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Guest Message by DevFuse

FJ20 pistons. Is this normal?

Started by sunny1600 , Jul 19 2011 04:28 AM

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2 replies to this topic

#1 sunny1600

IV

Members
185 posts

Gender:Male
Location:Eindhoven, The Netherlands
Name:Mark
Car:S12 Grand Prix

Posted 19 July 2011 - 04:28 AM

Just took off the head of my FJ20 and am wondering if this is normal. I mean the small dents in the pistons.

Or do I need to buy new pistons?

Thanks
Mark

Nordschleife counter: 2009: 4 laps (N14)2010: 24 laps (N14)2011: 11 laps (S12)

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#2 jimmyjams

IV

Members
108 posts

Gender:Male
Location:Sydney, NSW
Name:James

Posted 19 July 2011 - 10:38 AM

By dents do you mean the 4 valve reliefs on the top of each piston? if so than its normal. they give clearance for the valves so they dont hit the pistons as the engine rotates.

Also when you assemble your FJ make sure you set the timing correctly because the FJ is a interference engine, meaning if you dont set the timing correctly you will bend valves and damage the engine. Good luck mate!

85 S12 Gazelle IRS FJ20et94 180SX Strawberry face SR20DET 270.5kw