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Discussion Starter · #1 · (Edited)
k20z3
Depois de trocar a bomba de óleo e limpar o motor quando esquenta começa com um barulho inusitado, alguém já passou por isso?

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it was the command chain( timing chain ) I changed it to a new one and the staff stopped
 

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Lotus Elise K20A2
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what engine are we talking about?
Did you replace the oil pump for the exact same type that was in there before ? if you went from balanced to unbalanced, you need to block an oil way or you lose a lot of oil pressure at low revs.
What bearing clearances where chosen? Where they confirmed with plastigauge measurements?
This could be rod knock from excessive clearances and/or too low of an oil pressure.
As long as the engine oil is cold, idle oil pressure is large enough to cope with both issues.
 

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Discussion Starter · #3 ·
what engine are we talking about?
Did you replace the oil pump for the exact same type that was in there before ? if you went from balanced to unbalanced, you need to block an oil way or you lose a lot of oil pressure at low revs.
What bearing clearances where chosen? Where they confirmed with plastigauge measurements?
This could be rod knock from excessive clearances and/or too low of an oil pressure.
As long as the engine oil is cold, idle oil pressure is large enough to cope with both issues.
Good morning, a k20z3
The pump was replaced with a type-r hot oil pressure is ok around 2.8bar (25 psi)
crankshaft and connecting rod bearing clearances all TSD

this noise do you think it could be (connecting rod or valve control)
Connecting rods or bronzing and new node recently exchanged for king racing black STD
 

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Lotus Elise K20A2
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there may be your issue with the King bearings in only STD size. Did you actually measure rod bearing clearance? You might have excessive bearing clearance.
King offers three sizes of bearings allowing to set 5 sizes. I also use them and always needed to mix sizes to get into the clearance tolerance range required.
 

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Discussion Starter · #5 · (Edited)
there may be your issue with the King bearings in only STD size. Did you actually measure rod bearing clearance? You might have excessive bearing clearance.
King offers three sizes of bearings allowing to set 5 sizes. I also use them and always needed to mix sizes to get into the clearance tolerance range required.
so in case it's at the mechanic, I'll talk to him about it but for me it's news about these sizes even in king the ones I bought on ebay is CR4542XP
Rod Bearings
I have for me that it measures as gaps but I will guarantee, out of curiosity how do I know the sizes? per model in the box?
 

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Lotus Elise K20A2
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you need to fit a STD size shell set and measures where you end up with. Then adapt the shell size to get the correct gap if required.
With Honda OEM shells, use the codes on crank, block and rods to determine size. Still, you check and use thicker or thinner shells, if required. This is from the service manual.
Honda offer 7 different thicknesses of rid bearing shells in increments of 6 µm.

 

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Discussion Starter · #7 ·
you need to fit a STD size shell set and measures where you end up with. Then adapt the shell size to get the correct gap if required.
With Honda OEM shells, use the codes on crank, block and rods to determine size. Still, you check and use thicker or thinner shells, if required. This is from the service manual.
Honda offer 7 different thicknesses of rid bearing shells in increments of 6 µm.

yes but in case you buy from honda, in Brazil honda no longer sells bearings for the k20z3,

oh what's left is king racing and acl
in the case of king racing has this parameter of measurements tb?
 
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