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Guest Message by DevFuse
 

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Cracked heads...


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16 replies to this topic

#1 TurboSPFI

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Posted 15 August 2005 - 10:18 AM

Well, Ive fully pimped out my cooling system including a headgasket job to find out that I have cracked heads... pretty nasty cracks inbetween the intake and exhaust valves...

So, what should I do? I hear brand new loaded heads are about 250$? per side... Should I cough up the 500$ plus whatever it costs to get the delta cams or just run this motor until it dies?

I guess the question is.. would it be worth it to get some virgin heads with some new cams?

#2 88rxsedan

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Posted 15 August 2005 - 10:34 AM

the small crack in between the valves is normal, even with gen 3 heads..
ive seen several cracked with no performance degredation..
could you post a picture of it for further analysis

#3 TurboSPFI

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Posted 15 August 2005 - 11:00 AM

Nah, I've already reasealed my engine... I still have the bubbles in my coolant which I'm almost sure comes from that dept.

#4 NorthWet

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Posted 15 August 2005 - 12:38 PM

I would seriously doubt that those cracks reach into the water jacket. Generally (speaking non-soob-specific), those cracks bridge the intake and exhaust ports and/or cause issues with the valve seat inserts. Without bandsawing the head apart, I would guess that the nearest that the water jacket gets to the valve seat bridge area is about 1/2 inch... that would be a very deep crack, and the car would show other problems first.

#5 MorganM

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Posted 15 August 2005 - 01:54 PM

Yes I would suspect cracks somewhere else. Not between the valves like you noticed but rather deep in the exhuast port where they actually can crack into a water jacket. Cracks can be hard to see with the eye. I have heads pressure tested by a machine shop to see if they are realy cracked or not.

#6 Steveman09

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Posted 15 August 2005 - 02:01 PM

When I rebuilt my EA82 I too had the big cracks between the valves on both heads, I then ported the heads out even bigger and had them pressure tested to extreme PSI and they passed with flying colors.


No problems.

#7 TurboSPFI

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Posted 15 August 2005 - 03:19 PM

Dang, the things I should have done BEFORE I resealed the motor.. oh well, I was on a timeframe.

#8 NorthWet

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Posted 15 August 2005 - 04:14 PM

BTW, you might want to consider getting rebuilt heads. CCR is an option, as is at least one place in the Seattle/Tacoma area and at least one in Portland, Oregon. The semi-quote that I heard a year ago for turbo heads from a local rebuilder was around US$230-250 a pair. (Don't know about SPFI, but should be nearly the same price.) By the time you pay to pressure-test, surface the head, and do a valve-job, you are probably looking at more than that cost.

#9 TurboSPFI

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Posted 15 August 2005 - 07:04 PM

I hear brand new loaded heads are about 250$? per side... Should I cough up the 500$ plus whatever it costs to get the delta cams or just run this motor until it dies?



I'm not talking about rebuilt.

#10 NorthWet

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Posted 15 August 2005 - 08:47 PM

I'm not talking about rebuilt.

I understood that. I was offering up rebuilts as a very viable option.

#11 TurboSPFI

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Posted 15 August 2005 - 11:16 PM

OK thanks... :-\

#12 MorganM

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Posted 16 August 2005 - 08:30 AM

I hear brand new loaded heads are about 250$? per side..


Where did you get that quote? All the $200 to $300 heads I found were remands. I paid about $400 for a brand new one from SOA.

#13 ausubaru92

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Posted 16 August 2005 - 04:53 PM

This is from a technical service bulletin stating that cracks between the valves are ok

Gannon

Attached Files



#14 TurboSPFI

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Posted 16 August 2005 - 05:00 PM

OO! Thanks ausubaru!! thats the info i needed right there... no spending money for me yay yay yay :banana:

#15 Dirk

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Posted 21 April 2011 - 04:31 AM

Thanks from me too.

#16 jeffast

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Posted 21 April 2011 - 08:31 AM

OK thanks... :-\

if you do consider going with rebuilt heads i would use retro roo
http://www.retroroo.com/
he specializes in 79 through 95 subarus

edit: wow, didnt read the original post date on this one lol at me

#17 Dirk

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Posted 22 April 2011 - 01:25 PM

For those who are interested.

Posted Image




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