Rebuilding My Mercruiser 5.7L Boat Engine

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With new parts and the previous videos I have made, I was able to toss this engine together quickly. This is a new (to me) 638 block that a machine shop had in stock for me. It is a 4 bolt main rather than 2 bolt main so that is a nice little upgrade. That, and the cam thrust cover was slightly different. They were easy fixed though and I reused all my top end parts after a thorough cleaning.
#Mercruiser #SBC #Chevy

Опубликовано:

12 сен 2024

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Комментарии : 41

@maggiekaltsulas841 2 года назад

It's been quite a process, but nice work keeping with it! 👏👏👏

@605BOLT 2 года назад

Always a chore.

@professionalmike4189 2 месяца назад

You should have bought some used vortec heads for that engine. Would have gave you an extra 20 horsepower on the stock engine

@605BOLT 2 месяца назад

It's true. I thought about it but my heads were still ok. But you're right and it was on my mind.

@isaiahkramer3610 2 года назад

Keep up the good work. I know the feeling, I rebuilt my Mercruiser 3.0L. Only things I can suggest is referring to the service manual for torque specs and adjustments. Are you going to run the motor outside the boat? I would highly recommend and its pretty simple to do, that way you can fix any oil leaks or other issues.

@605BOLT 2 года назад

Thank you for the encouragement. I actually have the engine back into the boat and it's good to go. This footage is about two months old. I did just what you said about running it out of the boat. It was nice to have that peace of mind. Idk if you can tell but I was pretty crabby when I was making these videos. 🤣 Really sucks to be working on a boat during summer as opposed to sitting on it haha.

@stefanosk2700 2 месяца назад

It is exactly the same Engine! 350 Magnum MerCruiser 5.7Lt Carburettor ... you can check the video in the 7:12 where 1 of the collars are not attached. this is the part i am talking about !

@stefanosk2700 2 месяца назад

After how many work hours ( years of use) did you open the engine? Are there any cracks or rust -corrosion on the inside of the engine block because of the salt water cooling system?

@605BOLT 2 месяца назад

Yeah, I understand. Which part you need now but I don't know what the part number is so that you can order one. That's what I need to look up.

@605BOLT 2 месяца назад

There is basically little corrosion in my engine because I only use it on freshwater. My boat never runs in saltwater. All the pieces that you see in my videos are I think original except for the manifolds.

@stefanosk2700 2 месяца назад

@@605BOLT oh freshwater is a different story

@stefanosk2700 2 месяца назад

Do you know if its possible to find a different style Thermostat Housing that will fit? of the same era of course

@kubaSWAT 2 года назад

Keep going great vids

@605BOLT 2 года назад

Appreciate you hanging with me and commenting! Been a process for sure.

@kubaSWAT 2 года назад

605BOLT wish to see some tutorials how to rebuilt your own 4.3... for newbies

@605BOLT 2 года назад

4.3 would be very similar. Just a few cylinders short. 👍

@kubaSWAT 2 года назад

605BOLT Yeah but how to use plasti gauge, cam Bearings etc... just the basic etc

@605BOLT 2 года назад

@@kubaSWAT I am actually working on a plastic gauge video for my next one haha. Cam bearings I have the machine shop do if they need any work. This block needed them so I had the machine shop install them and I also had the machine shop put the pistons on the rods. They require specific tools.

@Supanova70 15 дней назад

I hope that was a fresh water motor. No brass plugs any where.Maybe you used SS? What was the final cost? 4 k to the door at michigan Motorzs /long block/not sure if it`s wirth just getting it from them done.

@605BOLT 15 дней назад

@@Supanova70 fresh water. Final cost was 1500 plus gaskets the time I needed new pistons and block.

@Supanova70 15 дней назад

@@605BOLT that is crazy cheap

@605BOLT 15 дней назад

@@Supanova70 it was a couple years ago but yes. Couldn't even touch that price today.

@kennys3985 Год назад

can you go in more detail about the wiring. how do you know what wires go where? did you make notes before the rebuild?

@605BOLT Год назад

I'm sorry I can't due to this being like two years ago now. But I just carefully removed and labeled so that I could replace it all in the same spot. I have a few videos about timing this engine and installing it multiple times. You might be able to see what you need in those videos but my memory is too rusty.

@juanfbotero7422 4 месяца назад

Hi! I really thank you for this Playlist! I'm in the middle restoring a motor like this and i want to ask. Where did you bought the piston rod assembly? Do you still have that information?

@605BOLT 4 месяца назад

I reused the pistons and rods but you can easily get some stock aftermarket ones from places like jegs, summit racing, or speedway motors.

@juanfbotero7422 4 месяца назад

@@605BOLT ohh but in this video you show some piston/rod assemblys that you bougth preassembled I was wondering how did you fund them preassembled

@605BOLT 4 месяца назад

@@juanfbotero7422 I bought them direct from a machine shop. They had them on the shelf. They are oversized.030". The wrist pins are not slip fit on these so I had them install the wrist pins so I didn't have to mess with all that. Sorry I thought this was the engine before I let all the oil out lol. 🤦

@juanfbotero7422 4 месяца назад

@@605BOLT ohh I saw all that!, I hope that the boat is in perfect conditions for this summer!

@605BOLT 4 месяца назад

It was good to go all last summer. Don't call it a streak! haha

@strikeforcek9149 2 года назад

Did your old block have roller lifters and roller cam OR did it have Hydraulic/tappet lifters?

@605BOLT 2 года назад

It was roller and hydraulic. New engine too. I idle a lot so I didn't want to worry about wiping about a cam with a flat tappet lifter setup.

@strikeforcek9149 2 года назад

@@605BOLT yeah, that was kinda my thoughts too. Great choice

@pacthedoc4649 2 года назад

I don't like pistons... they always make my hands hurt after building a few hundred 😂

@605BOLT 2 года назад

A few hundred?! 8 was plenty for me haha. That sounds like full time work to me. Are you a builder or do you manufacture them?

@andrewgilbert6765 2 года назад

You had to replace the block?

@605BOLT 2 года назад

Ya. the main bearings had gotten enough heat in them that I chose to just get a new block rather than fixing what was there. It could have certainly been bored .030" over and had a line hone job done but I was able to find one that was ready to go already so it didn't really make sense to fix the one I had. I actually have it sitting on the scrap pile yet haha.

@natnix1 2 года назад

No brass freeze plugs?

@605BOLT 2 года назад

Ya it won't be in salt water at all so it should be good to go. The engine was already prepped to go into an automotive application so I just snagged it off their shelves. No biggie. I guess if they rust out, the engine will be coming out for a third time. hahaha