Cylinder Sleeving

[calwldlif]

Hello all<br /> I am curious about "XXXXXXXX"<br />"Sleeving" a marine block.<br /> I have heard you can't do it.<br />I would like peoples opinions on the<br />possibilty of boring out a cyl to be<br />sleaved back to OEM sizing.<br />Thanks

 

[searay3]

Re: Cylinder Sleeving

Sleaved blocks are designed to take sleeves. There are seals and design considerations. strength of the block in the sleeved area etc. Don't know if you even have enough material to bore a block for sleeves....

 

[lilmandavis]

Re: Cylinder Sleeving

is it a diesel? then i wouldnt even think about it. i sleaved a 454 once but the block was filled and it had a blower on it and ran no coolant..i posted a link on a new engine for you on your other post on how much a engine would cost. i would advise that. 'edit' that was on halflifes post. what engine is it

 

[Bondo]

Re: Cylinder Sleeving

Engine Blocks are Salvaged Everyday using Sleeving.....But,... Usually for Rare or otherwise Unobtainable Blocks........<br /><br />What'd ya have in Mind,..????<br /><br />I think Searay is talking about Some Diesels that are Designed to be Sleeved,.. Either with Wet sleeves,.. or Dry Sleeves.......<br /><br />But, Any Block Can be sleeved......

 

[Mile-High Mariner]

Re: Cylinder Sleeving

The word, gentlemen, is SLEEVING. If a block can be SLEEVED, then you might want to SLEEVE it, but spell the dang word correctly!!!

 

[calwldlif]

Re: Cylinder Sleeving

HMmm;<br />Well guys it was more of an<br />ingeneral type question.<br />Whether there was something inherent<br />in the marine use that frowned on<br />sleEving a cyl. <br /> Some years ago I toyed with redoing<br />a volvo aq170b straight 6cyl.<br />there are oversize pistons available<br />I think upto @ +.090 (all pistons were major bucks)<br />I asked the marine guy I was seeing (quite regularly) if I could sleEve the motor and <br />save some money by not buying new pistons.<br />He told me NO, marine rpms , yada yada yada.<br />I have in the past had auto motors sleEved, understand wall thickness mins , ect.<br />I know the auto industry is using motors that<br />are sleaved by design.<br />I never quite agreed with the "Guy" but, I don't<br />have any experience in the marine (raw water)<br />sleEving process.<br />I find there are quite a few well versed people<br />here and thought I would get a better understanding about it so I can make better<br />decisions if the need arises.<br /> Thanks

 

[Mile-High Mariner]

Re: Cylinder Sleeving

There are many auto engines that run at higher rpm than marine engines, but the consistency at which a marine engine runs flat-out is the differentiating factor. Multi-gear transmissions allow cars to go fast at lower rpm, but, having only the throttle to control speed, marine motors must generate high rpm in order to go fast. This is probably the most inefficient way to transmit power to the water, as the marine engines are all out of their optimum power band at high rpm, but the need to save weight (and complexity) has dictated single-speed drives in boats to date.<br /><br />Variable-pitch props make a dent in the single-speed dilemma, but it seems like a two-speed transmission shouldn't be that hard to come up with. I was at Camping World yesterday, looking for some parts for my RV, and I saw an overdrive/underdrive unit that might present a possible, very intriguing solution.....

 

[Bondo]

Re: Cylinder Sleeving

Originally posted by Mile High Mariner:<br /> The word, gentlemen, is SLEEVING. If a block can be SLEEVED, then you might want to SLEEVE it, but spell the dang word correctly!!!

Better,..???....

 

[Mile-High Mariner]

Re: Cylinder Sleeving

Uh-huh - SeaRay got it right at the end of his post. How are you, up to no good, there, Bondo? My motor's in pieces on the bench right now - if you have any good suggestions to add to the reman/upgrade, add them to the post "question 4 mile high mariner".<br /><br />Have a great weekend, old man!

 

[calwldlif]

Re: Cylinder Sleeving

Were not talking about<br />SHIRTS?<br />I messed up, must be all the shirts<br />off my back lately

 

[whywhyzed]

Re: Cylinder Sleeving

Volvo B30 blocks would be easy enough to find I would think...<br />What Bondo said about rare and unobtainable...

 

[waterdog85170]

Re: Cylinder Sleeving

related but different, i have had a powerhead for a 115 merc o/b sleeved and had no problems with it. and let me tell ya, that motor sure likes to rev!

 

[lilmandavis]

Re: Cylinder Sleeving

all aluminum blocks are sleEved, arent they? if the block was that bad id get another one. thats all i was saying. im not to knowledgeable about gasoline steel block sleeves! unless its onobtainable like bondo said.

 

[Mile-High Mariner]

Re: Cylinder Sleeving

lilman - short blocks for your application shouldn't be that hard to find - I'd do like you're thinking and replace the block before I'd have mine sleeved (I caught that big E!), especially since you have to have the motor gutted in order to sleeve it, anyway. It'll be better to have the peace of mind, too.

 

[lilmandavis]

Re: Cylinder Sleeving

hey! this aint my thread i was just commenting on it lol! id like to learn more about it though. i used to work in a machine welding shop and we would chop into blocks for fun. we used to take motor cycle jugs and bore em out. we would then install a sleeve that we coated with a super hard spray weld. that kept the thing together when we ran the turbo blue through it !! there was so much machining involved it almost wasnt worth it. but the 250 never ever ran like that! we also filled a big block. hogged out the cylinders and did the same. that thing lasted a long time. sounded like hell when it was cold but when it was warmed up i bet it was up over 800 hp. we ran it on alcohol and was puffin through a blower.

 

[Buttanic]

Re: Cylinder Sleeving

I had one cylinder sleeved 1n a 1975 120 Mercruiser. Never had a problem with it.

 

[calwldlif]

Re: Cylinder Sleeving

Thanks Buttanic, good to know