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Old 07-13-2018, 10:11 PM   #1
Marz
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1995 SC2
Default SC2 going to swap with junkyard engine

So a couple months ago my '95 SC2 started sending out a blue smoke screen and lost power when accelerating from a stop. I looked under the hood and found oil leaking between exhaust manifold and the engine block centered between the second and third exhaust ports.

I got another car to get to work, but want to keep the SC2 and fixer back up. There's a pick N pull down the road that has a DOHC engine pulled from a wrecked car, with damaged valve and timing covers both of which I can pull from the engine in the car now. It's cheap enough that I think it would be worth it have even if ends up being spare parts...

I am hoping to get some advice on things to check or do with the junkyard engine before swapping out the that's leaking oil. (I plan to keep the original engine and rebuild it, maybe do a Deeb's build to it. Depends what's wrong with it.) I'll try to document i.e. photograph/video my work here.

...
1995 SC2 Purchased with 119985 miles

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Old 07-14-2018, 11:18 AM   #2
Marz
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1995 SC2
Default Re: SC2 going to swap with junkyard engine

I've uploaded a pic of the oil leaking from the front of the engine, if anyone has an opinion on what the cause may be, please share.

...Boo, I haven't posted enough to add links to images in my posts, so if you'd like click on my photos

<--------- There somewhere

...
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Old 07-14-2018, 12:07 PM   #3
cgg17
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1995 SL2
1999 SL2
Default Re: SC2 going to swap with junkyard engine

There may be issues with the third gen engine in a second gen car (albeit first gen body with second gen computer).

...
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Old 07-14-2018, 03:09 PM   #4
Marz
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1995 SC2
Default Re: SC2 going to swap with junkyard engine

The swap engine is also a '95 so there shouldn't be any problems with the computer

...
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Old 07-15-2018, 09:41 AM   #5
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1995 SC2
Default Re: SC2 going to swap with junkyard engine

Quote:
Originally Posted by Marz View Post
So a couple months ago my '95 SC2 started sending out a blue smoke screen and lost power when accelerating from a stop. I looked under the hood and found oil leaking between exhaust manifold and the engine block centered between the second and third exhaust ports.

I got another car to get to work, but want to keep the SC2 and fixer back up. There's a pick N pull down the road that has a DOHC engine pulled from a wrecked car, with damaged valve and timing covers both of which I can pull from the engine in the car now. It's cheap enough that I think it would be worth it have even if ends up being spare parts...

I am hoping to get some advice on things to check or do with the junkyard engine before swapping out the that's leaking oil. (I plan to keep the original engine and rebuild it, maybe do a Deeb's build to it. Depends what's wrong with it.) I'll try to document i.e. photograph/video my work here.
Replacement engine assemblies MUST be from another 1995 model ONLY.

1996-1997 engines will fit, BUT require the head to be drilled for the second coolant sensor for OBD-I systems as well as require swapping the fuel rail assembly.

With automatic transmission, the engine can be pulled by itself out the top. You will have to pull the harmonic balancer pulley to get the clearance.

If the car is a 5-speed manual, you will be pulling both your engine and transmission still bolted together, out the top.

As far as the engine you are rebuilding, when you pull the head, check the head gasket on the intake side of the block, at the #4 cylinder water jacket. DOHCs develop a hairline crack in the gasket, which will cause a very(almost unoticeable) small coolant leak down the backside of the block, below the intake manifold(which get boiled off by the hot engine surfaces, hence why you won't have a puddle under the car.

Check the valves, as you had a leaking exhaust manifold gasket, which means you likely have a burnt valve in your #3 cylinder, a blown head gasket, or worse: a scored block cylinder sleeve.

As far as the JY engine, if the car will start, check the oil level and run the engine. With a cracked timing cover/valve cover, the oil level likely got low. Bearing failure is going to likely make itself known, if this is the case.

Check the area of the block, to the right of the coil pack assembly. The last 9 digits of the VIN is stamped into each block. This will tell you if it is the original engine or it has already been replaced by the P.O. before it was junked. This will also determine if the mileage on it is accurate.

IF the engine runs well and isn't noisey from the cam bearings/rod bearings, make sure to pull the exhaust manifold and check the valves for build up on the stems. This is indicative that the valve stem seals are leaking, which can happen when the oil level is too low for too long, on any engine.

Check the same area, under the intake manifold, for the coolant leak I above mentioned.

I have already gone through the process of changing my engine assembly. It took me 14 hours, and my replacement engine(as well as the blown stock engine) BOTH had the crack in the head gasket at the #4 cylinder intake water jacket area, and both showed signs of leaking coolant down the back of the block. They both had the exact sake crack in the exact same area of the gasket.

Make sure the exhaust system is sealed with new gaskets and fix any leaking areas, as the exhaust leaks are what lead to burnt valves.

...
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"He checks the gas, and fills the oil....."

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Old 07-17-2018, 07:10 PM   #6
Marz
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1995 SC2
Default Re: SC2 going to swap with junkyard engine

Thanks for the info!

I just picked up an engine hoist and need to finish draining the fluids from the engine in the car...

The temps here are over 100F and work keeps getting in the way!

...
1995 SC2 Purchased with 119985 miles

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