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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , and Lx series.

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Old 12-08-2016, 03:37 AM   #1
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RB Can an RB25DET head be resurfaced with cams installed?

Gonna get my head resurfaced but im wondering if i need to take it apart first? If i need to can anyone give some good pointers/instructions/walk through for assemble and reassembly? Thanks in advance!
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Old 12-08-2016, 04:32 AM   #2
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Strip it. Last thing you want is stray metal shavings working their way into a cam journal or something. Besides, if you're getting it machined, might as well give it a complete overhaul.

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Old 12-08-2016, 05:01 AM   #3
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I would at least have the guides(exhaust side) checked, valve seals replaced and the valve seats inspected. A quick vacuum on the ports with valves installed will tell you if you have s leaking seat or not.
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Old 12-08-2016, 05:48 AM   #4
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Yes take it fully apart
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Old 12-08-2016, 06:32 AM   #5
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It's kind of hard to fixture it flat to deck it with the cams and cam caps sticking out... usually a head can be decked with the valves and valve springs installed with a few exceptions such as the 4g63 head as their exhaust valves extend past the deck.

So, long story short take it apart, it's not hard to re-assemble.
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head resurface, rb25det, resurface

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