L200 (mk5) overheating issues

[richy_B]

I did read up on this. The EGR cooler could be to blame. I assume if you blanked the EGR off (purely for offroad use) it would mean no gases passing through. 

[Stubby]

30 minutes ago, richy_B said:

I did read up on this. The EGR cooler could be to blame. I assume if you blanked the EGR off (purely for offroad use) it would mean no gases passing through. 

I blanked my EGR off (purely for all use ) years ago . I think its a pants idea . 

[richy_B]

Obviously a fully functioning EGR valve is a legal requirement of the new MOT system.  But for offroad use I completely agree with you. 

 

Next  maintenance session I am going to take the inlet manifold off and clean it all out. I had an issue with the EGR vavale sticking so cleaned it out a while back. far amount of shit in there. 

[richy_B]

[richy_B]

10 minutes ago, Stubby said:

I blanked my EGR off (purely for all use ) years ago . I think its a pants idea . 

Did you make your own blank? I assume it's between the cooler and the EGR pipe. Not at the top end towards the turbo. 

[Stubby]

Just now, richy_B said:

Did you make your own blank? I assume it's between the cooler and the EGR pipe. Not at the top end towards the turbo. 

No . Bought a ready made stainless one . D22 Navara .

[richy_B]

Well back to the drawing board!

 

Had the new radiator in a week and a bit. Did about 500 miles,  200 towing. Happened again.  

 

I had driven 150 miles with no bother, stopped in a layby to check directions before setting off again (engine not turned off). Temp just fine. Pulled away and within 15 seconds the temperature jumped to the red line and I could see steam from the bonnet. Coolant was exiting the expansion tank rapidly. Really foamy and coming out like I'd cracked open a beer keg. Let it cool and refilled the radiator - it took nearly 5 litres!

 

So we'd had new water pump, radiator and thermostat. System flushed. Compression and sniff tests for the head. I am thinking EGR system has got to be the next port of call. Maybe the valve is sticking and in certain scenarios there is enough pressure that a porous EGR cooler is letting a sudden gust of exhaust gases into the cooling system. I can't think what else would pressure a cooling system so much it would be ejecting so much coolant all of a sudden. 

 

So I can either blank off EGR and then bypass the EGR cooler with a bit of pipe or replace EGR cooler.

[Stubby]

13 hours ago, richy_B said:

Well back to the drawing board!

 

Had the new radiator in a week and a bit. Did about 500 miles,  200 towing. Happened again.  

 

I had driven 150 miles with no bother, stopped in a layby to check directions before setting off again (engine not turned off). Temp just fine. Pulled away and within 15 seconds the temperature jumped to the red line and I could see steam from the bonnet. Coolant was exiting the expansion tank rapidly. Really foamy and coming out like I'd cracked open a beer keg. Let it cool and refilled the radiator - it took nearly 5 litres!

 

So we'd had new water pump, radiator and thermostat. System flushed. Compression and sniff tests for the head. I am thinking EGR system has got to be the next port of call. Maybe the valve is sticking and in certain scenarios there is enough pressure that a porous EGR cooler is letting a sudden gust of exhaust gases into the cooling system. I can't think what else would pressure a cooling system so much it would be ejecting so much coolant all of a sudden. 

 

So I can either blank off EGR and then bypass the EGR cooler with a bit of pipe or replace EGR cooler.

Its God . He hates you .

[Steve Bullman]

3 minutes ago, Stubby said:

Its God . He hates you .

Stubby, just in case you didn’t realise, this thread is about an l200 

[Stubby]

1 minute ago, Steve Bullman said:

Stubby, just in case you didn’t realise, this thread is about an l200 

Has to be him . After all that has been tried I recon its Big G Spooky having a laugh . ?