2000 4.2d water leak sensor bottom right of radiator

Engines and Engine Systems
EFH
Full Member
Full Member
Posts: 34
Joined: 26 Jan 2017 10:15
Full Name: Elmar Henning
Nickname: EFH
Home Town: Bloemfontein
Current 4x4: 2000 Nissan Patrol 4.2d GL
Home Language: Afrikaans / English
Has thanked: 4 times
Been thanked: 1 time

2000 4.2d water leak sensor bottom right of radiator

Post by EFH » 09 Sep 2018 16:02

Hi all got back from Potch road trip, in Bloem stopped and noticed water puddle forming with dripping water primarily from front right of car.

Heat gauge was and still is steady, water seems to be dripping from sensor on the bottom right of the radiator, is it a seal on the sensor that has failed or is ir something more serious?

Thanks!
Attachments
IMG_20180909_152823.jpg
2000 Nissan Patrol 4.2d GL
Burnco Replacement Bumper, Suspension Lift, Terrain Taimer 'erd

User avatar
Tinus lotz
Moderator
Posts: 7072
Joined: 29 Aug 2010 13:07
Full Name: Tinus lotz
Nickname: Tinus lotz
Home Town: Centurion
Current 4x4: Nissan patrol 4.8 GRX 2005

Toyota 2.7 legend 35 LWB 4X4
Home Language: Afrikaans
Has thanked: 564 times
Been thanked: 294 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by Tinus lotz » 10 Sep 2018 06:51

Begin met die cap te vervang

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5954
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 255 times
Been thanked: 255 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by ricster » 10 Sep 2018 08:58

There are two sensors on the bottom of the radiator. The one on the passenger side is to control the aircon and shut it down if the water temp gets too high as far as I know. The left one, again as far as I know, controls the glowplugs. When the water temp gets to 50deg C, the glow plugs are switched off. I would firstly try tighten that sensor a bit to see if it just needed that fraction of extra tightness to seal properly. This is all assuming that the leak is coming from there. Have a good look around to see if you can see where the start of the leak is, as it could be coming from the side of the radiator and dripping at the lowest point.

On my radiator, both sensors have a copper washer. I recently had my radiator out to repair my waterpump, as I have a massive aftermarket radiator and space is a premium. When I refitted the 2 sensors I used a little PTFE tape ( plumbers tape) on the threads as when I took them out they had some on. Be careful on how you put the PTFE tape on as you don't want bits of the tape to go into the radiator, just on the threads to help seal. Mine are as dry as the Namib desert .....haha.

Doing this will naturally mean that you need to drain the radiator, this is a good idea to flush out the whole cooling system and replace the coolant/antifreeze with a QUALITY antifreeze/coolant. Please don't use cheapy stuff. My old waterpump I took off to replace still looks fantastic inside with NO brown rusty marks or corrosion having taken place (150 000km later). Piece of mind is worth the extra money spent on good quality coolant/antifreeze. Also make sure you mix it to the specs on the bottle. Mine takes 13L of water total, so put in 6 bottles of antifreeze, keeping it just slightly under 50% mix.

While you are doing all of this, you may as well replace the 2 radiator hoses, and take the radiator out to ,make sure the fins on the radator are all clean and free of grass and seeds that are probably stuck in there over the years.
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD

EFH
Full Member
Full Member
Posts: 34
Joined: 26 Jan 2017 10:15
Full Name: Elmar Henning
Nickname: EFH
Home Town: Bloemfontein
Current 4x4: 2000 Nissan Patrol 4.2d GL
Home Language: Afrikaans / English
Has thanked: 4 times
Been thanked: 1 time

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by EFH » 10 Sep 2018 10:31

I have ordered a replacement cap, as normal in Bloemfontein you can get anything you want as long as you want it tomorrow or the day after.....

I am planning on doing coolant system flush anyway - that's what school holidays are for. I also spoke to Thinus Lotz and I am going to check for bubbles in the coolant later today to rule out head gasket failure....
2000 Nissan Patrol 4.2d GL
Burnco Replacement Bumper, Suspension Lift, Terrain Taimer 'erd

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5954
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 255 times
Been thanked: 255 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by ricster » 10 Sep 2018 11:43

I seriously doubt it is that serious. I think you may just have a small water leak. Is the radiator still the old original with the plastic top and bottom tank? It may be something as simple as the plastic giving up. Don't let Tinus scare the crap out of you with head gasket issues. If you are not overheating, then chances are that the head gasket is still fine.
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD

EFH
Full Member
Full Member
Posts: 34
Joined: 26 Jan 2017 10:15
Full Name: Elmar Henning
Nickname: EFH
Home Town: Bloemfontein
Current 4x4: 2000 Nissan Patrol 4.2d GL
Home Language: Afrikaans / English
Has thanked: 4 times
Been thanked: 1 time

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by EFH » 10 Sep 2018 12:27

Plastic as far as I can tell.

As you say, no overheating - but given the td42's reputation as a kettle, rather save than sorry.
Attachments
IMG_20180910_062628.jpg
2000 Nissan Patrol 4.2d GL
Burnco Replacement Bumper, Suspension Lift, Terrain Taimer 'erd

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5954
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 255 times
Been thanked: 255 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by ricster » 10 Sep 2018 13:06

If you are doing a coolant flush, I would whip out the radiator and send it in for a check at a reputable company. I use a great guy at Silverton radiators in Alberton.... but i think that is a bit far....hahaha.
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD

User avatar
Tinus lotz
Moderator
Posts: 7072
Joined: 29 Aug 2010 13:07
Full Name: Tinus lotz
Nickname: Tinus lotz
Home Town: Centurion
Current 4x4: Nissan patrol 4.8 GRX 2005

Toyota 2.7 legend 35 LWB 4X4
Home Language: Afrikaans
Has thanked: 564 times
Been thanked: 294 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by Tinus lotz » 10 Sep 2018 15:10

Remember if they paint that ally radiator throw it away ....a new one is like 4k so dont spend the world fixing it ...i was under the impression the water comes out the overflow pipe...is that correct?

EFH
Full Member
Full Member
Posts: 34
Joined: 26 Jan 2017 10:15
Full Name: Elmar Henning
Nickname: EFH
Home Town: Bloemfontein
Current 4x4: 2000 Nissan Patrol 4.2d GL
Home Language: Afrikaans / English
Has thanked: 4 times
Been thanked: 1 time

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by EFH » 10 Sep 2018 16:54

Driver side bottom of radiator at the sensor
2000 Nissan Patrol 4.2d GL
Burnco Replacement Bumper, Suspension Lift, Terrain Taimer 'erd

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5954
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 255 times
Been thanked: 255 times

Re: 2000 4.2d water leak sensor bottom right of radiator

Post by ricster » 11 Sep 2018 16:28

Tinus was listening upside down.....hahahahahahahaha
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD

Post Reply

Return to “09. Engines”

Who is online

Users browsing this forum: Google [Bot] and 1 guest