Help please!!

[JUDWAK]

The rad was new a year ago. Could the heater matrix be pulling air in but not leak???

rads have lasted me 3 mounths its worth cheching down the back with a light
just to look for wet bits or pin holes

[magnum force]

rads have lasted me 3 mounths its worth cheching down the back with a light
just to look for wet bits or pin holes

Thats the first thing to look at in the morn then, thanks!!

[Diezel Weazel]

[Quote] Now this is the problem, after a run the coolant has gone into the the tank leaving the level in the rad down below the fins and is not going back into the rad as it needs it.
So i have to siphon the coolant out of the bottle and put it back in the rad.
Can someone help me on this cos i'm at my whits end. [Quote]

Phil, had the same probs a couple O years back (without any head probs) in the top of the rad a tiny pin prick (only visible after after a run)
Sounds like yours is doing the same !!!!
I did keep topping up the Rad n header tank with no probs for two years untill I got round to soldered it ...
Good Luck

There's always a Payback .... Just don't expect any warning !!!!

[magnum force]

[QUOTE=Diezel Weazel;512387][Quote] Now this is the problem, after a run the coolant has gone into the the tank leaving the level in the rad down below the fins and is not going back into the rad as it needs it.
So i have to siphon the coolant out of the bottle and put it back in the rad.
Can someone help me on this cos i'm at my whits end.

Phil, had the same probs a couple O years back (without any head probs) in the top of the rad a tiny pin prick (only visible after after a run)
Sounds like yours is doing the same !!!!
I did keep topping up the Rad n header tank with no probs for two years untill I got round to soldered it ...
Good Luck

There's always a Payback .... Just don't expect any warning !!!!

thanks for the info mate, i'll take a closer look at the rad to moz but i'm not loosing coolant, i'm taking the same amount back out of the header and putting back into the rad. \so, can i still have a pin prick and pulling air in but not letting coolent out???

[Diezel Weazel]

{Quote]
thanks for the info mate, i'll take a closer look at the rad to moz but i'm not loosing coolant, i'm taking the same amount back out of the header and putting back into the rad. \so, can i still have a pin prick and pulling air in but not letting coolent out??? [Quote]

Ya may not be noticing ya loosing any coolant but it sounds like it's seeping into n filling the Header tank ... (hence ya having to empty it) so ya could have the minutest of pin holes .....
(thats why it took soo long to find n fix mine)

There's always a Payback .... Just don't expect any warning !!!!

[magnum force]

[QUOTE=Diezel Weazel;512416]{Quote]
thanks for the info mate, i'll take a closer look at the rad to moz but i'm not loosing coolant, i'm taking the same amount back out of the header and putting back into the rad. \so, can i still have a pin prick and pulling air in but not letting coolent out???

Ya may not be noticing ya loosing any coolant but it sounds like it's seeping into n filling the Header tank ... (hence ya having to empty it) so ya could have the minutest of pin holes .....
(thats why it took soo long to find n fix mine)

There's always a Payback .... Just don't expect any warning !!!!

OK my friend, i'll have a good look round after work to moz. We have a rad firm here, wounder if they can test it?? Anyways, thanks for your input mate, i'll let ya know the outcome.

[MattF]

I assume you are allowing it to cool down before checking?

Yes mate, evrytime

How long for, roughly? The system can take several hours to draw the coolant back in. First, check that the hoses to the expansion tank lid are a snug fit, including the internal pipe. Second, check as others have mentioned that the rad and all hoses are in good nick. Look for a white powder type residue. That will usually be the only sign you'll see of any coolant leaking unless it's puthering out.

[Apache]

I have a cheap rad with some pinholes in it. Been like that for a year or so. I have another one ready to go in but am too lazy to fit it in this weather. I just keep an eye on the coolant, but figured the rad is never gonna suck the coolant from the bottle if it can suck air in easier. Mine never gets below the fins, but loses level down to the fins in around a month or so.

I'll get round to it, one of these days - like so many things...

"Puthering"? Ahhh, traditional Barnsley dialect...

[MattF]

"Puthering"? Ahhh, traditional Barnsley dialect...

It is indeed.

[magnum force]

Well peep's, been in my garage till 9 to night and i have turned that rad inside out. No leaks, no pin holes. Then it dawned on me, before i did the head i changed the stat and the rad cap, the more i thought about it the more i started thinking about that cap.
So, i took out the coolant out of the header tank and put it back in to the rad. Warmed up the engine again and watched the coolant fill up the tank. Up to temp i turned the engine off and waited. And waited, and waited. Not one drop went back into the rad.
Once it had cooled i siphoned the coolant back out and into the rad but this time i put the old cap back on and ran to temp. Coolant went into the tank to just over half way. When it was up to temp i turned the engine off and marked the tank with tippex. As it was cooling down the coolant level started to fall away from the mark and went near on to where it was when i had siphoned it.
So peep's look's like the cap, come to think about it the last time i did a service i changed the cap which i had from Roughtrax and that was faulty as well. This cap i have on was on when it was imported, makes ya wounder dont it??
Anyway, i have left it at that, facing up hill till morning. We will see to moz.

I would like to thank you all for your help, once again you have tried to help me out and once again i am in your debt. I know i'm not on here much and thats mainly because i am a moderator in a off road forum (called C.O.R.C) local to me and it takes up a fair bit of my spare time, but its reassuring to know that when i need help ya all there.
Big thanks to you all.
Happy Surfin!!

[Trooper]

Coolant return

Check the rubber washer under the exp.tank cap. It can turn and block the return of coolant (like a one way valve). I've seen it on my Surf and a Rav4 that has the same tank/tube set-up. Turn it back so that the end of the tube matches the little cut-out and check that the tube reaches the coolant in the tank (almost to the bottom).

[magnum force]

Well peeps, a week on and still having probs with the truck.
After a week of burping etc i took it for its first out of town run yesterday. The first big hill i got to and half way up the temp went up.
Fitted a new rad and all new jubilee clips and burped it again.
I cant get my head round this now. It will tick over all day with no coolant going into the expansion bottle, soon as i take the revs up to over 3000rph coolant starts filling the bottle. So i turn the engine off and let it cool down but the coolant will not go back into the rad.
So, the head has been done, new rad, new clips, new rad cap and stat. Would you all agree that the next stage can only be the water pump??? my thoughts are that the propeller is spinning at tick over but when at revs its slipping on its shaft, would i be right do you think???