Volvo 350 seized

[PatinIdaho]

Ahh yeah i see it now. It has a 290 transom shield. With out better pics its pretty hard to tell anything else though.

 

[adamkat22]

hmm. i had a mechanic from a local marina come out at the end of the season to see if the outdrive seemed ok and they were referring to it as a 280? in any event...I guess what I was asking is if it matters what car/truck I pull the donor engine from. Seems like that engine was in tons of cars and I don't know if there is something better or worse I should be looking for (i.e. is the 350 out of a buick going to be the same as one out of a suburban?). i'm having trouble finding a list of all the trucks that used a 350 in 87-97...

 

[Bondo]

i'm having trouble finding a list of all the trucks that used a 350 in 87-97...

Ayuh,..... 1/2 ton, 3/4 ton, 'n 1 ton Chevy, 'n GMC pickups, vans, 'n cab, 'n chassis, built 'tween 87, 'n 95,....

The heads changed in '96, which is when the Vortecs came out,....

 

[adamkat22]

I'm slow to find a 350 in the '87-'91 range but can find newer ones. Auto mechanic friends
Are telling me it doesn't matter. Any reason using a newer (like '96+) will not work? Will the marinized parts off my current engine not swap over? Problem with mating it to the 280 outdrive?

 

[PatinIdaho]

Im really not sure but i think all you need is the proper size flywheel.

 

[adamkat22]

So if I take the flywheel from my old one and all the marinized parts they should fit on any 350? Mating it to the outdrive will be no problem?

 

[PatinIdaho]

I dunno. At some point GM changed the bolt pattern on the crankshaft for the flywheel

 

[adamkat22]

bond you have thoughts?

 

[Maclin]

You need the flywheel stuff to match the new engine, from a newer boat's driveline.

 

[adamkat22]

Looks like my donor engine options are something in the
Same vintage (87-91) with 180k+ miles on it or a 97 with vortex heads with (supposedly) 90k miles on it. Since I'm very new to all this I'm thinking the older engine will be simpler...and even though it may sh*t the bed sooner at least it will be a good learning experience

 

[adamkat22]

Or a 305 of the same vintage with 33k miles on it (but not sure if the 305 is interchangeable)

 

[Bondo]

(but not sure if the 305 is interchangeable)

Ayuh,... Externally, the 305 is exactly the same as a 350, from year to year,...

 

[72fj40]

87 and later chev V8's use a different flywheel than 87 and earlier. The pre 87 engines have a 2 piece rear main seal and the later 87's and up have a 1 piece rear main seal. 1 piece rear main seal engines are easy to ID, the rear seal is exposed on the back of the engine. If you have to purchase a new flywheel you will want 1 with the same tooth count and diameter, as the original. Bellhousing bolt patterns should be the same on 1piece & 2 piece main seal chev motors.

 

[PatinIdaho]

Here is where you will find your flywheel for either early or late 5.0-5.7
http://www.michiganmotorz.com/marine-parts-accessories-flywheels-c-32_44.html

If your going to run a truck long block in brackish water you will need brass freeze plugs, 140 degree thermostat, Marine head gaskets.
The truck cam shaft may work but there is going to be a chance of Revision= Engine sucking in water through the exhaust. So i would suggest a new marine camshaft also.

 

[adamkat22]

what is the 'windage tray'. i know that is something that is supposed to get swapped from my current engine onto the truck block but don't know what it is. thanks

 

[Maclin]

Windage tray is between the block and the oil pan. Purpose is to deflect turbulance generated at higher rpm's from the crankshaft to keep oil less likely to foam.

 

[adamkat22]

just wanted to let you know that after a MAJOR learning curve and lots of internet research and help from old friends as well as new friends i met along the way i end ed up swapping the engine with a truck block and took it for its first test spin this weekend. the old block was definitely seized up with rust once i had it taken apart and could see inside. thanks for everyone from this forum who helped out along the way. was a long journey...