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
- - - - -

2003 H6, info on changing crank pulley


  • Please log in to reply
15 replies to this topic

#1 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 27 October 2012 - 07:20 PM

Some goo is seeping out of a crack on the rubber insert on my crank pulley, and it's starting to rub the case.

Biggest piece of info I'm looking for- is there a magic spot on the flywheel where the crank can be held?

2nd- I assume the oil seal rides right on the pulley like on every other chain-driven cam engine?

I assume the pulley is different from the H4s.

#2 Fairtax4me

Fairtax4me

    Su bah roo'n

  • Gold Subscribers
  • 8,531 posts
  • Charlottesburg, VA

Posted 27 October 2012 - 07:40 PM

Yes entirely different. The H6 pulley seal is between the inner pulley section and the timing chain cover. There is also a cover on the front of the pulley that has an O ring behind it. Apparently oil leaks past the threads of the bolt and the cover is there to hold it in the pulley.

#3 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 27 October 2012 - 07:47 PM

Hmmm, will have to look closer, I don't see what looks like a cover on the pulley.

Not sure what you mean by the oil seal- does the oil seal ride on the pulley?

Is the oil seal accessible when you pull the pulley?

#4 Fairtax4me

Fairtax4me

    Su bah roo'n

  • Gold Subscribers
  • 8,531 posts
  • Charlottesburg, VA

Posted 27 October 2012 - 08:53 PM

As I understand it, the front crankshaft oil seal rides directly on the pulley. Similar to most american V engine designs.
This leaves the rear section of the pulley open which can apparently allow oil through the center. The cover is held to the front of the pulley with 4 bolts.
Posted Image

Front crank seal:
Posted Image

Edited by Fairtax4me, 27 October 2012 - 08:56 PM.


#5 avk

avk

    My Outback is bigger than yours

  • Members
  • 958 posts
  • Somerset County, NJ

Posted 27 October 2012 - 10:08 PM

I haven't seen mine, but based on catalog images and application lists, it appears to be a regular seal that rides on crankshaft sealing journal. Is there any other way?

#6 Fairtax4me

Fairtax4me

    Su bah roo'n

  • Gold Subscribers
  • 8,531 posts
  • Charlottesburg, VA

Posted 27 October 2012 - 11:33 PM

The seal rides against the inner hub of the harmonic balancer.
The inner hub is a polished smooth surface just like the crankshaft journal.
Posted Image
Posted Image

Edited by Fairtax4me, 27 October 2012 - 11:35 PM.


#7 avk

avk

    My Outback is bigger than yours

  • Members
  • 958 posts
  • Somerset County, NJ

Posted 27 October 2012 - 11:42 PM

Thank you for the pictures. I thought you were saying that the seal was sitting against the flat surface of the pulley. Now I see what you mean.

#8 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 28 October 2012 - 07:00 AM

Huh, no cover on the front of my pulley, no oil leaking either.

That must be belt-and-suspenders if you use a little sealant on the crank.

#9 1 Lucky Texan

1 Lucky Texan

    I read a lot about Subarus

  • Members
  • 4,584 posts
  • Texas

Posted 28 October 2012 - 09:51 AM

this has been coming up on some Forums lately so, thought i would ask here; Is there an aftermarket lightweight pulley replacement option like the Impreza guys all have?

#10 Fairtax4me

Fairtax4me

    Su bah roo'n

  • Gold Subscribers
  • 8,531 posts
  • Charlottesburg, VA

Posted 28 October 2012 - 11:52 AM

Not unless the performance crowd got ahold of a 6 banger.

That must be belt-and-suspenders if you use a little sealant on the crank.

My thinking as well. The bolt on bits are just extra weight. A little RTV behind the crank bolt washer would solve the whole problem.

Back to the original question, since we kinda skipped over it...
Holding the crank still I would guess can be done in a similar way to the 4 cyl engines. Look for a hole in the side of the bellhousing to stick a large screwdriver. Otherwise, a prybar in the inspection cover should do it. Or the handy-mans secret weapon, Duct tape. :D

#11 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 28 October 2012 - 12:37 PM

Turns out there are 4 12mm dia holes in the pulley that a factory crank holder uses, looks like they are on a 65mm dia circle, I'm going to build a tool that uses 3/8ths bolts for a little slop (7/16ths would fit).

#12 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 28 October 2012 - 07:01 PM

Well, if it's strong enough and I didn't mess up the bolt circle, I should be good to go.

I used 3 pieces of 16ga sheet steel, brazed together at the edges and around the clearance hole for the crank pulley bolt socket, 4 3/8ths grade-8 bolts brazed in place on the top only. If they twist I'll have to braze them at the bottom as well, didn't do so because I don't want to weaken them.

#13 1 Lucky Texan

1 Lucky Texan

    I read a lot about Subarus

  • Members
  • 4,584 posts
  • Texas

Posted 28 October 2012 - 10:31 PM

I thought I had read of some holes in the flexplate that can be used to hold the crank still.

also, what about a 'starter bump' for loosening? anyone try that with the H6?

#14 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 29 October 2012 - 08:42 AM

I decided since there was a tool, and a pic of the tool, and I love an excuse to fab something, and there's less chance of introducing a new problem, and I hate digging around on the back of the engine, I'd fab something.

#15 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 02 November 2012 - 01:04 PM

I got the pulley from the dealer, but I hope I don't need the oil seal or the bolt-cap, they didn't order them.

Looks like I'll be putting some silicone sealer on the crank before putting on the pulley so oil doesn't creep out (like on every other timing-chain engine).

My pulley holder fits OK, though.

#16 CNY_Dave

CNY_Dave

    03 LL Bean H6

  • Members
  • 1,402 posts
  • Near Cortland NY

Posted 07 November 2012 - 12:11 PM

Well while changing the oil pan I see I'm paying for the dealer forgetting to order the oil seal and doing the job without it- now I get to do it all over again and put in a new oil seal.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users