Time for new motor?

[HT32BSX115]

Re: Time for new motor?

Yeah that's SAT on the grad stuff but I could swing by on SUN if you like.....

The drive might not be completely frozen........but it may have gotten hot enough in there to warp some of the upper bearings enough to get them to be very hard to turn.

Reel poor - Super easy, I'm building one tonight.

Rick - I don't have time to mess with it until the weekend and I know you're busy with graduation festivities. I don't want to bother you until you have more free time.


I still don't see how the starter could turn the motor over and I can't with a wrench and socket. Wouldn't a frozen outdrive prevent anything from turning it??

 

[Coors]

Re: Time for new motor?

If the starter will spin it, you can by hand
The top 1/4 ' rust is where the rings stop.
how much difference is there?

 

[Reel Poor]

Re: Time for new motor?

Believe me, the starter can produce a lot more torque than you can with that wrench.

 

[BlowHo]

Re: Time for new motor?

Pictures of the bottom of one head and the gasket, a close up of a couple of the valves, and then tried to get a decent picture of the cylinders. The photo looks more orange than in real life. I soaked a rag in oil and wiped everything to prevent more rust and most of the stuff on top of the pistons was coming clean. There is some pitting in some of pistons.

I absolutely cannot get the engine to turn with wrench.

If it's the outdrive, why the low compression numbers?
The head gasket in the picture appears to be intact so no loss there as far as I can tell?
The starter was turning the motor, very slowly, would that affect compression numbers?

I have access to a good sandblaster so I'm gonna do the manifolds and riser. Can I also do the intake manifold or is getting all that grit everywhere make things worse. Common sense says don't do it, but thought I'd ask.


I will pull the outdrive if I have to but really don't want to take too much more apart just for the heck of it.

Thanks - Rick Sunday sounds good but don't put yourself out. I'm off on Mondays as well.

 

[Reel Poor]

Re: Time for new motor?

The starter was turning the motor, very slowly, would that affect compression numbers?

Yes, and drastically

I have access to a good sandblaster so I'm gonna do the manifolds and riser. Can I also do the intake manifold or is getting all that grit everywhere make things worse. Common sense says don't do it, but thought I's ask.

Just be sure to blow (compressed air) them out real well (don't forget the bolt holes) then flush with plenty water.

 

[BlowHo]

Re: Time for new motor?

So if it is the outdrive that is sticking, that would make my compression numbers low since the motor was turning too slow?

Oh well, the price of gaskets is cheap enough to make cleaning all of the rust off worthwhile.

I will pull the outdrive and see if the motor frees up.

I have started to browse for gasket sets to rebuild this thing, any reason why marine store sets are so incredibly expensive compared to the Ford 7.5L set from Summit. Let me guess, marine gaskets are super-duper, I will never have this boat in salt if that matters.


How do the pictures look? About normal or more corrosion than normal? While I have it apart I may as well replace everything possible. Any thought on what I should replace? I am on a budget.

Thanks for the help.

 

[HT32BSX115]

Re: Time for new motor?

Well from the pictures it didn't look all that bad.

Mine had water from a leaking riser gasket sitting in the cyls for a long time and it didn't affect the compression much at all! From the look of my cyls it had sat in one cyl for months... The engine still ran good. Well the flat cam did affect it a lot.

I got some 460 marine gaskets from NAPA ....You can probably also get gaskets from National Auto Parts. (by the way I still have a new set of valve cover gaskets for that 460 here too)

Didn't you say you have closed cooling? If so, I believe you can use regular Ford 460 head gaskets. (Use the marine intake gaskets from NAPA though so you'll have the exhaust cross-over blocked)

The important things to ensure that you get sealed well are the exhaust elbows/risers. Those have to be sealed perfectly.

So if it is the outdrive that is sticking, that would make my compression numbers low since the motor was turning too slow?

Oh well, the price of gaskets is cheap enough to make cleaning all of the rust off worthwhile.

I will pull the outdrive and see if the motor frees up.

I have started to browse for gasket sets to rebuild this thing, any reason why marine store sets are so incredibly expensive compared to the Ford 7.5L set from Summit. Let me guess, marine gaskets are super-duper, I will never have this boat in salt if that matters.


How do the pictures look? About normal or more corrosion than normal? While I have it apart I may as well replace everything possible. Any thought on what I should replace? I am on a budget.

Thanks for the help.

 

[BlowHo]

Re: Time for new motor?

OK- pulled the outdrive and still can't get the motor to turn. I am putting some serious force on the thing and it ain't budging. I had a box wrench on the nut with a cheater bar and I bent the wrench!

The out drive spins freely, there is some salt accumulation and it could stand some cleaning and seal replacement, but if the shaft spins freely does that mean it's not seized.


What is up with the motor?! When I first tried to spin it I saw the cam move a little and then it just froze up.

Any body got any ideas? Pull the motor and check the bottom end? Launch the whole shebang without plugs and make it a reef? Thanks.

 

[BlowHo]

Re: Time for new motor?

Anybody?

 

[superpop]

Re: Time for new motor?

Sounds like a spun bearing. I would pull the motor and have it completely gone through and rebuilt including new rings, bearings and seals. That way you know what you have and what you are working with. With the plugs out and the drive off you should be able to spin that motor easily with a socket wrench.

 

[BlowHo]

Re: Time for new motor?

But, the starter was cranking it BEFORE I started to dismantle it! Why would it all of a sudden freeze up just because I pulled the exhaust and intake manifolds??????

This doesn't make sense to me.

 

[Coors]

Re: Time for new motor?

Believe me, the starter can produce a lot more torque than you can with that wrench.

Try the starter again, with a good charged battery.

 

[HT32BSX115]

Re: Time for new motor?

Something in there has broken or was broken and finally separated.

I had an engine once that broke the crankshaft. It actually ran! but at some point when it finally separated it would have broken something else and the whole thing would have come apart.

It appears something like this has happened.

But, the starter was cranking it BEFORE I started to dismantle it! Why would it all of a sudden freeze up just because I pulled the exhaust and intake manifolds??????

This doesn't make sense to me.

 

[BlowHo]

Re: Time for new motor?

Is there a way to move it in reverse? Right now the bolt just loosens, I was hoping I could move it back a little and then try again.

I am trying everything to prevent pulling the motor since I don't have anything to pull it with.

Is there anything I am missing, have done wrong or forgot to do that might be causing this??????

 

[HT32BSX115]

Re: Time for new motor?

If you can't find a way to pull the engine, you're welcome to bring it over and we can pull it here. Once all the bolts and "stuff" is disconnected it's a fairly quick and easy thing to jerk it out. If you decide to take it to 410 machine to get it rebuilt, he's also got an overhead hoist and will pull it for you.

I think something has either come apart..... timing ears/broken chain, frozen lifter(which would destroy the cam ) Without looking I donno... once the heads are off compression and stuck valves are out of the picture....That leaves the rotating parts.

Everything in there should be very easy to turn..

 

[Coors]

Re: Time for new motor?

Get a strap wrench big enough to go around the outside of the balancer, and turn it backwards; if it was me, at this point, the engine would be on a stand.