The V8 Owners Forum -

Hi All, Many thanks for the replies (been away over weekend, so first chance I've had to reply). Brilliant idea Paul, I'll jack the front of the car up and give it a go this weekend........wish I'd thought of it :D :D As far as blowing water out of the exp tank, this no longer seems a problem with t...

UPDATE: Hi Guys, Sorry about the delay in posting back,better late than never.....wrecked my back so the mods had to wait. Anyway, I've fitted a larger expansion tank and put in water wetter and a higher pressure cap. As I can now see through the tank (as opposed to my old ally one) I notice that th...

Thanks Ian, Yes my exp tank has a pressure cap with both the facility to expell as well as suck the air back in. The cap is new although I don't know the pressure rating. I used to have a 15lbs pressure cap on my rad which used to blow a small amount of coolant. I got rid of this and put a non press...

If the dreaded block problem had manifersted its self, I think you would have notices either plumes of white smoke out of the exhaust, or a total inability to keep water in the rad. Hi Ian, When the earlier symptoms of losing coolant for no apparent reason reared its ugly head, I did start to wonde...

Catch can is a good Idea, even if you do not plumb it as a vacuum return, at least you will know how much water is coming out of the system. My feelings are you are possibly running a marginal system on the cooling side, with a exp tank that is too small, Lose a bit of water, not a problem but as t...

Catch can is a good Idea, even if you do not plumb it as a vacuum return, at least you will know how much water is coming out of the system. My feelings are you are possibly running a marginal system on the cooling side, with a exp tank that is too small, Lose a bit of water, not a problem but as t...

ChrisJC wrote:I expect my expansion tank is about 1 litre. It's not very big.

Chris.

Many thanks,

Dave

Went for a blat last night, probably about 15 miles. Checked my coolant this morning and would you believe there is significantly LESS in the exp tank than when I started last night. I don't get it, the last few times I check it when cold, it has risen every time. Now its on its way down. Can anybo...

Now this is weird! You know I've been telling you my coolant has been rising recently, well: Went for a blat last night, probably about 15 miles. Checked my coolant this morning and would you believe there is significantly LESS in the exp tank than when I started last night. I don't get it, the last...

I have a Rover SD1 expansion tank on my 4.6 Landie, and it's only marginally large enough. In fact, it probably isn't large enough to cover all extremes of operating. Chris. Hi Chris, Any idea on the volume of your exp tank? The total capacity of mine is 1.1 ltrs. I'm starting to think it is way to...

Did you ever have issues with the level before you fitted the new stat and pump, I am wondering if the new pump is more efficient than the old one and playing with you, Can you fit a larger expansion tank on just to eliminate the pump theory?? and before the fan probs, were you so conscious of the ...

I'd let the expansion tank spit out as much as it wants to, then I expect it will suck loads of water in, so be ready with a big jug of it! Chris. Thanks Chris, Judging by the speed at which the water rises and puthers out, I reckon a watering can will be handy. Sheesh this is going to be fun! Chee...

Jack up the front of the car and put in axle stands Then bleed it The radiator should then be above the height of the engine We have the same problem with the GT40s but then we also have 8 foot of pipe fron the engine to the rad and back This will also allow any trapped bubbles in the engine to mov...

Do I keep running the engine and hope for the elusive bubble (assuming it is an airlock) bearing in mind I'm losing coolant at a pretty alarming rate out of the exp tank. (the more revs I give it the faster the loss) Dave. Yes! It just the air trying to get out, just follow the process described, r...

So is the heater circuit just a loop?, or blanked off? I'm not sure about this, but I wonder: If you blank off the heater circuit so no water can flow, does that mean that no water flows until the 'stat is open? Chris. I have a hose from the rear of the water pump connected to the rear of the inlet...