Need help with my 3.7l mcm 180

[The Begginer]

I have a mercruiser mcm 180 on an old boat our family had wich was neglected now i want to restore it but the engine is seized, can anyone help me find a rebuild kit ???

 

[nola mike]

Internals were the same as a Ford 460, so search for that

 

[matt167]

A seized 3.7L is a boat anchor, basically not rebuild able or worth it really.. It shares the cylinder head, rods and pistons from a Ford 460, and those parts are easy to get. BUT the camshaft and crankshaft are not standard parts and have not been manufactured since the very early 1990's

A 4.3L is the replacement just not a drop in, but a 165 inline 6 would also work.

 

[The Begginer]

So your telling me that if the camshaft and crankshaft are ok it is possible for a rebuilt and if it is is it worth it tho ???

 

[Bondo]

So your telling me that if the camshaft and crankshaft are ok it is possible for a rebuilt and if it is is it worth it tho ???

Ayuh,..... Welcome Aboard,..... Probably not,....

The most common part number for the 470 motors is NLA,....

 

[Scott Danforth]

The cost to rebuild a 470 motor is more than buying a much newer and reliable 4.3

 

[The Begginer]

A 470????

 

[The Begginer]

Before i try buying parts i just want to clarify so i wont be mistaken i have a 180hp engine with 224 cid thats a 3.7 right ????

 

[Bondo]

Ayuh,..... The handle given to the 3.7l motor has been the 470 for years,.....

 

[Scott Danforth]

Before i try buying parts i just want to clarify so i wont be mistaken i have a 180hp engine with 224 cid thats a 3.7 right ????

yes, same motor has output of 165, 170, 180 and 185. the later having the 4 barrel.

Mercruiser calls it a 470

however it is a mercruiser only cam, mercruiser only crank, mercruiser only block, a mercruiser only front damper, a ford FE head with a hole drilled in it, ford FE pistons and connecting connecting rods, a GM flywheel

so if parts are not available from Mercruiser, they are not available.

the reason the motor is frozen is most likely because it overheated and water was in the pistons when the motor was parked a long while ago. sitting neglected just makes things worst.

however prior to looking at the motor, make sure the drive is pulled in the event the drive is toast.

 

[nola mike]

So your telling me that if the camshaft and crankshaft are ok it is possible for a rebuilt and if it is is it worth it tho ???

The cost to rebuild a 470 motor is more than buying a much newer and reliable 4.3

You might only get another 30 years out of a rebuild.

 

[The Begginer]

Thanks for all the help, ill update you if i finish it

 

[The Begginer]

The cost to rebuild a 470 motor is more than buying a much newer and reliable 4.3

On second thought this might be a better idea i wanna know how can i buy a 4.3 engine and how much would it cost for the engine and shipping i live in the phillipines so that might be a problem thanks

 

[The Begginer]

But if it is hard to get one of those will this kit work although it is a v8

 

[matt167]

Cheaper to find another 470 if it comes to that

 

[Eric 3.7LX Alpha 1]

Couple of things.... first, if you haven't already, pull the outdrive off, it may be seized not the engine.

Don't order any internal engine parts if your going to rebuild it yet. You have to have it looked at first by a machine shop before you order things like main and rod bearings and piston rings. You have to have machine work done if necessary, first, in case over sized bearings/rings are needed. If machine work is needed, the shop will tell you what to order. Pull the plugs out next and see if it turns, then I'd pull the head off and see what it looks like in there before ordering anything.

 

[The Begginer]

Hey guys just talked with a friend and he says the engine might not be stuck instead it might be the water pump wich is connected to the engine through gears is that possible, thanks

 

[Scott Danforth]

Hey guys just talked with a friend and he says the engine might not be stuck instead it might be the water pump wich is connected to the engine through gears is that possible, thanks

No

 

[The Begginer]

No

So how can i check i just wanna be sure it has the correct amount of oil and it hasnt been overheated what should i try then ???

 

[The Begginer]

Couple of things.... first, if you haven't already, pull the outdrive off, it may be seized not the engine.

Don't order any internal engine parts if your going to rebuild it yet. You have to have it looked at first by a machine shop before you order things like main and rod bearings and piston rings. You have to have machine work done if necessary, first, in case over sized bearings/rings are needed. If machine work is needed, the shop will tell you what to order. Pull the plugs out next and see if it turns, then I'd pull the head off and see what it looks like in there before ordering anything.

Whay should i also do if its the outdrive wich is sezed srry if these are basic question this my first time with engines