08-18-2012, 06:25 PM
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Super Moderator
Join Date: May 2007
Location: Billings, Montana
Posts: 1,034
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In stock configuration, these are non-interference engines; you can have a valve fully open and the piston at the top of its stroke, and there will be no contact. Even in an interference engine, the timing would have to be off a considerable amount in order for pistons and valves to make contact. I can't say for sure, but I'm fairly confident that .4 mm will not be enough of a difference to cause contact between the pistons and valves (especially if it is timed properly).
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1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels |
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