Harley Davidson Evolution Leak

The weeping base gaskets were not a gasketing problem at all but one of engine design.

Harley davidson evolution leak. Harley-Davidson began attracting a less forgiving clientele with the Evolution. This is a common problem not only on the Evolution Sportster but on the Big Twin Evolution engine as well. The design of the Harley-Davidson engine and the intake manifold make it prone to air leaks.

National Highway Traffic Safety Association. All you need is a can of penetrating oil like WD-40 with. Or stalls completely you should replace your intake seals.

In 1984 Harley-Davidson introduced the Evolution engine a replacement for its Shovelhead engine. If your idle fluctuates or if bike races. To fix the problem youll have to pull the heads and the cylinders off.

The picture was taken in 1979. The 1340 Evos are tempermental in that not warming them up enough and riding them moderately hard can cause premature base and head gasket failures. The information comes to us via a Vehicle Identification Number deciphering guide Harley-Davidson submitted to the US.

Improper installation and age are two major contributors to the condition. The task is fairly straightforward but there are a few differences between varying Harley-Davidson models. It was made in the 1340 cc 82 cu in displacement for Harley-Davidson Big V-twins bikes replacing the Shovelhead engine until 2000 when the last EVO was placed in a production factory.

If the compression andor leak down test show that top end needs attention you can address the issues and the only wasted time and cost was the time it took to RR just the head and the cost of the gasket. And every motorcycle can leak oil especially if certain components are faulty. This construction method had the advantage of.