Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
dtownmil

Consuming coolant

Recommended Posts

My coolant has been "slowly" dissappearing. Early on I could go hundreds of miles before the light would flash at me, I'd fill it and move on. Now its been more frequent. I do not see any coolant on the garage floor or driveway. I have already replaced the cap with a newer version (had the original). I thought the cap fixed the problem, but its back.

I know it could be the tank, or some "Y" tube I've read about. I'm sure its been thoroughly discussed, but my exhaustive searches haven't found me what I needed.

Any info would be appreciated, or if you can provide a link to a previous thread.

Thanks in advance.

2000 Boxster 2.7L 60,000 miles. 5 speed.

Share this post


Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

This is not a good sign; the Y tube or the tank would leak onto the garage floor, yours sounds like it is not, and I am assuming it is not in the oil either. Most common faults for this are head gaskets, or a cracked head (not that uncommon). Testing would involve pressure testing the cooling system, and doing a “leak down” test on each cylinder to pin point where it is. In any case, the M96 will most likely need to come apart…………..

Share this post


Link to post
Share on other sites

Are there any signs of leakage on the underbody? When I replaced the front engine mount I was struck by how many joints there are in the cooling system. The hard and soft hoses run to the front of the car behind black plastic panels, if you had a slow leak there, you might see some evedence on the panels.

If you have leakage into the oil slowly you might not ever see it on the dipstick.

You might try draining the oil to take a look at it, you'd need something huhe, then check for coolant and pour it back in.

Might also do a compression check, remove all 6 plugs, screw the tester into each cylinder and crank it checking for low compression, if you are sucking coolant into a chamber, you'll have low compression.

Try removing the coolant cap with the car running to see if it is pressurzing.

I think leaky oil coolers leak oil into the coolant syaten, not coolant into the oil.

I would also do a very good visual check. You could have a minor leak that is dripping onto headers or something that is burning it off, hence it wouldn't leave a puddle.

Keep us posted what you find.

Share this post


Link to post
Share on other sites

A cracked tank won't necessarily lead to fluid on the floor. Check underneath the carpet in the rear trunk. My 01 had the smallest of cracks that I didn't detect for a long time - it took a while for it to pool up in the trunk.

Also, run your hand under the tank and look for obvious wetness and or residue (dried fluid).

Edited by por986

Share this post


Link to post
Share on other sites

My coolant has been "slowly" dissappearing. Early on I could go hundreds of miles before the light would flash at me, I'd fill it and move on. Now its been more frequent. I do not see any coolant on the garage floor or driveway. I have already replaced the cap with a newer version (had the original). I thought the cap fixed the problem, but its back.

I know it could be the tank, or some "Y" tube I've read about. I'm sure its been thoroughly discussed, but my exhaustive searches haven't found me what I needed.

Any info would be appreciated, or if you can provide a link to a previous thread.

Thanks in advance.

2000 Boxster 2.7L 60,000 miles. 5 speed.

Pull the trunk carpet around the coolant reservoir -- see if the pad underneath is wet.

I finally caught it drip leaking -- but it took a long time.

If not there -- things get worse like others have said.

Mike

Share this post


Link to post
Share on other sites

Are there any signs of leakage on the underbody? When I replaced the front engine mount I was struck by how many joints there are in the cooling system. The hard and soft hoses run to the front of the car behind black plastic panels, if you had a slow leak there, you might see some evedence on the panels.

If you have leakage into the oil slowly you might not ever see it on the dipstick.

You might try draining the oil to take a look at it, you'd need something huhe, then check for coolant and pour it back in.

Might also do a compression check, remove all 6 plugs, screw the tester into each cylinder and crank it checking for low compression, if you are sucking coolant into a chamber, you'll have low compression.

Try removing the coolant cap with the car running to see if it is pressurzing.

I think leaky oil coolers leak oil into the coolant syaten, not coolant into the oil.

I would also do a very good visual check. You could have a minor leak that is dripping onto headers or something that is burning it off, hence it wouldn't leave a puddle.

Keep us posted what you find.

A craked head will also pump oil into the cooling system,and you won't see it in the oil. Seen that one before too.

Howard

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.