Nissan xterra 2000 newly repaired engine loses pressure
I am not a mechanic and maybe I am wrong. The floaters are on top of the valves and if air comes to the floaters it will be because the valves do not seat well. You do not clarify what was repaired to the engine, or if that problem was done before breaking.
The engine had a crankshaft block rectified, a new water pump, an oil pump, pistons, bedplate rings, and no problem before repair.
In fact, in the beginning, it was repaired due to a fault in the oil pump and the mechanic says that we have to rectify heads and change drums because the engine with little lubrication was worked on the part of the heads and drums when there was the fault that is why they have that problem but the truth is I don't know about mechanics thanks
It is likely that when changing metals, pistons, rings, that is to say that it is ground down, the pressure it commands is very large and the cylinder head, valve seats, etc., must be rectified. We will see the opinion of an expert if he contributes something.
Thank you very much my friend, I think that will be what makes rectify what is missing and change boters if necessary. Thanks for the comments were very helpful.
It is assumed that it is necessary even if the pump is new to test if it sends lubrication to the camshaft before mounting it (a mechanical method is loaded and used to drive it in an oil circuit for this purpose). The camshaft and its whole is observed and its tolerances are taken. In the same way it is verified that the ducts to the head are free without obstructions. If an engine is rectified, all corresponding observations and measurements are taken to avoid precisely this situation.
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