Marine Power 5.7 engines

[theflyingspanner]

Hey Guys

So I'm faced with the task of removing the transmission of my 07 22ve to replace the flywheel due to a broken tooth .

As i live in the middle east access to marine power parts are are difficult to get! So does anybody know if I can replace the flywheel with the similar car/truck one? if so what year and model? As the engine is just a normal GM 350 ci I figure Marine Power won't have re-invented the 'fly'wheel.

[robert theisen]

I would doubt it.Dom or Chpthrill may know for sure.

[skippabcool]

How did you find out you were missing a tooth in the fly wheel or what led you to that?

[chpthril]

Id so no for a couple reasons. One, automotive engines are know to use a harmonic balancer of the front of the crank, where as a marine engine may use the fly wheel assembly to serve that purpose.2nd, that MP fly wheel assembly is also the coupler that link the crank to input shaft of the transmission. It acts as a dampener. So it its just not your plane typical toothed fly wheel you might see if you pulled the trany out of your C1500 pickup.

Good luck!

[theflyingspanner]

Thanks to everybody for your helpful answers, Chpthril you've already saved me a lot of hours with your electrical advise so I'd like to say a special thanks for that.

I have no idea when it happened, but just the other day when I was cranking suddenly the whole thing just froze, then when I went to try it again all I could hear was the starter go but not engage, so I then removed the starter to have a look and could see the missing tooth.

Anyway that's life! If by some miracle it does end up being at all the same as a regular automotive one then of course I'll post my findings for all to share! If not it looks like I'm in for some pretty expensive shipping.

[boatwakes]

Spanner, yes you can use an automotive flywheel, they as well as your marine engine are neutrally balanced, but here are some things to consider:
1) It's only the ring gear that is broken and you can replace that individually using heat and cold applied to old and new parts. If you choose to do this, the ring gear will have either 153 or 168 teeth and should also be measured from the outside edge of the gear for a total diameter of either 12.75" or 14" so you can order the correct part from anywhere auto or engine related on the internet.
2) When you remove the engine or transmission to access the flywheel, you will have to remove the drive plate which couples the engine to the trans and dissapates the shifting shock via springs on the circumference. It is mounted via 6 bolts with 9/16" heads. When you remount the drive plate (it's also good to replace it as you're already there), you MUST USE THREADLOCKER on those bolts and tighten to 35ft/lbs.
3) It is imperative you also determine where your starter is located; top mounted above the transmission or engine block mounted down low because this will determine where the ring gear is located on the flywheel and IF you can use an automotive replacement. If your starter is low and block mounted, you CAN use an automotive flywheel from a small block chevy VORTEC engine ONLY with manual transmission, NOT THE LS SERIES and no automatic transmission! If your starter is top mounted, the ring gear is farther aft on the flywheel and automotive engines do not incorporate this design, thus if you replace with an automotive flywheel, the starter will not engage.
4) When you reconnect the engine to the transmission, you must line up the splines on the trans input to the drive plate and the easiest way to do this is by manually rotating the engine with a socket wrench (5/8" socket) to line it up.
The multiple times we've done this, it has always been easiest to separate the trans from the bellhousing instead of separating the engine from the bellhousing when removing the engine. There are several individual problems you will incur during this project so PM me if you have specific questions and I'll answer ASAP. Good luck!

[theflyingspanner]

Boatwakes! wow now that's what i call a reply!

All very useful stuff you've given me there and no doubt you'll be hearing from me a good few times over the next week.

I was aware i might have been able to just replace the ring gear, as an aircraft engineer by trade I've done this regularly with Cessna's etc but wasn't sure if the same applied to automotive/marine engines. It's a top mounted starter so i guess it's my only option to replace the ring gear only.

Thank you so much for your help, you've already saved me hours of work!

[Gwyn]

would be worth calling rudi at RJP in Abu Dhabi he is very helpful !