Strange coolant leak. Any suggestions? - LotusTalk - The Lotus Cars Community
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 11-01-2009, 12:33 PM Thread Starter
Registered User
 
lotusdriver2001's Avatar
 
Join Date: Mar 2004
Location: Manteca, CA
Posts: 212
Strange coolant leak. Any suggestions?

The car is a 2003 - V8. There is a cooling leak and the coolant seems to be coming out the bottom of the bell housing. The way I found this is by putting a hand-powered pressure bleeder on the header tank in place of the overflow tank hose. I pressurize the system to about 10 -12 lbs (based on the car having a 15 lb. cap) and coolant drips out at the bottom of the bell housing.

Are there freeze plugs in the back of the engine? Is there a pathway for coolant to get in there from the top?

Any ideas?
lotusdriver2001 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 11-01-2009, 05:07 PM
Registered User
 
Simba's Avatar
 
Join Date: Jan 2008
Location: NY
Posts: 580
Check the turbo coolant lines along the top of the transmission.

There's also an aluminum crossover pipe in the same area, could have developed a crack, or a cracked hose.

Last edited by Simba; 11-01-2009 at 05:13 PM.
Simba is offline  
post #3 of 7 (permalink) Old 11-01-2009, 07:34 PM Thread Starter
Registered User
 
lotusdriver2001's Avatar
 
Join Date: Mar 2004
Location: Manteca, CA
Posts: 212
Did that one...

Thanks but I did check the turbo lines, and just about any other lines I could see, find, and reach. Did discover that when the shop did my timing belt they appear to have removed the hoses for the coolant pipes in the front of the engine, both of them, for access. They were loose and leaking. I had to reach up there and tighten them. Just a benefit of chasing this problem.

The coolant appears to be coming from inside the bell housing. I'm wondering if maybe there is a freeze plug under the fly wheel that could be leaking. Perhaps a head gasket leaking into the center of the engine and running down somehow inside the bell housing? I'm really sort of hoping of something easy that I'm missing. Neither of the two options I mention are exceptionally pleasant.
lotusdriver2001 is offline  
 
post #4 of 7 (permalink) Old 11-01-2009, 07:45 PM
Seb
BANNED
 
Seb's Avatar
 
Join Date: Mar 2007
Location: Austin, TX
Posts: 1,012
There should be no freeze plug on the transmission side of the engine from what I'm aware of. I would start from the top of the engine and work down. Gravity is a great tool to diagnose fluid leaks.
Seb is offline  
post #5 of 7 (permalink) Old 11-02-2009, 05:44 AM
Registered User
 
Simba's Avatar
 
Join Date: Jan 2008
Location: NY
Posts: 580
There's no freeze plug, but the thermostat housing is on the top of the engine under the intake manifold, it's possible they didn't seal that properly and it's pooling and leaking out through the rear of the engine.

The only other possibility in that area would indeed be a head gasket, however were it leaking badly enough for you to notice it dripping, you'd be pegging the temp gauge and crop dusting the neighborhood with white smoke.

I'd say pull the trunk floor out, start it up, and watch. When the system pressurizes you'll see anything that amounts to drips of coolant.
Simba is offline  
post #6 of 7 (permalink) Old 11-03-2009, 05:08 AM
Registered User
 
Join Date: Apr 2009
Posts: 120
Assuming fluid is coming from the bell housing weep hole you can plug it then release after runing to see if this is true. I believe it's a small leak from elsewhere as only tranny grease or engine oil would come from the weep hole. It must be a very small leak or your "add coolant" light would have come on by now. If you've checked all the lines then look closely at the water pump.
billt is offline  
post #7 of 7 (permalink) Old 11-22-2009, 06:28 PM
Registered User
 
Join Date: Nov 2009
Location: New Jersey
Posts: 3,011
The thermostat is on the front of the motor on the V-8, not near the bell housing. The thing to do is to remove the trunk floor and pressurize the cooling system. There are hoses coming off of the back of the motor that go to the turbos and there is a header bottle which could be leaking. Worst case is a head gasket. It is possible there is a leak on top of the motor and it is running down the back over the bell housing. Not likely it is inside the bell housing. The low coolant light may not be working. The float on the sensor gets stuck if the header bottle is dirty. The header bottle is supposed to be filled to the top and the overflow bottle in the R/R wheel arch is supposed to fluctuate. The hose from the header bottle to the overflow bottle can get plugged up.
David Teitelbaum
jtrealty is offline  
Sponsored Links
Advertisement
 
Reply

  LotusTalk - The Lotus Cars Community > Lotus Discussions > Lotus Esprit

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the LotusTalk - The Lotus Cars Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome