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Picked up a S2000 with a seized motor need help!

Old 11-16-2018, 01:44 PM
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Default Picked up a S2000 with a seized motor need help!

Long story short I bought my friends 2000 s2000 that has a seized motor. I finally got the car to my garage last night and took the valve cover off and the cams. One thing I noticed I put the motor at TDC and noticed it was off, another big thing i noticed the intake cams were grinded down and metal shavings in the head, looked like oil starvation... Also the bolt that holds cam sprocket gear in place is snapped in half and came out turning it by hand... I drained the oil and had silver metal shavings but not too much. I am going to try and take the head off tonight but wanted to know if anyone had a similar problem or can steer me in the right direction on what i should rebuild. I found a used head locally that i was going to send to the machine shop to get rebuilt with OEM parts and ap2 retainers in the intake side. I hope the block is fine. Here are some pictures to show the damage.


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Old 11-16-2018, 03:45 PM
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Can you turn the engine by hand, easily with the wrench or ratchet socket tool? I asked, because you bought it "seized-up." Would indicate that you may have some serious bottom-end issues. Like frozen piston and shot main and/or rod bearings.

Looks like a major overhaul is in the future. Ever do one of these engines, esp one with seized piston(s)? From what others have said, on this site, doesn't seem to be an easy fix.

Good luck!

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Old 11-17-2018, 06:18 AM
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Read everything you can here. I have no direct experience in this area but recall neither the head nor block can be safely "shaved" as the clearances are so tight in the engine.

Depending on what you like to do this could be a fun project. Or a horrifying project. An engine swap seems probably but every video I watch about extracting our engines from the car puts this in my nightmares.

I'm sure many of us are interested in exactly what caused this and your solution(s).

-- Chuck
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Old 11-17-2018, 07:53 AM
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Odds are your bottom end bearings are toast. That caused your low oil pressure, which trashed your head.
Take the bottom end apart and see how bad the crankshaft is. Find someone selling a set of cam holders and a set of used cams.
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Old 11-17-2018, 09:55 PM
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Thanks everyone for the help. I have been searching a lot and reading up a lot from this site. Ive built a few cars in my past 1 all motor lsv ef and my last build fully built ls vtec turbo sleeved n orings made 614whp on e85. This will be my first f20 but I've already taken off most of the head off but will take it off completely tomorrow and see what the cylinder walls look like and see if they are okay if not will probably sleeve them. I learned a lot from this site already!
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Old 11-17-2018, 09:56 PM
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This is the S2k
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Old 11-17-2018, 09:58 PM
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Old 11-18-2018, 09:38 AM
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+1 on don't mill the head. Machine Shop may insist, don't listen to them.
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Old 11-18-2018, 09:54 AM
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Good thing you told me this. Reason why they shoudnt? What if the head is warped?
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Old 11-18-2018, 11:34 AM
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If head is warped beyond tolerance, you'll need another head. IIRC, milling the head and/or block will reduce the distance between crank and cam sprocket. Too much ---> beyond change tensioner's range.
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