My engine has 63,000 original but it has a few oil leaks. I have installed new oil cooler lines and now only the front cover and rear main seal leak a little now. Just a drop here and there when parked, but it drives me crazy! I have an oil absorbent rug under the Blazer on the floor of the garage because a drip here and there adds up over time.
I have taken two 1500 mile trips and I just needed to add a 1/4 of a quart of oil each time. I do see burnt oil on the exhaust pipe that goes under the engine from the wind blowing it back.
So I was thinking in the next year I may pull the engine to reseal it -OR- maybe install a new engine while I do all this work. I do NOT want a rebuilt engine as my engine is probably as good. I don't trust rebuilds. However I would entertain a NEW factory engine.
I see NEW Marine engines for sale. Would everything bolt up to it?
Here is an example for $2495: New GM Marine 4 3L 262 V6 Base Engine Mercruiser Replacement Years 1997 2007 | eBay






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New 4.3L/V6 Vortec Marine Base Engine

You are looking at a GM Marine factory New Vortec 4.3L/262 CI, V6 Base Marine Engine. These engines are 185HP with a 2bbl carburetor and 223hp with a 4bbl carburetor. This is a direct replacement for Volvo, OMC, Mercruiser, Crusader, and GM 4.3L engines years 1996 - 2007. Will repower to older applications with an electric fuel pump and new intake manifold.
This Package Includes:

• New block, heads, and all internal components
• New Valve covers
• New Timing cover
• New Marine Oil Pan
• New Harmonic Balancer
• One Year Parts & Labor Warranty

Engine Specifications:

• 1 Piece Rear Main Seal
• Standard Rotation (Left Hand Rotation)
• With its Vortec cylinder heads this 4.3 produces great power for the performance enthusiast.
• Peak torque is 268 lb-ft @ 2800 RPM while peak horsepower is 223 hp @ 4800 RPM
• Requires 8-Bolt Intake Manifold
• Requires an Electric Fuel Pump

 

I would think it would work as long as the rotation was correct. This was generally the main difference between automotive and marine engines. Sometimes the intake and exhaust manifolds where not comparable but this sounds like it would work,

 

I agree ^^^^ Better make sure before you order it.

 

Much cheaper to fix what you have. And the benefits may not be enough to justify it

 

I scare myself sometimes with the **** I remember
https://blazerforum.com/forum/engine...-blazer-61963/

 

this!!

 

marine engines run a different cam shaft as well as internal clearances are much wider as the engine runs under constant load. not a good choice for automotive use. try Jasper or another engine supplier if you want a good engine to replace yours

 

I have always had good luck with original GM Goodwrench crate engines. what could be better than a factory fresh direct replacement engine if all your looking for is stock factory performance. These are new engines not re manufactured. I also do not like to use them even though Jasper and a few others have good reputations. One thing they do have in their favor is they usually have longer warranties than original crate motors but then again you really never know who is actually rebuilding them and what quality of parts and workmanship you are getting. I will always go with a GM crate motor on a vehicle I intend to keep and use.

 

I agree with the GM Goodwrench Engines. I replaced both engine and transmission with GM Goodwrench replacements. I installed the Engine 12/03 with 318,760 miles on the odometer. The transmission was replaced 08/06 with 366,221 miles on the odometer. My Jimmy now has a little over 450,000 miles. So I have over 130,000 on the GM Goodwrench Longblock with no issues at all.