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Guest Message by DevFuse
 

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Which engine models blow head gaskets?


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30 replies to this topic

#26 nipper

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Posted 04 March 2007 - 11:13 AM

Follow-up question: After replacing the EJ25 with a new head gasket set, how long do you expect it to last? Will the head gasket blow again in approx 100k mile due to the design of the engine? Or will other parts of the engine fail before the new head gasket fails again?


There is no firm answer on this. If you replaced a headgasket at 140,000 miles, no one can say what your engine will be like at 240,000 miles. Now if you replaced one below 100,000 miles it should be able to make it to over 200,000 miles.
My obw never had a HG issue, but due to the previous owners once a year oil changes it threw a rod at 190,000 miles.

Now if you are the original owner, and maintain your cars, then yes it should last over 100K, hell maybe way into 200k.
It's like asking if you wil still be alive and healthy in 10 years, you make the safe assumption that you will be, but no guarentees. As you get closer to 80, its hard to say yes with that.

nipper

#27 bratman2

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Posted 04 March 2007 - 11:44 AM

Of the Neons, I know only three owners and all had headgasket failures before 100k miles. Sure some have made it past 100k but I don't know of them.

#28 nipper

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Posted 04 March 2007 - 11:56 AM

Of the Neons, I know only three owners and all had headgasket failures before 100k miles. Sure some have made it past 100k but I don't know of them.


neons are the only one that i will agree have a 100% failure rate. Chrysler denies it.


nipper

#29 bulwnkl

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Posted 28 May 2007 - 12:24 PM

Fortunately for Neon owners (like me), the 2g motors had adjustments made which appear to have solved the issue. For example, they machined all the head bolt/stud holes deep enough so that all bolts can provide the proper clamping force on the entire gasket so that it won't fail.

Thank you, fellows, for making and cleaning up this thread.

#30 DerFahrer

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Posted 28 May 2007 - 12:57 PM

a) EJ22* - 2.2L 4 cyl SOHC 135HP/140ftlbs (most solid & non interference)
Legacy 90-96
Impreza 95-01
NO Gasket problem on the older ones, rare on newer models


The EJ22 had hydraulic lifters up through 96, and only had 130hp/137tq in that itineration. EJ22s 97-up were solid lifter and interference. They were used on the Legacy through 99 and the Impreza through 01.

B) EJ251 - 2.5L 4cyl SOHC 155HP/155ftlbs
Impreza '00-'02
Forester '00-'02
YES Gasket problem: external coolant leak
Non turbo EJ25 engine.



These were 165hp for sure, and I think 165tq. They were used in the 99-04 Impreza, 00-04 Legacy/Outback, and 99-04 Forester.

C) EJ252 2.5L SOHC
Legacy '00
YES Gasket problem: external coolant leak



EJ252 is just an EJ251 in a certain car. I think it's more years than just 00, and I think it's just in the L. Not sure on this though.

D) EJ253 2.5L SOHC
Impreza '02-'07
Legacy '01-'02
Forrester '99
NO Gasket problem past 2003
Designed to take turbo boost.



All my sources indicate the EJ253 was never used on a car before 05, and that ALL nonturbo EJ25s from 05-up are EJ253s. It is NOT designed to take turbo boost.

E) EJ25D 2.5L DOHC
Legacy '96-'99
Forester '98-'99
YES Gasket problem: Internal leak/blown



Not used in the Forester in 99, but used in the Impreza 2.5RS only in 98.

F) EJ25E 2.5L DOHC
Impreza '99-'01
Forester '99-'00
Legacy '00-'01
YES Gasket problem: Internal/blown



No such thing as an EJ25E...

G) EJ255 2.5L DOHC turbo
Impreza '06-Now
Forester '02-Now
Legacy '05-Now
NO Gasket problem
Designed to get turbo boost.



Used in the Forester XT only from 04-up. Edit: Forgot the Baja in 05 and 06.

H) EJ257 - 2.5L DOHC turbo 300HP/?
Impreza WRX STi '04-Now
NO Gasket problem
Designed to get turbo boost.



This is pretty much correct. Had 300tq to begin with, but when the SAE ratings changed, the 300hp and 300tq marks came down to 293.

I)EG33 - 6-cyl
NO Gasket problem
G series are closed deck.



The EG33 is just an EJ22 with two extra cylinders. They are NOT closed-deck.

Other stuff: All EJ engines became Phase II in 99. All Phase II engines have solid lifters, as best I know, all nonturbo engines are piston-valve interference, and ALL DOHC Subaru engines are valve-valve interference.

As best I can tell, the EJ251 was used uniformly from 99-04 in the Impreza line (Impreza and Forester) and from 00-04 in the Legacy line (Legacy and Outback). Due to the external leak issues, the EJ253 came out in 05 and is now used in all Subaru nonturbo cars, minus the EZ30 H6. There have been remote issues with EJ253s, but nothing that seems to determine a mass defect in the engine build.

And a disclaimer to all this: ANY Subaru can blow a headgasket. EJ22s have blown headgaskets, EG33s have blown headgaskets, EJ20s have blown headgaskets, etc. etc. Overheat them, or take poor care of the cooling system, and it can happen.

#31 schlit

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Posted 28 May 2007 - 01:51 PM

Just because one is an Automotive Engineer doesnt mean they know squat about the statistics and percentages of failures. And anyone saying its a 15% 25% 35% failure rate is just taking a guess unless they're getting numbers from SOA or any other legit source. Its just misleading to say otherwise.

Some of you guys in here crack me up.....saying a 140k HG failure is attributed to age and then turn around and say its a problem with hondas too. Im led to believe that since there's entire websites set up for this specific subaru problem, it's very likely a bigger problems for Subarus.

http://home.comcast....m/guestlog.html




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