The Mitsubishi Pajero Owners Club® The Mitsubishi Pajero, Shogun, Montero, Challenger, Raider and EVO 4x4 Owner's Club The POCUK - it's not just a Club, it's a way of life! Goto page 1, -:: Author Message vinno.

• Pajero Manual Radiator Hoses
• 2000 Honda Civic Ex Manual Radiator
• Pajero Manual Radiator Hose Size

Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Mon Feb 28, 2011 12:15 Post subject: TOP HOSE HOT BOTTOM HOSE COLD?PREASURE BUILD UP. Hi I am newbie here but have just bought my second Shogun. Its a V6 3.5 petrol/LPG and am very pleased with it but it has a problem. The top radiator hose gets hot but bottom hose stays cold.

The system seems to have a great deal of pressure because the hoses are very firm. If i take of the radiator cap the pressure is released and both hoses are soft again. The heater works in the car and the radiator get hot. The car doesn't overheat and doesn't lose water. Does anyone have a idea of what this could be and how i can mend it. I am thinking thermostat, air lock or possibly head gasket.

Any help would be appreciated. Google Sponsor Posted: Mon Feb 28, 2011 12:15 Post subject: Google Ads keep the POCUK free to join!

V8 rick LifeTime Member Age: 62 Zodiac: Joined: 15 Apr 2009 Posts: 5711 Location: bolton lancs Posted: Mon Feb 28, 2011 13:47 Post subject: top hose hot and bottom hose cold is perfectly normal thats the way the cooling system works on these trucks, the hose will also be quite firm just make sure your radiator cap is in good condition and its 0.9 bar pressure rated. Vinno. Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Mon Feb 28, 2011 13:54 Post subject: thanks Rick- is there a way to tell if radiator cap is working? V8 rick LifeTime Member Age: 62 Zodiac: Joined: 15 Apr 2009 Posts: 5711 Location: bolton lancs Posted: Mon Feb 28, 2011 14:37 Post subject: just make sure the seal is in good condition and it will compress freely its also an idea to check the rubber tube thats inside the plastic expasion bottle is clear by blowing down it. Stevied. Age: 58 Zodiac: Joined: 31 May 2009 Posts: 82 Location: Malta Posted: Mon Feb 28, 2011 14:44 Post subject: Sorry Vinno, not trying to hijack your thread. I have nearly the same problem, top hose hot, bottom hose stone cold, not even a trace of warm water running through.

The difference with my system is that there is not a lot of pressure in the system, I can squeeze the hoses quite easily, especially the bottom hose. The pipes from the heater matrix are very hot to touch but the heat in the car is only luke warm, even after an hours running, I can remove the rad cap without any pressure. I do not have any overheating problems either, guage stays just under halfway mark. V8 rick LifeTime Member Age: 62 Zodiac: Joined: 15 Apr 2009 Posts: 5711 Location: bolton lancs Posted: Mon Feb 28, 2011 16:15 Post subject: the only time you will find the bottom hose warm is after the vehicle has been worked hard. El Ricko. Joined: 12 May 2008 Posts: 5453 Location: UK Posted: Mon Feb 28, 2011 17:15 Post subject: the cooling system works in revese stat at the bottom of the engine, so the main rad will cool the heat produced under normal driving without ever warming the bottom hose or open the stat.

My bottom hose only get hot when towing hard or cruising at well over 70 vinno. Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Sun Mar 06, 2011 13:56 Post subject: Hi-i can understand now that bottom hose stays cold/cool. What concerns me more is the pressure build up. Both hose are very firm and if i take of radiator cap it will pop 4 feet in the air with a fair bit of coolant as well.

My 3.0 shogun doesnt do this. I am very worried that the head gasket is on the way out. Any advice please. Vinno gegs750k4. Age: 46 Zodiac: Joined: 24 Dec 2008 Posts: 6513 Location: Wigan Posted: Sun Mar 06, 2011 14:13 Post subject: well don't take the cap off then, it works under pressure, what do think should happen when you take the pressure cap off a pressurised system. If it's worrying you that much take the car to a garage and ask them to do a hydrocarbon or sniff test on it to check if the headgaskets gone. Vinno.

Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Sun Mar 06, 2011 15:18 Post subject: i understand that-but that doesnt happen on my other shogun.The pressure stays in the system even after the car has cooled down. I have bought a new 0.9 bar radiator cap byt that hasnt worked. Do you think its worth changing the thermostat and draining the cooling system? Cheers gegs750k4. Age: 46 Zodiac: Joined: 24 Dec 2008 Posts: 6513 Location: Wigan Posted: Sun Mar 06, 2011 15:25 Post subject: yeah go for it, anythings better than stripping the head.

Have you tried taking the rad off and flushing it through. Or lie it on it's back and fill it with boiling water. Feel the whole matrix then and check for cold spots in the core. If it's blocked it's easier to replace it rather than messing about trying to unblock it (unless you get it recored) vinno. Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Sun Mar 06, 2011 15:42 Post subject: last owner had new radiator- said in cracked in the snow we had before xmas. Will check thermostat though. May try without thermostat and see what happens.

Pajero Manual Radiator Hoses

El Ricko. Joined: 12 May 2008 Posts: 5453 Location: UK Posted: Sun Mar 06, 2011 16:16 Post subject: before you dive too deep the system is designed to run at 0.9 bar. Thats 14.7 psi. Think how hard you bike tyre inner tube is with 15psi in, then add the fact that its full of water. If the presure is too high you will see the expansion tank filling up with water vinno. Age: 51 Zodiac: Joined: 28 Feb 2011 Posts: 64 Location: Exmouth Posted: Sun Mar 06, 2011 17:09 Post subject: Thanks for that.

2000 Honda Civic Ex Manual Radiator

Pajero Manual Radiator Hose Size

Do you think i might be worrying unnecessary then? On the good side i don't seem to lose water,oil looks ok. But coolant looks dirty/week.I will try thermostat and flush out system. Cheers vinno El Ricko. Joined: 12 May 2008 Posts: 5453 Location: UK Posted: Sun Mar 06, 2011 17:36 Post subject: vinno wrote: Thanks for that.

Do you think i might be worrying unnecessary then? On the good side i don't seem to lose water,oil looks ok. But coolant looks dirty/week.I will try thermostat and flush out system.