Evo 4T Head Gasket

[wright4d]

Hi

Has anyone had to change their head gasket on an Evo 300 4T, I have a small water leak (just an occasional drip really) from where the recess is for the water pump. Water pump seal is fine.

If anyone has changed one any tips would be appreciated and how difficult is it?

Thanks

[nelly1]

have you tried re torquing it down first

[tman427]

What year Evo?

Just went through hell with my 2011....base and cylinder gaskets and then later found out I had no impeller blade to push the coolant.

If it is just the head gasket it should not be too bad as the cam assembly can stay in place.

If it is the two gaskets below you need to pull out the impeller shaft (thats how I found out I had no blade) to pull the cam and chain out of the way to pull the cylinders off. I had a Beta dealer mechanic do the work and reset the valves while they where at it.

Just waiting on the impeller balde now to finish up the job.

[motomofo1]

If the occasional drip you mentioned comes from below the water pump, more than likely you do have a leaky water pump seal. There is a small drip port on the bottom of the head, behind the water pump, which lets any coolant that leaks past the seal to drip out, rather than mix in with the engine oil. I had to replace the seal (which is also the same as from a KTM RFS engine, and is commonly stocked at KTM shops), and also the impeller shaft, as it had severe wear at the sealing surface. I went through the same problem with mine, and none of the so called Beta 4T experts here in the states could diagnose it before I tore it apart. Hope this helps!