I posted this in the parent forum but I haven't been able to garner a response. It's a bit of a barren wasteland there.
I pulled the head off the engine I'm rebuilding and started fiddling with the tappets. From what I've read it seemed like they should all have a certain sponginess to them, but of the 24 tappets, only three of them were at all pliable. Then I took a look at the cam trays and started to think it might be possible that the last person to pull the head off (it's clearly been worked on before) replaced the trays in reverse. This would have effectively starved the tappets and cam journals of oil for however long this engine was run after the head work, but if this were the case I'd have to think there would be far more damage than I'm seeing. A couple journals are scored but nothing that would indicate catastrophic lack of lubrication... Also I'd have to think that the guy couldn't have been so inept as to overlook something so critical.
Let's assume that they were installed correctly, is there a reason I can only manipulate three of them with my fingers? Should it take more force than that to compress them?
Then let's assume the opposite is true and the guy really was completely aloof. Would there in fact be considerably more damage? Are the tappets seized? Can they be repaired or should they be replaced?
For what it's worth cylinder's 1/2/3/5/6 all passed a leak-down with flying colours, cylinder 4 flunked (60psi) and there's also no indication that the pistons and valves have been formally introduced to one another.
Cam Tray
Cam Tray Closeup
Cylinder Head Closeup
I pulled the head off the engine I'm rebuilding and started fiddling with the tappets. From what I've read it seemed like they should all have a certain sponginess to them, but of the 24 tappets, only three of them were at all pliable. Then I took a look at the cam trays and started to think it might be possible that the last person to pull the head off (it's clearly been worked on before) replaced the trays in reverse. This would have effectively starved the tappets and cam journals of oil for however long this engine was run after the head work, but if this were the case I'd have to think there would be far more damage than I'm seeing. A couple journals are scored but nothing that would indicate catastrophic lack of lubrication... Also I'd have to think that the guy couldn't have been so inept as to overlook something so critical.
Let's assume that they were installed correctly, is there a reason I can only manipulate three of them with my fingers? Should it take more force than that to compress them?
Then let's assume the opposite is true and the guy really was completely aloof. Would there in fact be considerably more damage? Are the tappets seized? Can they be repaired or should they be replaced?
For what it's worth cylinder's 1/2/3/5/6 all passed a leak-down with flying colours, cylinder 4 flunked (60psi) and there's also no indication that the pistons and valves have been formally introduced to one another.
Cam Tray
Cam Tray Closeup
Cylinder Head Closeup
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