Leaking coolant from an unidentified part

Re: Leaking coolant from an unidentified part (Guest)

Sat, 24 Oct 2015 07:55:07 GMT

The bleed valve (block off nut - about a 14mm octagon shape sticking out the top) on the radiator is shown on the picture on the top left hand side (passanger side when installed in the car). Go to the hardware and buy some clear 10 or 12 mm tube at about 3 m long. Cut the tube in half and attach one half of the tube to the bleeder valve (when you remove the block nut ontop of the radiator passanger side that I described), and attach the other to the valve on the heater front trunk.
Google the instructions - easy and quick task.
Once the coolant is up the tubes and stops bubbling out air - it's done.

Re: Leaking coolant from an unidentified part (tiff_lee)

Sat, 24 Oct 2015 01:53:43 GMT

Eurgh what a laborious task bleeding one of these is, very similar to Renault 5 GT Turbo's.

Try removing the cap while the engine is idling, once you get your water fountain put it back on while trying not to get soaked and beware the water will be a little warm......

Re: Leaking coolant from an unidentified part (petmr2)

Thu, 15 Oct 2015 14:55:11 GMT

I have no idea which brass tap to get and where from... If I remove the nut for now would that be sufficient? I don't plan on flushing the system that often...e very 2 years

Re: Leaking coolant from an unidentified part (Reddtarga)

Thu, 15 Oct 2015 14:49:16 GMT

petmr2
This is the radiator I bought... No bleed valve.. I can see on the top right hand side there is a bolt... can I simple unbolt that and let it bleed that way?

http://www.ebay.com.au/itm/280775958407?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

I don't think bleeding from the heater alone would work properly as air would still be trapped in the top of the radiator.
That 'bolt' in the top of the radiator would be a plug, and if you remove it coolant will spill everywhere. But if you have plenty of spare coolant and don't mind a mess you could try it.
You really need to replace the plug with a brass tap with a hose connector. That would allow proper bleeding.
It should be a stock size plumbing thread.

Re: Leaking coolant from an unidentified part (petmr2)

Thu, 15 Oct 2015 14:24:11 GMT

This is the radiator I bought... No bleed valve.. I can see on the top right hand side there is a bolt... can I simple unbolt that and let it bleed that way?

http://www.ebay.com.au/itm/280775958407?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

If I do unscrew the top bleed nut, what can I put around the thread to ensure it doesn't leak?

Re: Leaking coolant from an unidentified part (petmr2)

Thu, 15 Oct 2015 14:00:59 GMT

I've read and followed the instructions in the link you provided... But I'm curious, my aftermarket radiator does not have a bleed valve... Will bleeding from the heater core be sufficent?

Re: Leaking coolant from an unidentified part (petmr2)

Wed, 14 Oct 2015 18:08:20 GMT

I just spoke with my mechanic friend who advised he has been bleed too I can use

Re: Leaking coolant from an unidentified part (petmr2)

Wed, 14 Oct 2015 17:49:27 GMT

I have aftermarket radiator with no bleed valve? Is that going going b b problem?

Re: Leaking coolant from an unidentified part (Reddtarga)

Wed, 14 Oct 2015 16:20:12 GMT

RE bleeding:
Before attempting to do this yourself, I suggest you download the PDF and read it again carefully. Everything you need to know is all in there.
To bleed it properly is a LONG process, and needs patience to do it properly.
Also don't worry about whether fans come on or not while you are bleeding it.

BTW you will need 2 bleed service hoses, one on the heater and one on the LH side top of the radiator and the car should be on a level floor. The pic shows this.

Re: Leaking coolant from an unidentified part (petmr2)

Wed, 14 Oct 2015 11:10:43 GMT

I don't think the mechanic did this... I guess I'll have to bleed the system myself... I replaced the radiator (rusty) with a aluminium radiator from ebay so not sure if it has a bleed valve... Will bleeding it from the 2nd bleed valve in the frunk be sufficient?

So for me to bleed it properly see as though the flushing bit has been done, I just need to get a hose and connect it to the bleed valve in the frunk.
Then raise the hose and start the engine? wait for the air to come out? How long do I let the engine run for? Until the fan kicks in? Do I then shut the engine off and watch for more air bubbles to come out? then when cool down top up coolant from the engine bay? Repeat as many times until no more air bubble?

I also read this on another article "Once the hoses up front are to the level of the rear pressure cap you can put the cap back on, and start up the car" Not sure what that means? how can you measure the front and rear?

Re: Leaking coolant from an unidentified part (petmr2)

Wed, 14 Oct 2015 10:54:06 GMT

Cool thanks for the link I'll check it out

Re: Leaking coolant from an unidentified part (Reddtarga)

Wed, 14 Oct 2015 10:52:16 GMT

petmr2
My mechanic installed it so not sure if he did that... He said he bleeded the system properly... Correct me if I'm wrong, once I replace this o ring, I refill the coolant and leave the radiator cap off and then run the engine until it gets hot and watch air bubbles to come out of the radiator cap hole? How long before I know it's bleed pro[perly?

No!!
Before trying to bleed anything check out this:
http://www.mr2australia.c..r2play/tm.aspx?m=113820

Re: Leaking coolant from an unidentified part (stuka)

Tue, 13 Oct 2015 21:13:28 GMT

To bleed the system properly you need to ensure the thermostat is fully open. You will know it has opened when the feed pipe to the radiator (passenger side) starts to get hot at the point where it enters the radiator and then once the water has circulated through the radiator the return pipe on the driver side gets hot. While doing this you need to ensure air is allowed to escape through the bleed valve on the top of the radiator. If you let the water get too hot with the fill cap open the water will expand and piss all over the place and then draw back in air as it cools. To do it right you probably need something like this http://www.amazon.com/Lisle-24610-Spill-Free-Funnel/dp/B001A4EAV0

Do some research and have a look on ebay

Re: Leaking coolant from an unidentified part (antmcbane)

Tue, 13 Oct 2015 15:12:18 GMT

That's the water neck coolant outlet, I literally did the exact same fix a couple of weeks back (mine was pissing out red though :P). Basically you just need to get the 2 bolts it sits on (be really careful mine didn't want to come and I did a few doses of WD40) and I think I undid a third to make it easier to get at, pulled off a few lines etc. About half a litre of fluid came out and then I just topped it back up and bled it, didn't get any bubbles and seems fine.

90301-40005 is the product number, the stock one has 6 bits around the inner circumference but I just used a thicker oring and put some of the goop on the oring (Couldn't be bothered waiting for the oem part to come in the mail), I did end up filing it a bit as it wouldn't go in quite properly at first. The oring that I pulled out was literally in pieces. Now the cowling underneath of my engine is not covered in red fluid which can only be a good thing.

Re: Leaking coolant from an unidentified part (petmr2)

Tue, 13 Oct 2015 09:10:58 GMT

My mechanic installed it so not sure if he did that... He said he bleeded the system properly... Correct me if I'm wrong, once I replace this o ring, I refill the coolant and leave the radiator cap off and then run the engine until it gets hot and watch air bubbles to come out of the radiator cap hole? How long before I know it's bleed pro[perly?