Blowout 3 expansion tank in one year.

[haohao]

Hi,

First sorry I must register a new name because I forgot the password and email address


Now I got this problem, 3 expansion tank in one year. My truck is 95 DI and the first one is original black tank. There is no suprise because it's too old. My second and third one are all "new design" white box with blue cap. Both of them gone so soon even faster than the old black one.


The problem happened each time I go some montain area but I swear that I didn't drive more than 40mph. Well, now I began to think about it. Is there any other reason that may cause such kind of crap? The over fill is definitely not the one of answer, it's checked and refilled by one of the "most Experienced specialists" in the area three weeks ago.

So any one has the idea whats wrong of this truck?

BTW: The temperature of engine is normal and I pretty sure the indicator is working good.

very very thanks for your help.


hao

 

[Sergei]

You dont use that blue cap on them, are you?

 

[p m]

Hao, take your truck to a shop that has a "sniffer" of exhaust gasses in the coolant.
A tiny leak may be sufficient to build up the pressure to eventually blow the tank, without affecting the coolant temperature.

 

[AndyThoma]

95's have a bad reputation for clogging the radiator from old age. Mine would overheat and boil over at the expansion tank. The temp gage would read normal temps. Check to see if you radiator is clogged. I blew some weak hoses and my tank while driving up into the mountains, I replaced all the hoses, t-stat, expansion tank and cap while all helped, it would still boil over. The real reason I was boiling over was the clogged radiator. I could see the tank breaking with to much pressure being built up in the system, as the cooling fluid overheats from the lack of flow throught the radiator. Find a rover mechanic that can power flush your radiator, they might be able to tell you if your radiator is clogged. If you have 100k on that radiator, I bet its cogged and done.

 

[Gabe]

My guess would be more likely head gasket is leaking combustion pressure into the water under load. This is a common problem with all closed systems and your Rover shop should be able to test for combusion gas in the coolant.

GG

 

[RangeRoverHP]

Is the tank leaking or is coolant blowing out the cap.

 

[scrover]

Now I got this problem, 3 expansion tank in one year. My truck is 95 DI and the first one is original black tank. There is no suprise because it's too old. My second and third one are all "new design" white box with blue cap. Both of them gone so soon even faster than the old black one.

What do you mean by 'gone so soon', did the tank split?

SC

and PLEASE tell us you are not trying to use the blue cap that comes with the tank to protect the thread.....

 

[Joey]

When all else fails, contact these guys in the UK, they don't show it on the web site yet, but they offer a aluminium header tank for the Land Rover of course the price is a little hight at L165 http://www.brunelperformance.co.uk/

you can see a pick and more info on page 10 of the November issue of LRM

 

[haohao]

Thans for all you guys.

Now it must be something leaking or the old radiator.

I will take the truck to a shop and test it and report the result to you guys.


Thans again.


hao

 

[haohao]

Is the tank leaking or is coolant blowing out the cap.

It's leaking from the join line(between the top piece and bottom piece) like water fall.

 

[haohao]

You dont use that blue cap on them, are you?

Now i'm so regret that I should keep the blue one and use it. At least I can save my tank, right?

 

[scrover]

When all else fails, contact these guys in the UK, they don't show it on the web site yet, but they offer a aluminium header tank for the Land Rover of course the price is a little hight at L165 http://www.brunelperformance.co.uk/

you can see a pick and more info on page 10 of the November issue of LRM

I saw that Brunel tank - badass I little high for sure - about $350 by the time you get it here

SC

 

[ptschram]

Pull the cap, start the engine. If it quickly begins to percolate through the expansion tank, you have a blown head gasket leaking combustion gases into the coolant.

If this is the case, obtain a device that allows you to pressurize the cylinders with shop air through a spark plug hole-if there is a leak, you'll find it now! Most likely, it is the rear-most cylinder, right side.