Question about Yamaha V Star Classic Motorcycles

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Oil leaking from front cylinder head, high on the front of the cylinder.above the horn.

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Tighten the cylinder head down and hope the gasket seals up. It probably will.

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Posted on Apr 22, 2009

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If the oil is leaking from the heads above the cylinder, the unit has defective rings. If unit is leaking oil below cylinder the unit has a bad gasket.

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Oil in the cylinder area above the spark plug = leaking valve cover gasket

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Cylinder head oil leak


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Possibility of a cracked block. how can i be sure/


Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
(a) motor oil contamination of engine coolant
(b) coolant contamination of motor oil
(c) white exhaust smoke, due to coolant seeping into one or more cylinders.
(d) more than one of the above
(e) all of the above

Oil infiltrating into coolant is easy to see - drain some coolant out through the pepcock at the bottom of the radiator, and place it into a styrofoam coffee cup. Oil droplets floating on top of the green (or orange) coolant are easily seen. Or visualize oil by looking into the top of the radiator through the radiator cap.
Coolant infiltrating into and mixing with motor oil will permanently damage the engine (seizing it up through loss of lubrication), and must be prevented.
A leak from above the front suspension is, as physicians like to put it, "nonspecific", with the most likely cause a water pump seal or hose/hose connection.
A leak from near the fire wall will usually be a heater core hose, or hose connection.
A coolant leak on the same side of the engine as the water pump is a leaking water pump or water pump seal until proven otherwise.

To rule out everythng else, here's the 1999 Honda CR-V Troubleshooting Guide for Coolant Loss/Coolant Leaking:

Priority Action Part Type Cause
1 Inspect Water Pump - Worn, Cracked or Leaking Water Pump, or Water Pump gasket.
2 Inspect Head Gasket - Leaking Head Gasket.
3 Inspect Radiator - Leaking Radiator Hose(s).
4 Inspect Radiator Cap - Worn or Damaged Radiator Cap.
5 Inspect Radiator Hose - Ruptured, Cracked or Leaking Radiator Hose.
6 Inspect Freeze Plug - Leaking Freeze Plug(s).
7 Inspect Intake Manifold Gasket - Leaking, Worn, or Damaged Intake Manifold Gasket.
8 Inspect Water Outlet - Cracked, Leaking or Damaged Water Outlet.
9 Inspect Heater Control Valve - Leaking or Faulty Heater Control Valve.
10 Inspect Radiator Drain Pepcock - Loose, Damaged, or Faulty Radiator Drain Pepcock, or Pepcock O-ring.
11 Inspect Engine (DOMESTIC ONLY) - Cracked Cylinder Block Leaking Coolant into at least one Cylinder, causing white exhaust smoke.

Dec 03, 2011 | 1999 Honda CR-V

1 Answer

I HAVE 1997 FORD TAURUS, AND IT HAD AN OIL LEAK, HOW CAN I TELL IF IT IS THE OIL PAN OR A BLOWN HEAD GASKET?


the head gasket is on the engine higher than the oil pan so if the leak is not were the head meets the cylinder block and running down towards the bottom of the motor then the head gasket is not the problem.if the leak is only around the oil pan area and slightly above it then its probably the oil pan that is leaking.fluid leaks travel backwards or downwards not up.

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2004 vw touareg 2.5 tdi the oil sump was full of water and oil mix,also inlet manifold had oil and water mix.number 5 cylinder had locked up and engine would not turn,so i removed glow plugs and cranked...


Can not be water pump, because that has a vent hole to the outside, and does not at all allow access to crankcase or cylinders. Oil cooler is also unlikely because oil is under more pressure than the water, and it would not get into the cylinder.
Water in the cylinder means up high.
That means head gasket or cracked head.
You can tell with a leak down test.
You borrow the gauge from a place like Autozone, and replace the water reservoir cap with it. Over pump it, about 30 psi. And watch for leaks. If same cylinder keeps filling, then you know where the bad gasket or head crack is. Diesels often crack heads. Not hard to do, but new head is not cheap. Probably $500 for part, $400 labor.

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1 Answer

My vw golf 1.6 2002 plate burns to much oil it has a high engine pressure and it's burning a lot of fuel. It also produces a high amount of smoke or a short period. It has only done 70000 miles. I noticed...


Typical worn engine symptoms. The oil burning and smoking is most likely the valve stem seals gone hard and worn allowing oil into the cylinders when running.

They can be replaced insitu by most shops without removing the cylinder head.

White Mayonnaise on the oil filler cap and in breather pipe is often from engine always running too cool or many short trips....under 5 miles. Coolant temperature should be 85C and above after a mile or two.

If the pistons are worn, a used engine would be best bet..

In order to know how worn the engine is the engine needs a compression test and a leak down test. if the shop you take it to does not know what a leak down test is, take it some else.

Compression pressure should be even on all cylinders and around 130 to 180 pis.

A' leak down test' is putting air into each cylinder with a special two gauge tool and measuring the cylinder air loss in percentages. Good engine will be 5% to 15% loss. Bad engine will be 25% and above.

On a diesel engine the percentages will be the same but compression will be 400PSI or better.

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1 Answer

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