a spark, if that checks out, you have spark, open up the air filter and peek in the carb, twist the throttle to see if gas comes shooting out. If not, squirt a little gas in the carb, try it, fire? check the fuel filter, pump, carbs could be gummed up. Did you get the jets clean? Run a wire through them to see if they are clear? Blow through them to check. Check it out.

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The mechanic should disconnect the spark plug cable to the spark plug first, Then take off the spark plug to the engine head.Take the bolt off to the engine head.then open the cylinder head place then turn the piston at the top dead center .place a rubber around the piston so that there will be no dirt to fall inside the engine..Use sand paper or any equipment that can be use that will not scratch the top of the the same with the cylinder head also.Don't forget to clean the spark plug also using sand paper.then clean the piston and the spark plug and the cylinder head using gas so that dirt can't stain in the engine.The exhaust hose and the muffler should also be clean.use long stick of iron or metal to reach the dirt or carbon in the exhaust hose and or the muffler., but first take off or disconnect the exhaust hose and the muffler to the engine.Then clean, and after that return the cylinder head,the spark plug ,the spark plug cable,back to its place .And after cleaning the exhaust and the muffler ,then place it back also to the engine.Before you start doing this make sure that the engine is off.

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1 Answer

Need specs on changing head gaskets on a 1993 ford crown victoria

Assuming that you have already removed the heads and dealt with the clearance problems of the lower-rear head bolts on both banks (you have to remove and install the heads with the lowest-rear bolts in the head -- secured with something like rubber bands -- in order to get the clearance needed):

To install:

1. Rotate the crankshaft counterclockwise 45 degrees. The crankshaft keyway should be at the 9 o'clock position viewed from the front of the engine. This ensures that all pistons are below the top of the engine block deck face.
2. Rotate the camshaft to a stable position where the valves do not extend below the head face.
3. Position new head gaskets on the cylinder block. Install new bolts in the lower rear bolt holes on both cylinder heads and retain with rubber bands.

New cylinder head bolts must be used whenever the cylinder head is removed and reinstalled. The cylinder head bolts used on these engines are a torque-to-yield design and cannot be reused.

1. Position the cylinder heads on the cylinder block dowels, being careful not to scratch the surface of the head face. Apply clean oil to the new cylinder head bolts, remove the rubber bands from the lower rear bolts and install all bolts hand-tight.
2. Tighten the new cylinder head bolts as follows:
1. Torque the bolts in sequence, to 22-30 ft. lbs. (30-40 Nm).
2. Rotate each bolt in sequence 85-95 degrees.
3. Rotate each bolt in sequence an additional 85-95 degrees.
3. Position the heater return hose and install 2 retaining bolts.
4. Rotate the camshafts using the flats matched at the center of the camshaft until both are in time. Install suitable cam positioning tools, on the flats of the camshafts to keep them from rotating.
5. Rotate the crankshaft clockwise 45 degrees to position the crankshaft at TDC for No. 1 cylinder.

The torque pattern follows:

left bank:
8 9
4 5
2 1
6 3
10 7

right bank:
9 8
5 4
1 2
3 6
7 10

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