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Guest Message by DevFuse
 

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2.5 xt heads on a 2.0 wrx block


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13 replies to this topic

#1 immulmen

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Posted 20 March 2017 - 03:20 PM

A friend has a Forester 2.5XT and need a short block. He has found a WRX parts car and wants to know if the 2.0 block will work with his heads. I tried to serch the forum but could not find anything.

 



#2 GeneralDisorder

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Posted 20 March 2017 - 04:04 PM

Yes but it's never done so no one is going to be able to tell you what thickness HG to use.....

That's a terrible idea. The 2.0 isn't that good of an engine. It's open deck, etc.

Just rebuild the 2.5 he has or find a used block. It's not that difficult.

GD

#3 AdventureSubaru

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Posted 20 March 2017 - 04:31 PM

car-part.com for a used motor. Far better option.



#4 86BRATMAN

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Posted 20 March 2017 - 06:45 PM

Horrid idea, the ej20 has a 92mm bore. Depending on what year FXT it is the heads will either have a 97 or 99mm wide combustion chamber. It would run, but not for very long. The overhang of the chamber would cause a high tendency for hot spots and detonation.

The good news is the same longblock can be found in other models like the wrx, sti, and legacy gt. The year of the FXT would be needed to determine what years of the other cars to search for an engine from.

#5 WoodsWagon

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Posted 21 March 2017 - 02:55 AM

Or buy a brand new shortblock from the dealer and slap your heads on that. They're around $2k.



#6 wtdash

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Posted 21 March 2017 - 01:19 PM

car-part.com for a used motor. Far better option.

No offense - really. But this turbo- addict doesn't care much for USED Subaru turbo'd engines.

 

If you've got maintenance history from new, and knew how it was driven - maybe I'd take a chance.



#7 GeneralDisorder

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Posted 21 March 2017 - 04:37 PM

Yeah used turbo engines = bad day, lost money, etc. Sometimes we get JDM 2.0 liter engines for people on strict budget limitations but that's as used as we go. We get compression numbers on the ones we buy and a look under the valve cover. I'm treated differently by used parts suppliers than the general public also - they want my return business as we buy usually several engines a month for various applications.

GD

#8 wtdash

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Posted 21 March 2017 - 05:40 PM

GD,

We get compression numbers on the ones we buy and a look under the valve cover.

If you care to share a Shop Secret, What are you looking for under the VCs?

 

Thanks

TD



#9 86BRATMAN

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Posted 21 March 2017 - 08:47 PM

You'd be looking at the oil for metal shavings, darkness of the oil, and color of the head parts. If an engine has been well maintained the aluminum of the head will have an almost gold color to it. Darker colors indicate prolonged oil changes. You can also look at the cams and caps for signs of discoloration from overheating.

#10 GeneralDisorder

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Posted 21 March 2017 - 10:00 PM

GD,

If you care to share a Shop Secret, What are you looking for under the VCs?
 
Thanks
TD


Sure - looking to see the color and thickness of the "varnish" inside the engine. Engines run with full synthetic, for example, usually look new with virtually no varnish even after 200k miles. Engines run with non synthetic that's been changed regularly usually have a light carmel color with some darker streaks. Engines that have had infrequent, poor quality oil changes will be black. Really nasty overheated engines will look like a BBQ pit with congealed sludge hanging off things.

GD

#11 wtdash

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Posted 21 March 2017 - 10:18 PM

double-post...dang newbs.

 


Edited by wtdash, 21 March 2017 - 10:21 PM.


#12 wtdash

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Posted 21 March 2017 - 10:18 PM

Sorry to hi-jack the Thread.

 

Really nasty overheated engines will look like a BBQ pit with congealed sludge hanging off things.

Thanks for the info.

 

Kinda like this Audi engine?

 

:D

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Edited by wtdash, 21 March 2017 - 10:22 PM.


#13 GeneralDisorder

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Posted 21 March 2017 - 10:55 PM

Exactly - I bought a civic motor that looked like that. They picked it up and had another to me the next day.

GD

#14 GeneralDisorder

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Posted 21 March 2017 - 10:58 PM

Double post....

Edited by GeneralDisorder, 21 March 2017 - 10:59 PM.





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