VDO Vision EGT pyrometer sensor installation. - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #1  
Old November 21st, 2009, 09:55 AM
sundogcwolfe
Status: Offline
Charles R. Wolfe
1984 110, 300Tdi
Member
 
Join Date: Nov 2009
Location: Duluth, MN
Posts: 31
VDO Vision EGT pyrometer sensor installation.

I need some help installing my VDO Vision EGT sensor. I plan to drill the EGR blanking plate and weld the fitting supplied to the plate and WaaLaa ....done deal. Ah but not so simple.

Couple of questions.
1) How important is it to get the sensor tip into the main section of exhaust manifold? The EGR plate is at about a 25 degree angle from perpendicular and if I use the fitting so that I get maximum penetration (i e weld from inside side of plate) the probe will come in contact with the bottom of the exhaust manifold. Potential solution but more difficult than I wanted to do, would be to have the fitting at an apppropriate angle on the plate to keep the sensor horizontal and thus acheivemore depth into the manifold.

I guess the real question iwould be; is the gas temperature in the segment of the manifold where the EGR resided adequately representative of the EGT in real time. Do I need to get the probe into the main segment of the Manifold or is just residing in the two inch section of the former EGR adequate?

I know I am probably overthinking this but as the EGT is a rapidly changing value, the quest for good data seems reasonable.

Love your forum.

Cwolfe
Two Harbors MN
1984 110 Defender 300 TDI
1959 Series II 109 PU

PS As a new defender owner, (Series owner for 2 1/2 decades) I anticipate lots of questions and quandaries as I dwell into making her my daily driver. I do solemnly swear to adequately search my quest before posting for help. However, mundane and seemingly idiotic questions may pop up from time to time. Please tolerate like a doddering old uncle.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old November 21st, 2009, 10:04 AM
dave_lucas's Avatar
dave_lucas
Status: Offline
Dave Lucas
None
Member
 
Join Date: Sep 2003
Location: CO USA
Posts: 3,126
There is a post somewhere on this site that has pictures and everything you are looking for, try searching EGT.

I thought I had a link but can not find it at the moment
Reply With Quote
  #3  
Old November 21st, 2009, 10:08 AM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,624
Registry
ROFL. Nice first post, and welcome aboard. Sorry I can't help with the diesel stuff.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old November 21st, 2009, 12:31 PM
Viton's Avatar
Viton
Status: Offline
Deaf Ember
Smart 4x4
Member
 
Join Date: Jan 2009
Location: La
Posts: 1,231
I welded mine in as to be horizontal with the ground in attempting to get the tip of the probe in the center of the exhaust flow. This is where the temperature is the highest, so I've heard or read. The company I bought mine from had various length probes available. I think I bough the 2-1/2" probe to try and accomplish this.

Then there's the debate, "should the probe be positioned before or after the turbo?"

Dennis
Reply With Quote
  #5  
Old November 21st, 2009, 12:38 PM
Uncle Douglas's Avatar
Uncle Douglas
Status: Online
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,832
Registry
Make sure you remove the egt block off plate and get a feel for the hole you are trying to stick the probe into- you dont want to run the probe into cast iron. FWIW I just drill and tap that plate and do not weld the supplied bung to the plate.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Vehicle Shipment and Importation Service
Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old November 21st, 2009, 05:23 PM
Ren Ching's Avatar
Ren Ching
Status: Offline
Skinny Pete
'84 90 "Yamelo"/'88 RRC "Chewbacca"
Member
 
Join Date: Mar 2007
Location: Downtown
Posts: 4,696
Registry
What Doug said. You can just get it to thread into the plate. Though it appears mine is leaking a bit. Wonder if some furnace cement will fix that.


Quote:
Originally Posted by Maryland 110
Make sure you remove the egt block off plate and get a feel for the hole you are trying to stick the probe into- you dont want to run the probe into cast iron. FWIW I just drill and tap that plate and do not weld the supplied bung to the plate.
Follow-up Post:

Before. Unless you like melting things.

Quote:
Originally Posted by Dennis
Then there's the debate, "should the probe be positioned before or after the turbo?"

Dennis
Reply With Quote
  #7  
Old November 22nd, 2009, 09:34 AM
sundogcwolfe
Status: Offline
Charles R. Wolfe
1984 110, 300Tdi
Member
 
Join Date: Nov 2009
Location: Duluth, MN
Posts: 31
Thanks for all your input. It does appear that unless I weld it to the horizontal, the tip of the VDO vision probe won't reach into the open chamber part of the the manifold.

Now I have to reconcile the different approaches to boost gauge senors. Do I just t-off the tube to the waste gaste (easy) and get turbo production boost or do I go through the labor of tapping into the intake plenum and get the boost the manifold is seeing. Hmmm. Seem like I would need to remove the intake manifold to do this will and remove the risk of getting any drill fragments into the mix.

Decisions Decisions. I hope that old girl appreciates the mildly stressful yet enjoyable contemplation that her new driver undergoes as he readies her for adventures. Over the years, I have had many vehicles but have melded with only a few. Those are the ones that we count our decades by. My foray into the garage with this vehicle fills me with the anticipation of the successful flirtations of a early relationship. To quote Rick from Casa Blanca, "Louis, I think this is the beginning of a beautiful friendship."

Cwolfe
Reply With Quote
  #8  
Old November 22nd, 2009, 10:43 AM
Ren Ching's Avatar
Ren Ching
Status: Offline
Skinny Pete
'84 90 "Yamelo"/'88 RRC "Chewbacca"
Member
 
Join Date: Mar 2007
Location: Downtown
Posts: 4,696
Registry
I've always had manifolds off for drilling and tapping but I have since heard that not everyone does. You can put grease on the drill and the tap to catch the majority of the chips. And you can vaccum out the manifold too. Not to mention you can drill and tap the plug @ the back of the 300tdi intake. Use the search to see photos, there is a big merged VDO/EGT/Etc Etc thread.

In fact this should probably get merged into that thread.

Congrats on your new ride. Photos? Is this one that belonged to a list member before?


Quote:
Originally Posted by sundogcwolfe
Thanks for all your input. It does appear that unless I weld it to the horizontal, the tip of the VDO vision probe won't reach into the open chamber part of the the manifold.

Now I have to reconcile the different approaches to boost gauge senors. Do I just t-off the tube to the waste gaste (easy) and get turbo production boost or do I go through the labor of tapping into the intake plenum and get the boost the manifold is seeing. Hmmm. Seem like I would need to remove the intake manifold to do this will and remove the risk of getting any drill fragments into the mix.

Decisions Decisions. I hope that old girl appreciates the mildly stressful yet enjoyable contemplation that her new driver undergoes as he readies her for adventures. Over the years, I have had many vehicles but have melded with only a few. Those are the ones that we count our decades by. My foray into the garage with this vehicle fills me with the anticipation of the successful flirtations of a early relationship. To quote Rick from Casa Blanca, "Louis, I think this is the beginning of a beautiful friendship."

Cwolfe
Reply With Quote
  #9  
Old November 22nd, 2009, 10:54 AM
dave_lucas's Avatar
dave_lucas
Status: Offline
Dave Lucas
None
Member
 
Join Date: Sep 2003
Location: CO USA
Posts: 3,126
My understanding is that the intake manifold is the best place to locate the feed for the boost gauge.

I just drilled and tapped mine Saturday and here is how I did it.

inserted a vacume cleaner into the intake at the same depth that I planned to drill the hole
put grease on the drill bit
turned on vac
drilled hole
put grease on tap
tapped hole

After I was done I did not see and chips of aluminum in the intake

With that said I have a Defender 200tdi and ended up removing the exhaust manifold to drill / tap the EGT probe and damaged the gasket so I ended up removing the intake after all.

With the intake manifold off I was able to tell that there was a little fine aluminum dust in the area where I drilled. Not sure if the fine aluminum dust would cause issue but I cleaned it out really well.

If I were to install one in the future I would get one of the little barbs that installs into the intercooler hose or weld a bung in the metal tube between the intercooler and the intake or just remove the intake to drill / tap.
Reply With Quote
  #10  
Old November 25th, 2009, 09:42 PM
crown14's Avatar
crown14
Status: Offline
Verticalscrote
Volkswagen Super Beetle
D-90 Source Vendor
 
Join Date: Jul 2006
Location: 44 Nas Row, Inter Net, USA
Posts: 3,285
Registry
Didnt I post a bunch of pics related to all this? Maybe in the 300TDI performance thread?
Reply With Quote
  #11  
Old September 25th, 2011, 02:31 PM
Manimal's Avatar
Manimal
Status: Offline
Carl Jonsson
1995 NAS D90 #219
Site Team
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,236
I ordered an OEM blanking plate and gasket to drill a hole and weld the threaded sensor holder onto. Why is the gasket so damn thick? It's twice as thick as the blanking plate itself. I'm concerned that if I use the gasket the probe won't go in far enough. Thought?
Reply With Quote
Reply

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

Tags
installation, sensor

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
EGT/ Pyrometer sender best location ???? Uncle Douglas Defender Technical Discussions 6 August 9th, 2008 11:31 AM
FS/FT VDO Vision Clock Hans For Sale - Parts 5 October 31st, 2007 01:13 PM
VDO Vision Series Fuel Gauge surf110 Defender Technical Discussions 4 September 13th, 2006 04:04 PM
vdo water gauge install and 210 fan info Davis Defender Technical Discussions 5 February 24th, 2005 11:47 PM
RC Nautique pics loykd Trips, Trails and Events 37 October 27th, 2004 07:59 PM


All times are GMT -5. The time now is 06:15 PM.


Copyright