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Friend of mine got ahold of a rebuilt EJ251 out of a 2001 automatic forester, was done by a subaru specialist in new york and only has 22,000 miles on it. It is about 700 bucks and the labor is going to be cheap because friend rate so i am going to be buying it.

Question is...what will i have to swap over from my EJ 252 block/head to make a 251 work in a 2001 manual outback? it is coming out of a 2001 automatic forester. My current motor has 270,000 miles on it. He has a new flywheel from a project engine he's going to throw in for free, i am going to put in a brand new clutch at the same time as well.

AFAIK the parts i have to swap are the cam gears, water pump, intake manifold, and the sensors on said manifold. We will be using my accessories since they are fairly new parts according to the maintence records.
 

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On the Super Mod Squad
2002 3.0 VDC Wag + 2018 2.5 Leg Ltd
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26,486 Posts
do able. classically you should put them side by side to start swapping everything over properly and not miss anything.

if it does not have a Aisin or a OEM timing belt kit (and water pump)

buy new..

the Gates/Beck/etc. etc. have all become chinese junk in american boxes. (and the timing components have been known to crap out at 30,000 miles)

and please name the builder in NY.
 

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2005 OBXT Limited, VF37, STI intake, 5MT
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1,578 Posts
You'll need to keep your intake manifold and above (wiring, injectors, TB, etc). When transferring, just unplug the several connectors that attach to engine sensors (knock, coolant temp, gauge sender, cam/crank sensors) and leave the harness attached to the intake. Pretty easy.

While the engine's out, check for rear main and separator plate leakage. If you have the black plastic separator plate, get the kit from the dealer and replace it (new, metal design).

Think about changing the head gaskets, valve cover gaskets, and checking/adjusting the valve lash while it's out.

Check the trans input snout for grooving/heavy wear.
 

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Premium Member
2001 VDC/SC One of a Kind
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14,788 Posts
Yes. I read it quick. You're installing an auto in to a manual. You need the manual gear and sensor on the auto engine. Along with the guide over the crank gear.
 

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2012 STI, 2007 Impreza RS
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146 Posts
You need to change the crankshaft timing gear and the driver side cam gear. No sensors need to be changed. And the timing belt retainer(for manuals) as mentioned.
And also use the intake manifold off the Outback (as mentioned)
 
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