what does an ou-of-spec solid lifter sound like? v.I'm a Down's survivor
#1
Tour de Franzia
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what does an ou-of-spec solid lifter sound like? v.I'm a Down's survivor
I have a weird noise around the intake side on 3# that sounds like HLA noise, but more like tapping with a hammer, almost like a diesel. I listened around with a long socket extension and cannot isolate the noise...which tells me its valvetrain.
Thoughts?
Thoughts?
Last edited by hustler; 01-01-2010 at 02:47 PM.
#7
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Only time I've heard that is with low oil, so it's not getting to the HLA's, which obviously you do not have. The other other time I've heard it is with a spun crank bearing, where the oil hole was hitting the damaged part every revolution. That could be heard everywhere fairly noticeably, where as the HLA noise went away with higher rpms, as the pump would spin faster and get oil up there. Check the obvious, then start tearing **** apart.
#11
Apart from low comp and mad turbo I'm not familiar with your build. What have you done to the head if anything? I'm thinking possibly a sticky valve.
Edit: even if it is just an out of spec shim you have to ask yourself why it's suddenly out of spec. The Valve seat wearing is about the only thing that I can think of that would change the shim requirements
Edit: even if it is just an out of spec shim you have to ask yourself why it's suddenly out of spec. The Valve seat wearing is about the only thing that I can think of that would change the shim requirements
Last edited by Duckie_uk; 01-01-2010 at 03:48 PM.
#14
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I have heard the same noise from other 4W heads (similar to a noisy hydraulic lifter in tone and volume, from the center area of the head, hear it at idle). This includes my own head. I head the noise when I bought the car--bought it anyway, and have driven it 7 thousand miles now. Car has fine compression and leak down, so I don't let it bother me.