DEFENDER2.NET - View topic - Rad cold after coolant flush

↓ Advertise on Defender2 ↓

Home · FAQ · New Posts · My Posts · PMs · Search · Members · Map · Calendar · Profile · Donate · Register · Log In

Home > Puma (Tdci) > Rad cold after coolant flush

Page 1 of 1

Print this entire topic ·

Ad-doublecab

Member Since: 05 Jan 2021
Location: London
Posts: 55

1995 Defender 110 300 Tdi DCPU Loire Blue

Rad cold after coolant flush

Hi guys,

So I recently fitted a new rad and thermostat and heater matrix on my 2.4 tdci filled up with coolant bleed the air out and the next day the coolant had dropped slight so topped it back up to the level

Took it for a drive around 8 miles but the rad isn’t getting hot getting hot air from heater but the rad still cold?

Am I not driving long enough for it to get hot or does it sound like a air lock? (Was around 30-40 min drive)

Cheers

23rd Mar 2023 7:26pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3188

2012 Defender 90 Puma 2.2 CSW Santorini Black

Sounds like engine not yet reached full operating temperature, so thermostat still closed. Especially if you were using the heater to warm the cabin, with low external temperatures, and not too much load on the engine. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

23rd Mar 2023 7:57pm

Ad-doublecab

Member Since: 05 Jan 2021
Location: London
Posts: 55

Thanks for replying I’ll take it for a longer drive with heaters off!

23rd Mar 2023 8:19pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19535

You want more like a 20 mile round trip and with the heaters off, depends on ambient temperature but it can take a while to get up to temperature.
Usually a couple of miles starts warming up, about 4 miles should be up to temperature but to fully heat up to maximum more than that.

Did you follow the bleed process of the workshop manual? Diesel$ Live$ Matter. ⛽️🛢️👨‍🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧

23rd Mar 2023 8:40pm

Ad-doublecab

Member Since: 05 Jan 2021
Location: London
Posts: 55

Thanks Steve, I’ll take it for a longer drive only thing I didn’t do was disconnect the oil thermostat coolant hose 😬

23rd Mar 2023 9:13pm

Ad-doublecab

Member Since: 05 Jan 2021
Location: London
Posts: 55

Ad-doublecab wrote:
Thanks for replying I’ll take it for a longer drive with heaters off!

Update

So I took it for a longer drive today 50 miles in total with the heater off the car was cutting in and out of power then died temp was half way, heater on alway is very hot and but drives okay rad was cold when I got back engine running but when switched it off rad was hot on the top right hand corner 😕

Anyone has this issue before?

Cheers

28th Mar 2023 4:17pm

Page 1 of 1

All times are GMT + 1 Hour

Jump to

< Previous Topic | Next Topic >

Posting Rules

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum