Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

EJ25 cam swap question - swap cam or retain cam with head?


  • Please log in to reply
3 replies to this topic

#1 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 19,914 posts
  • WV

Posted 07 November 2011 - 03:16 AM

i'm getting used SOHC heads for a friends 03 forester that busted a timing belt.

1. the replacement heads are off an engine with rod knock - which suggests previous overheating and these do sometimes seize cams.
- cam seizure is related to bearing surface on the head or cam?

2. the original engine has never been overheated.

is it better to:

1. swap the original cams into the replacement heads?
2. keep the cams married to the heads they're in?

done lots of EJ swaps, head jobs...but never thought about this...

#2 MilesFox

MilesFox

    Catch this Fox!

  • Members
  • 10,534 posts
  • Madison/Milwaukee, WI

Posted 07 November 2011 - 09:06 AM

I would suppose keep the cams together. Minly, because you can remove and install the heads without removing the cams.

This is a relief to anyone who has done millions of ea82's!

I doubt the cams would be affected as much from overheats, being they are farthest from the source of heat, and are made of harder metals.

#3 davebugs

davebugs

    I don't "friend"

  • Members
  • 3,112 posts
  • Pittsburgh suburbs (NE)

Posted 07 November 2011 - 09:25 AM

I'd inspect (mostly looking for bad burnt oil evidence) and then leave the cams inplace. They are matted/worn in by this time and match the head.

And as pointed out are easy enough on a SOHC to change later if necessary.

Now if its ugly under that valve cover I might rethink it.

#4 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 19,914 posts
  • WV

Posted 07 November 2011 - 10:19 AM

that's tough, i hear you. it's just hard removing the known good, never overheated parts when i have seen cam seizures.

i'll probably keep them with the head, but save the original cams just in case.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users