Exhaust riser plug hole threads

[MikDee]

Re: Exhaust riser plug hole threads

hmmm not the worst looking ones i've ever seen. If your going to try to save a few bucks and clean those up make sure you run a file over the mating surfaces to make sure they are true.

I agree with jason, they don't look that bad to me, I would get them cleaned as best you can, pressure test them however you can, and use them at least for the initial startup to see what you got.

Personally, the 1st thing I would do is take out the spark plugs, and put some Marvel Mystery oil (or any oil) into the cylinders, then put them back in, and let it sit while you did other external stuff, before you ever try to crank it over, then as Don said spin your oil pump over with an electric drill, just before you finally decide to try cranking it.

Don't get discouraged, you've got a nice boat, nothing is that hard to do on an I/O except replacing the starter most things may require some work, & moderately heavy lifting, and certain procedures to follow, but balancing a starter in one hand, while trying to catch a bolt with the other, laying under the engine at both arms length, is the worst,,, and sometimes it just has to be done.

 

[i386]

Re: Exhaust riser plug hole threads

Personally, the 1st thing I would do is take out the spark plugs, and put some Marvel Mystery oil (or any oil) into the cylinders, then put them back in, and let it sit while you did other external stuff

Excellent idea. Might as well let 'em soak a while. I have some PB Blaster. I was thinking about that very thing today at lunch while I was out and about buying brass plugs and a 1/4 NPT tap. So far I've got about $10 in this boat.

then as Don said spin your oil pump over with an electric drill, just before you finally decide to try cranking it.

Absolutely.

Don't get discouraged, you've got a nice boat, nothing is that hard to do on an I/O except replacing the starter most things may require some work, & moderately heavy lifting, and certain procedures to follow, but balancing a starter in one hand, while trying to catch a bolt with the other, laying under the engine at both arms length, is the worst,,, and sometimes it just has to be done.

It was a free boat, well as free as any boat can be. I'm just taking things one step at a time and proceeding with caution.

And yea, I noticed where the starter was. I was thinking to myself, damn I hope I never have to work on that bad boy!

Thanks!

 

[i386]

Re: Exhaust riser plug hole threads

My buddy at Wheelabrator wasn't able to look at the part today but he did see the pics and said "no problem". I was able to get the hole tapped out and we have good threads so that concern is over. They don't look great but they'll seal and let me test. I also pulled all the plugs and shot a healthy dose of PB Blaster in all 8 cyls. No rust on the plug tips. No stripped/cross threaded plugs thank God. I oiled the threads and put them back in finger tight. They were splitfire plugs. I think I'll put the recommended plugs back in when I replace them.

Also popped the cover over the fuel tank sender to see what I might be in for when it comes time to drain the tank. Doesn't look fun.

I found new aftermarket exhaust manifold/riser/gasket/faster complete kits for under $400, not the $1500 stuff I found first. If it runs, definitely getting those new parts on. I've yet to locate and price an intake manifold. I took a peek inside the valve covers through the oil fill ports. Not a speck of rust in there. The oil filter looks brand new too. Maybe he did an oil change right before he pulled all the drain plugs and hoses.

 

[MikDee]

Re: Exhaust riser plug hole threads

Just a note here, PB Blaster is a rust penetrating oil without much real lubricting qualities, and it will dry up, you might want to put Marvel Oil or Something equivalent an (upper cylinder lubricating oil, & penetrant) in there, even just any old kind of motor oil would do the trick.

Splitfire plugs Get rid of them! I tried them when they first came out in my 88' Monte Carlo SS, and there was a very slight improvement, BUT, the cons were, the engine would seem to run hot, and ping on the recommeded reg gas 87, or even 89 octane! Also the engine would also stay hot for an abnormal long time after shutdown. I don't know if they've changed since then but, they only had a few different heat ranges that were used "universally" for many different cars, the spark plug body was way bigger then my stock plugs, I took them out and returned them under their 30day money back garantee, and went back to my stock plugs.

This may be a good time to check, and or, replace your antisiphon valve, and any fuel tank inline filter.

Finally, I'd say your intake manifold is fine, aside from surface rust, it is cast iron, and I doubt there's much, if any rust on the internals of it, like most of the parts of your engine, just clean the externals till you're happy with it, and let the rest take care of itself, you'll be fine. Even your manifolds that had years of constant water running through them, and then left to the atmoshere, don't look that bad.