okay I got a 455 today .just wanting to know if the heads are worth saving ( Ka ) baged, it came from a boat and they built it up from the paper work found in the boat I am going to see if the guy will let me have the paper work it didnt think to ask if I could have it when i grabbed the motor. pulled intake off heads and block look newer / rebuilt no carbon build up but block has a few cracks from water freezing (396021Fa ) my hopes are to find a block and use these internals

cam crower 284 hdp
just wondering the foarms opions thanks justin

 

Ka's are excellent heads. Big valves too.

 

Cool! I've picked up at least three boat motors with cracked blocks. Its easy to forget to drain the blocks in the fall, winter freezes and that's all she wrote!

They used manual transmission flywheels on boat motors... so if your able snag that too! Since all the use it has is the starter turning the ring gear the face of the flywheel is like new.

I'm suspect you can find one closer, but I do have extra blocks if you strike out.

John

 

He kept fly wheel stater and the lifters it's kinda sad the block was redone three years ago bored 30 over if the paper work is correct I am planning on getting head checked out but not sure if I will use the cam from what I read it will just kill my rear end and two speed trans lol

 

Yeah picking is slim Hear people seem to think they are gold I found a 74 with j head completely tore down with that sat out side for a year and he wanted 300.00 offered 100.00 and he still had it hoping I can talk some since into him but if not I might be interest to see what one would cost From you John

 

If you haven't completely torn it down yet, you might check out the pistons. Depending on how many trips he made to the lake you might have a nice rotating assembly there

John

 

That's my plans two cylinders have some rust but you can still see the cross eching on the walls and two. Water ports are full of sand not sure if he ran into a bank or what


Are the distribitor different in boats ? It looks odd to me

 

It may be something aftermarket. But the distributor should be the same and interchange just fine. I remember getting one once that had been run in salt water on a jet boat. The exhaust ports were incredibly corroded! But your location should be lakes and maybe rivers so I'd expect it to be a treasure trove of parts.

John

 

086B57B0-D402-49E4-B31C-D98358992D64-28368-000016EC9091A022.jpg

Yeah he gave me accell high out put coil too this just looks off to me

 

Well... I'd say its an aftermarket HEI setup looking at the plug. Any tag on it anywhere?

 

Pulled cap off the module reads Mallory And the contacts look new lol

 

Treasure Found!

John

 

Lol wife was so mad that I brought this home told her its worth something look what I got m t valve covers nice shape Mallory dis looks odd but will figure that out accel high out put coil and ka heads and crower cam maybe there is gold in them after all lol

 

Pic of block

5EF0D2D3-20CE-42FA-9A89-96A1619A94DA-28800-000017229B588AAF.jpg
0A6FA730-7DA7-41FC-B3E0-131561426F89-28800-00001722A65DB427.jpg
761691C2-1B35-4D83-AB64-D4F5A340E4D8-28800-00001722B04E4843.jpg1CAF6342-787E-4E5B-BB29-7A555A450AFA-28800-00001722BB5FB866.jpg
The right bank is where the block cracked

 

Got any pics of the crank? You already know the block is toast, but the low compression pistons aren't worth using even if they are good. Make sure to keep the oil fill tube baffle, oil galley plugs, etc. Those are all things you can never have too many of

 

No pics of crank yet have not got oil pan off yet to pull bottOm end apart hear are cam heads and intake tho
2DB9A47A-3284-4DC0-B951-8EB88F938C13-28878-0000172C34899DE0.jpg
FEF54632-066F-437E-80C6-F22345FB521E-28878-0000172C4CBEC799.jpgCF196483-9391-4A5F-8739-E0E2FA1D1A94-28878-0000172C5824665F.jpg61290A68-D0FB-41DE-AC15-887F91EB1DBB-28878-0000172C62B261AA.jpg9AA0FF8C-92B4-4351-B850-A220B441F491-28878-0000172C6C4552B7.jpg

 

So they are low compression positions darn was hoping they were useable I take it the high compression ones have no dish ?

 

Well, they aren't factory pistons so they can't be identified by the "V" or rounded notches. Unless I just can't see them in the picture...but looking at the dish they look like low compression pistons. The high compression pistons have a really small dish in them.

 

I believe on the edge they have two notices next to each other if the helps

 

My machinist called my old low comp pistons "cereal bowls". They looked a lot like yours. My replacements have an 18CC. dish, but with a little additional milling, and decking, I calc. at 9.65:1. Plenty good for my weekend cruiser.

 

Here are some of the factory style replacement pistons available for 455. The pictures will give you an idea of what the differences are for high and low compression pistons.

High compression:

http://www.kb-silvolite.com/silv-o-l...tails&S_id=294

Low compression:

http://www.kb-silvolite.com/silv-o-l...tails&S_id=293

 

Thanks I would have to say low compression

 

Washed the heads today getting ready to go out to get checked look pretty good couple valves had rust don't look real bad

8FB475D3-1043-41F7-8D47-4CF38A7BB5A7-30606-0000189BFFC68305.jpg
BDA8947C-E228-4DD9-B039-64AFAF48C8CB-30606-0000189C09F7C1DB.jpg

 

Got the oil pan off and snapped a few pics
892705EA-DFEE-4DE6-9DC2-0E4578E22D59-39575-0000208968C57BB2.jpg
22CCA5C5-83DC-463A-A660-AE62F26ED8E7-39575-0000208974D3685B.jpg
worEBB032D8-EB23-41C1-8002-76D63A8F02A3-39575-0000208BBF7280A3.jpg
Looks pretty clean

So if any one can answer this is there adifference in the rods from auto to marine engine I read that there is what are the pro and cons of using marine rods ??


Thanks for all the help and great info from every one

 

What is wrong with the #1 counter weight? I see one hole that looks REALLY deep and another spot that looks like it was damaged.

 

Yeah.....the bottom hole looks like someone tried to drill it with a hand drill. The top looks like someone hit it with a hammer and chisel.

 

Too me it looks like they melted it and one hole looks like the added metal if the makes any sense

 

FA741E22-68B2-4A43-802E-1D69FE89E26E-39575-0000208FCA5D37F2.jpg
C27C5BDA-2C6E-472B-A640-6F5FDC7D1947-39575-0000208FC099FCC6.jpg
E27C1AFF-67EB-421E-B47A-5051D45EEA8C-39575-0000208F63AC27A4.jpg
I thought they did it to balance but I don't know much about internals build up very well

 

hey old stata

curiousity question how deep is the dish in those pistons in mm or inches ? its hard to tell from the pics

 

5/16 of a inch

 

thats deep

thats about the .320 8.4:1 comp pistons pilot linked to above, I am just tryingto figure what I have....I gotta go run out to the garage now

thanks

 

I think I might have enough sand to build a castle with my kids it just kept pooring out of the water jackets even a chunk if glass don't know where they went boating but man the must of loved the beach

 

That is what they did...the other pictures make it clearer. However, I thought they used a mallory plug...that looks like lead was poured into it. And why it's beat up is new to me...

Maybe Mark will know

 

Yeah the one that looks beat up looks like lead as well sorry my I phone don't take the best pics it looks like they tryed to smooth it with a stick ?

Over all all the bearings looked good I could still read the ink on them Hopefully the crank and rods are useable Not really sure what pistons to use all the ones I been looking at are expensive 😱

 

That looks like a Mallory Unilite distributor. I can do a few different 455 engines as well. lemoldsnut@aol.com I am in Redmond, Oregon