Jump to content
Ultimate Subaru Message Board
danielzink

How do you replace the rear cam plug (the one without bolts)

Recommended Posts

Okay...

 

I'm diving into this re-seal project.

 

I've done a search but not coming up with anything..

 

On the drivers side rear of the head - there's a big black metal cam plug.

 

How in the world do you remove...and replace it ?

 

Thanks, Dan

Share this post


Link to post
Share on other sites

What engine are you working on?

 

As far as I know there's nothing to service or re-seal at the rear of the left (driver's side) head on an EJ engine.

Share this post


Link to post
Share on other sites

is it leaking?

 

leave it alone. i've never seen or heard of those black plugs leaking or being replaced or sold.

 

if it's the half moons, then those come apart as the valve covers/heads are disassembled.  those are just tapped out, covered with sealant.

Edited by grossgary

Share this post


Link to post
Share on other sites

I see them leak all the time. I tend to drill a small hole in it and thread a small slide hammer into it and pop it out. Seen other guys tap a screwdriver through it near the edge and pry but you would want to be careful as to not score the aluminum or cam shaft.

Share this post


Link to post
Share on other sites

I've replaced several of them that were leaking.

 

I drive a flat head screw driver into the side of the hump in the middle to pry them out.

Use a large socket to drive the new seal in.

Share this post


Link to post
Share on other sites

1990 EJ22

 

Yes. Mine is leaking.

 

Thanks Caboobaroo and Su bah - I ordered a couple off the 'bay. Will get it installed this weekend.

 

I have a slide hammer so I'll try that first.

 

Dan

Edited by danielzink

Share this post


Link to post
Share on other sites

I've replaced several of them that were leaking.

 

I drive a flat head screw driver into the side of the hump in the middle to pry them out.

Use a large socket to drive the new seal in.

I have a 1999 Phase II with the "bolt-less" cam plug leaking on the passengers side - you're saying you can pull them out externally and tap a new one in place?

Do you use sealant or install clean?

 

I see everyone says pop it out and press it back in - is it basically as simple as a regular cam seal?

 

Someone else said they just cleaned it with brake cleaner and pressed a bead of sealant down the groove all the way around the circumference.

http://www.subaruoutback.org/forums/66-problems-maintenance/85897-cam-plug-leaking.html

Edited by grossgary

Share this post


Link to post
Share on other sites

Yeah it's the same idea as a cam seal, except the middle isn't open. I don't use any sealant. I wipe the outer edge with clean engine oil or grease and push it in. There is a drain hole for the cam bearing, and you don't want to get that plugged up with sealant.

 

 

RTV on the outside could be a good fix if you can get it clean enough, as it is tricky to get to with the engine in the car.

 

I figure if the original lasts 200k miles the replacement will last the rest of the life of the car.

Share this post


Link to post
Share on other sites

I hit it with cleaner/compressed air/cleaning and then RTV'ed it.  Only because I didn't want some debacle where it doesn't come out or new one doesn't seal right.  Got nothing to loose - if this doesn't get it, I'll get a new plug. 

Share this post


Link to post
Share on other sites

Did the RTV fix the leak? I see no way to get any leverage to replace the cap with the engine in.

 

Yep.  The one I did is fine. 

Share this post


Link to post
Share on other sites

I've replaced several of them that were leaking.

 

I drive a flat head screw driver into the side of the hump in the middle to pry them out.

Use a large socket to drive the new seal in.

Exactly !

No need to worry , just take your time and you'll get it.

Share this post


Link to post
Share on other sites

The plug is driven in too far and is blocking the oil drain hole at the bottom of the journal.

The only reason those plugs pop out is the oil drain hole is blocked and oil pressure builds behind the plug and forces it out. This can either be from the plug being driven in too far or from excess sealant used on the cam carrier plate seam that squeezed into the drain and blocked it. In rare cases heavy sludge formation blocks the drain.

  • Like 1

Share this post


Link to post
Share on other sites

Hi and thanks! There is no indication in the service manual how far to seat this plug. I see 2 holes - one at 9 and the other at 4. Both are clear. Is there another one at the bottom? The Diver-side is seated the same and has no problem.

 

I see this is a common problem. Should the lower step of the ring be flush with the face of the hole? THANKS!

ej25campluginsertion.jpg

 

flush or just below.

 

That's how all seals and plugs on subarus are.  Many seals are prone to being over driven.  espscially important for rear main, and Cam seals.

  • Like 1

Share this post


Link to post
Share on other sites

No the special tool hits the head before the plug is pushed in too deep.

 

The outer face of the plug should be flush with the bottom of the indent.

  • Like 1

Share this post


Link to post
Share on other sites

Okay great! So, I'll probably relax the bracket a little I placed on it. The plugs are rather cheap from Pep Boys but the fear of losing all of your oil out of this plug (when it pops out) in less that the time it takes me to write this reply is rather frightening... Thanks again!

have to say I've never ever seen one come out.  A few leakers, but never one that just comes out completely.  that's a new one.  Maybe those PepBoys plugs are not so good a fit eh???

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×