1986 volvo capri block questions

[inigo]

Hello,
New boat owner and I am quickly learning the "joys" of owning a boat.

I got a great deal on a boat, or so I thought, until I took it to the water to check it.

Vegas boat moved to Utah and the previous owner did not drain the lower engine. Needless to say, I need a new block.

Now, I am a little sadistic and decided I would make apple juice out of spoiled apples. That brings me to the point, (finally).

I have found a few blocks but, from what I have been told from the boat shops, the '86 has full rear seal main, this came into play starting in 1986.

As my luck would have it all the blocks I have run across so far are 1985 or newer.

So I need some help understanding the difference and if I took the '85 block and put everything from the '86 in it. Will it work or will I get vibrations and possibly destroy any feeble attempts I am making.

Thanks in advance and please understand, as far as rebuilding this will be a first for me. I have done a top end rebuild but nothing this extensive.

 

[captmello]

Re: 1986 volvo capri block questions

I've never heard of a main seal issue on the volvo's and will follow your thread to learn more about that.

If you use a car engine, you'll have to swap out the camshaft and all the marine specific equipment. Its been done, however I haven't done it myself.

Good luck!!

 

[Bondo]

Re: 1986 volvo capri block questions

I've never heard of a main seal issue on the volvo's and will follow your thread to learn more about that.

Ayuh,... Welcome Aboard inigo,... Your Info's abit thin,...

I Think you're saying it has a V8 Chevy motor with a 2 piece rear main seal,+ you're only finding SBCs with 1 piece rear main seals...
Am I close,..??

If so,... There's Awhole lot more to than just taking the parts Out of the junk block,+ putting them into a Different block...
If you're never done it, it's Best left to a Machine Shop...

Tell Us more about your dilemma,+ We'll see how We can help ya out...

 

[captmello]

Re: 1986 volvo capri block questions

Ayuh,... Welcome Aboard inigo,... Your Info's abit thin,...

I Think you're saying it has a V8 Chevy motor with a 2 piece rear main seal,+ you're only finding SBCs with 1 piece rear main seals...
Am I close,..??

If so,... There's Awhole lot more to than just taking the parts Out of the junk block,+ putting them into a Different block...
If you're never done it, it's Best left to a Machine Shop...

Tell Us more about your dilemma,+ We'll see how We can help ya out...

Good Point Bondo, I don't know why, but I was thinking the poster had a volvo 4 cylinder.

 

[inigo]

Re: 1986 volvo capri block questions

Thanks for the fast responses, this is really driving me crazy. Sorry if I am missing info, learning curve, my boat is an 1986 20.5' carpi with a 225e motor.

From what I have read the chevy '86 v-8 block was a transition year.

Chevy went from a 2 piece seal to a one piece seal. Mine is a 1 peice main seal.

The issue I am concerned about is the balance on the camshaft, if that makes sense.

I have found a number of adaptor kits out there but I am not sure if they will work.

Everyone says check the block numbers, which I will, I was just looking for more info.

As for a shop, I could, but this is somewhat of a project at this time. I can get a block and rebuild kit for a reasonable price and want to learn it anyway.

 

[captmello]

Re: 1986 volvo capri block questions

Thanks for the fast responses, this is really driving me crazy. Sorry if I am missing info, learning curve, my boat is an 1986 20.5' carpi with a 225e motor.

From what I have read the chevy '86 v-8 block was a transition year.

Chevy went from a 2 piece seal to a one piece seal. Mine is a 1 peice main seal.

The issue I am concerned about is the balance on the camshaft, if that makes sense.

I have found a number of adapter kits from 1 to 2 but it is looking more and more like I can't go the other way.

Everyone says check the block numbers, which I will, I was just looking for more info.

Well that makes sense. aq225e is a 305 chevy. Like you've been told, you need to check the casting numbers on your block to confirm what you have.

Fwiw, many would take this opportunity to upgrade to a 350. All your parts will bolt right up.

 

[captmello]

Re: 1986 volvo capri block questions

Check this link It will help you with the casting number.

http://www.mortec.com/castnum.htm

 

[Don S]

Re: 1986 volvo capri block questions

The 225E shows a 1 piece seal in the Volvo parts program.
Have a look just above your original post and click on Volvo Penta Parts, then just follow the links.

 

[Bondo]

Re: 1986 volvo capri block questions

Chevy went from a 2 piece seal to a one piece seal. Mine is a 1 peice main seal.

The issue I am concerned about is the balance on the camshaft, if that makes sense.

I have found a number of adaptor kits out there but I am not sure if they will work.

As for a shop, I could, but this is somewhat of a project at this time. I can get a block and rebuild kit for a reasonable price and want to learn it anyway.

Ayuh,... As long as you've got the 1 piece rear main,... No Problem, Any SBC block up to current production will interchange...

No,... Your Cam Balance statement makes Absolutely No Sense...

No,... You don't need any Adapters...

And, again, No, you don't seem to understand that Any used block will need Machine work to be rebuilt with the New engine Kit...

A Brand New SBC long block from GM can be had for about $1500. or so...
Only Slightly more than the cost of rebuilding your pile of parts...

Lastly,.... I'm with Capt. Mello,... Stepping up to the 350 is a No Brainer,... Same price, equals Free Horsepower...

 

[inigo]

Re: 1986 volvo capri block questions

thanks for the slap up side the head, after reading around a 350 is a dang cheap engine, a rebuild on a 305 would be roughly 1k,(re-bore, kit, valve job) with machine work and parts. You are both right, why not just get the bigger engine and spend about the same?

As for Balancing, I guess this is what I was referring to:

"With "internally balanced" engines, the counterweights themselves handle the job of offsetting the reciprocating mass of the pistons and rods. "Externally balanced" engines, on the other hand, have additional counterweights on the flywheel and/or harmonic damper to assist the crankshaft in maintaining balance. Some engines have to be externally balanced because there isn?t enough clearance inside the crankcase to handle counterweights of sufficient size to balance the engine. This is true of engines with longer strokes and/or large displacements.

If you?re rebuilding an engine that is internally balanced, the flywheel and damper have no effect on engine balance and can be balanced separately. But with externally balanced engines, the flywheel and damper must be mounted on the crank prior to balancing.

Customers should be told what type of engine balance they have (internal or external), and warned about indexing the position of the flywheel if they have to remove it later for resurfacing. Owners of externally balanced engines should also be warned about installing different flywheels or harmonic dampers and how it can upset balance."

I hope this brings to light why I would be asking these crazy questions.

Thanks again,
Inigo

 

[mkast]

Re: 1986 volvo capri block questions

Flywheels will only bolt on the crankshaft one way, the bolt pattern is staggered.

 

[Bondo]

Re: 1986 volvo capri block questions

Ayuh,... Chevy hasn't built an externally balanced SBC since the 70s,...
You needn't worry about that particular trait...
And,.. as noted,..
Flywheels,+ dampers are indexed,+ only fit 1 way...

 

[inigo]

Re: 1986 volvo capri block questions

ok guys,
long time no hear, but hey it's winter here so what's rush. Anyway, I pulled the 305 and it is going to make someone a good anchor. So I am taking some advice and I want to put a 350 in the boat.

Now I have to ask, what should be my concerns about the outdrive, the boat is 2 hrs away and, yes, I should write these things down, but, I am 99% sure it is a 275 outdrive.

Can someone give me some input, will the outdrive be able to handle the increased HP from the 350.

Be gentle, I am still in training here.

 

[bruceb58]

Re: 1986 volvo capri block questions

You have a Volvo drive so it will handle the 350. That same exact drive is used for 350s.