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4

My best bet is that the spark plug is too long in the first place. I don't know what the stock spark plug should be for your bike, but the NGK you are showing may/may not be completely within spec and therefor is extending down into the cylinder longer than the spark plug should. If the bottom end was worn out enough to allow the piston to travel that far up ...


3

My first question is: is the mid point at 90 degrees the optimal temperature for the car to be running at. Or the max temperature where the cooling decides to work harder and bring it down if it goes over? Or is this the same thing? The system is designed to run more or less in the middle. Most gasoline cars are around 90-100 degrees Celsius. The ...


3

Your Golf should have two fuel pumps: one for the injectors (high pressure) and one which feeds the injector pump (low pressure). The low pressure pump would reside in the fuel tank. I'm thinking the low pressure pump may be going bad, as in getting weak. If it were starting to overheat, it may not pump fuel like it is supposed to and would cause the loss of ...


3

I know from experience that the doors like to rust after about 7 years if you're not careful. I don't know of anything else except the usual problems like cracking radiators, blown headgaskets and broken main bearings (usually under #3 piston). Other things that go wrong include the main oil seal and the clutch. If you have a VF39 STI turbo, it might crack ...


3

tl;dr: Ambient air temperature should generally not interfere with engine efficiency or fuel consumption, but will affect overall power output. Do not confuse efficiency with power output. These are two separate things. When your intake charge is more dense, you can throw more fuel at it and creates more power. (NOTE: The idea for the engine management ...


3

There are advantages, but also disadvantages to using a smaller turbocharged engine with a higher power output. The pro's of smaller, turbocharged engines: When not on boost (below e.g. 3000RPM) the engine uses much less fuel. turbocharged engines have a flatter torque curve, meaning they're working closer to optimal level throughout a larger portion of ...


2

In addition to size, weight and fuel economy, a small, highly tuned engine is going to be much more ecologically friendly. This is because a large engine producing 350 bhp can do it without being highly tuned - fuel is unlikely to be fully burned, emissions will be higher than with a smaller engine which can burn fuel more fully.


2

There are several advantages to a lower displacement engine over a larger one. Firstly is weight, an engine of 2,000cc will weigh significantly less than a 3,000cc engine because it will have a smaller block, this in turn decreases inertia of moving parts (such as the cylinder head and cam shaft). Secondly we can factor in fuel economy, if an engine has ...


2

The main reason for the use of a 2-stroke engine is it accelerates much faster than a similarly sized 4-stroke engine. The obvious reason for this is a 2-stroke cylinder fires on every revolution of the crank shaft, while a 4-stroke does it every other revolution. Also because the 2-stroke fires on every revolution, they only need enough weight to balance ...


1

Since diesel engines rely on compression to run and not a spark like a gasoline engine, heat is directly involved in the combustion of the diesel in the combustion chamber. The way this occurs is that when the piston comes up it compresses the air which is in the cylinder. This creates heat. When the engine is cold, a lot of this heat gets transferred out of ...


1

I think the problem is, one or both of your battery leads are not connected properly. You need to do two things when you installed the new battery. Ensure the leads are completely clean of any type of debris or corrosion. Second, ensure they are tight enough to have a proper and secure connection. I believe the Concorde has side posts on the battery. These ...


1

The sound of the clicking is from the starter relay. There is a little bi-metal strip inside of the plastic housing and it's flapping back and forth. It's the same concept as a turn signal, it's just happening more rapidly. It means the voltage on your battery is low. Even though you just drove it, it might not be holding a charge well. Very hot ...


1

My suspicions would lean more towards debris left in the block. Most salvage yards by their nature are not particularly clean. My thoughts would a rodent nest or other debris. Another possibility is not a clog but an air pocket that has settled in the heater core. If you check this site for no heat links you may find some info on determining how to resolve ...


1

You may be able to get close to what you want by installing a stainless steel exhaust (as opposed to the standard mild steel). It will give you a more raspy sound. In addition, deleting the center resonator/muffler and adding a freeflowing sports rear box with a large tip (diameter should be larger than the diameter of the pipe coming from the cat) would ...



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