502 engine build

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01-25-2017 | 08:41 PM

#31

F-2 Speedy

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From: Midwest & T-Rock

Quote:

Originally Posted by mike tkach

i have used both,imo they are equil,both use arp bolts and the big end size is spot on all the ones i have used.the pricing is also about the same.when it comes to crankshaft,s i would go with the scat,for some reason the eagle cranks i have used had journal dias all over the place.the scats were right on size.

I used SCAT cranks also

01-26-2017 | 11:15 PM

#32

Heyglenn

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From: fox Lake IL

Quote:

Originally Posted by mike tkach

^^.i would for sure mark the injector location,then remove them and send them out for flow testing&cleaning.as part of the rebuild.

Good call on this, I disassembled the heads last night and found a lot of unevenness between cylinders on how clean the intake runners are, and how heavy the deposits were on valves. Who does this?

Also, someone mentioned stainless and inconel valves. Since these motors have been apart before how could I identify what kind of valves are in there now? I ask because I noticed a magnet does not stick to the bottom (valve) half of the exhaust valves, it will stick to the stem, and all over the intake.

01-27-2017 | 06:24 AM

#33

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From: On A Dirt Floor

Member ArticFriends, in Michigan, is close to you. He can do your injectors. He's quite intimate with the 502MPI system. LOl.

http://www.offshoreonly.com/forums/g...injectors.html

01-27-2017 | 06:39 AM

#34

F-2 Speedy

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From: Midwest & T-Rock

Quote:

Originally Posted by SB

Member ArticFriends, in Michigan, is close to you. He can do your injectors. He's quite intimate with the 502MPI system. LOl.

http://www.offshoreonly.com/forums/g...injectors.html

that's an understatement......................probably done more work on them than Mercury

01-27-2017 | 01:23 PM

#35

powermizer

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Also, someone mentioned stainless and inconel valves. Since these motors have been apart before how could I identify what kind of valves are in there now? I ask because I noticed a magnet does not stick to the bottom (valve) half of the exhaust valves, it will stick to the stem, and all over the intake.[/QUOTE]

That can be a hard thing to determine. Manley put a code on the stem, usually a letter and number. I have not seen a code chart to figure it out, but you can call maley to find out. That is if they are manley valves. I personally feel better changing valves if I am not sure of what they are. Nothing worse than dropping a head of a valve on a nice engine. Good insurance.