possible heater mod - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old January 21st, 2011, 11:03 AM
wantone
Status: Offline
Rick Thompson
94 ST #1222
Member
 
Join Date: Aug 2009
Location: Omaha
Posts: 315
Registry
possible heater mod

hi guys, so i have been reading exhaustively all the heater threads (been real cold in omaha!) I thought of this. Some threads talked about mods to essentially relocate the heater intake into the cabin to re-circulate the air so the heater does not have to heat up the cold outside air. Has anyone used like a hole saw to make a few holes in the plastic box that goes from the wingtop to the heater, then blocked off the vent on the wing top? Wouldn't this now redirect the air coming in to the heater from the outside but under the hood where the engine is heating the air? Does this make sense? What do you all think? I might try this, then when summer hits, put plugs in the holes and unblock the vent on the wingtop.


thanks
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old January 21st, 2011, 11:11 AM
rijosho's Avatar
rijosho
Status: Offline
Joshua
1995 Black ST - Rhinolined edition
Research Assistant/Eagle Eyes
 
Join Date: Apr 2009
Location: NYC
Posts: 16,557
Registry
Have you tried checking the cable per Amityd90 from this thread?

http://www.defendersource.com/forum/...ad.php?t=28843
__________________
Quote:
I am talking purely from an aesthetics standpoint.
Reply With Quote
  #3  
Old January 21st, 2011, 11:12 AM
2yellowlabs's Avatar
2yellowlabs
Status: Offline
Rob
92 RRC, 99 DII, 06 LR3, 09 LR2
Member
 
Join Date: Nov 2010
Location: SEATTLE
Posts: 388
You would then be potentially sucking exhaust gases and everything else that leaks and burns off under the hood like oil, PS fluid, coolant, etc into the cabin. Bad idea!

Quote:
Originally Posted by wantone View Post
Has anyone used like a hole saw to make a few holes in the plastic box that goes from the wingtop to the heater, then blocked off the vent on the wing top? Wouldn't this now redirect the air coming in to the heater from the outside but under the hood where the engine is heating the air? Does this make sense? What do you all think? I might try this, then when summer hits, put plugs in the holes and unblock the vent on the wingtop.


thanks
__________________
Thank you -

Rob
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old January 21st, 2011, 11:25 AM
wantone
Status: Offline
Rick Thompson
94 ST #1222
Member
 
Join Date: Aug 2009
Location: Omaha
Posts: 315
Registry
yep, check the cable and all is good. good point on the exhaust gas etc, that would stink things up pretty well! I am just trying to make it work a bit better without having to pull out the heater, increase hole in bulkhead etc. That will wait until summer when it is alot warmer to work on it! You know, just a few simple quick fixes.

thanks gentlemen!
Reply With Quote
  #5  
Old January 21st, 2011, 11:25 AM
Red90's Avatar
Red90
Status: Online
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,232
Registry
You can't recirculate all of the air or else you will fog up. You need some fresh air.

You should first make sure your heater is setup properly. They are not bad when setup.

1) Make sure the engine thermostat does not leak. There should be no warm water in the upper hose until normal operating temperature is reached.

2) Check that the hot/cold flap (on top of box) is tight to the hot side.

3) Make sure the lower vent flaps are opening.
Reply With Quote
  #6  
Old January 21st, 2011, 11:31 AM
wantone
Status: Offline
Rick Thompson
94 ST #1222
Member
 
Join Date: Aug 2009
Location: Omaha
Posts: 315
Registry
yep, check them and all is good. i did notice however at the intake on the wingtop some air was being pushed out when it is on and running on high. this tells me that something may be plugged up inside such as the heater core or something. I would imagine if it is all flowing freely and correctly, the wingtop vent would only be sucking in air, kinda of like a weak vacum cleaner. Make sense?
Reply With Quote
  #7  
Old January 21st, 2011, 01:08 PM
UnfrozenCaveman's Avatar
UnfrozenCaveman
Status: Offline
Keith Armstrong
Various
Member
 
Join Date: Jun 2010
Location: Land Between the Rivers
Posts: 684
A nice piece of cardboard in front of the radiator makes it warm up better over here in Des Moines

Leave a couple of 5x7" holes in it for air and it's seemed just fine.


...entirely too lazy to pull the heater assembly and "adjust" the bulkhead. Winter is what the Disco is for....
Reply With Quote
  #8  
Old January 21st, 2011, 02:12 PM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
The biggest problem I have is that at speed the soft top pumps air in and out which makes the heater not do much to get the interior warm. In a SW I am sure it would be fine for all but the coldest places.
__________________
*not legal advice*
Reply With Quote
  #9  
Old January 21st, 2011, 02:24 PM
rijosho's Avatar
rijosho
Status: Offline
Joshua
1995 Black ST - Rhinolined edition
Research Assistant/Eagle Eyes
 
Join Date: Apr 2009
Location: NYC
Posts: 16,557
Registry
Quote:
Originally Posted by evilfij View Post
The biggest problem I have is that at speed the soft top pumps air in and out which makes the heater not do much to get the interior warm. In a SW I am sure it would be fine for all but the coldest places.
x2. At lower speeds I'm sweating, but at higher speeds the heat just goes everywhere else.
Reply With Quote
  #10  
Old January 21st, 2011, 03:45 PM
CDNRover's Avatar
CDNRover
Status: Offline
Jeff Labbé
110 Ex-Mod FFR 200tdi
Member
 
Join Date: Jul 2007
Location: Tewkesbury,Canada
Posts: 672
Registry
I had a heater that sucks air from the interior. It worked well and no fog. The trick is to use a different motor side.. Let say you have a LHD truck. Use a LHD heater box with a RHD blower. That way your blower air intake is going to be closer to the bulkhead. Cut a 3" hole in the passenger foots well. Use a 3" flexible tubing from a dryer (home appliance store should be able to sell it). Then connect the tubing from the foots well to the blower. I used a plastic 3" plate , that usually goes at the exit if the dryer tubing to prevent back draft to come into your house, at the foots well to help connect the tubing. Heats up more fast and in my experience Defender are not that air tight, so no fogging problems!
__________________
Younger, we pointed the lad I now became.
Reply With Quote
  #11  
Old January 21st, 2011, 05:31 PM
Red90's Avatar
Red90
Status: Online
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,232
Registry
Sounds like you getting no air flow. Check the air shutoff valve (side of heater box) and make sure it is open.

If that is OK, then pull the heater and take the core out for a looksee. It is a pretty quick and simple job.
Reply With Quote
  #12  
Old January 23rd, 2011, 10:25 AM
nikojo's Avatar
nikojo
Status: Offline
John
D90 SW -- 2.8PS
Member
 
Join Date: Jun 2008
Location: Fly over Country
Posts: 587
Just replaced my heater yesterday (half day project).

It's not rocket science just a PITA and took time. I've sure there must be threads detailing the process. If not, I'm happy to describe.

The biggest pain is the two screws at the top bulkhead. These are a bitch to remove as space is cramped. Some have suggested removing the hood for easier access but this is not necessary. You will need stubby (short) 13mm wrench for that part. The two screws at the bottom are easy.

The matrix seems to "go bad" in a lot of these either from internal or external blockage or both. Also, the external and internal weatherstripping and padding seem to disintegrate and also may be nonfunctional.

Agree with all said by everyone.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
heater, mod

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mod to widen the heater hole in bulkhead Overlander Defender Technical Discussions 9 July 18th, 2009 12:08 AM
cables to heater box ? mattdh Defender Technical Discussions 3 March 6th, 2006 09:33 AM
110 Heater Hose Routing newfD90 Defender Technical Discussions 11 February 1st, 2006 02:02 PM
Heater Improvements? And Hi ... again.. EdF Defender Technical Discussions 6 September 13th, 2005 01:51 PM
heater motor lubricant ??? artm Defender Technical Discussions 1 October 18th, 2003 04:42 PM


All times are GMT -5. The time now is 12:26 PM.


Copyright