Acton Posted June 15, 2015 Share Posted June 15, 2015 (edited) 1993 j-spec na auto I bought this car yesterday, and after my 200 mile trip home noticed that the front of the car was covered in brown gungy stuff that seems to have come from the radiator/ catch tank. I can't see any loose hoses or where it's come from. It was running pretty high on the temp gauge, roughly 3/4 to Hot. I checked the oil cap and it's clean, so don't think it can be head gasket related. Any one able to help?? This isn't how I imagined my first venture into Supra ownership was going to go... Pictures: Edited June 15, 2015 by Acton (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 15, 2015 Share Posted June 15, 2015 That is some pretty scummy rusty deposits! What does the stuff in your expansion tank (in front of the rad black plastic cap) look like? The rad should always be full of coolant, how much does it take to brim it back up? What does the bottom of your rad cap look like? It MIGHT just need a really good flush with a hose pipe, a new rad cap and some nice fresh coolant. Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 15, 2015 Share Posted June 15, 2015 I'm only over the other side of the hogs back if you need a hand I may be able to help........ Quote Link to comment Share on other sites More sharing options...
Nic Posted June 15, 2015 Share Posted June 15, 2015 Head gasket failures are rare. Start by flushing out the system, refill with fresh coolant, check all jubilee clips are tight and there are no leaks, clean up the surface where the radiator cap seals against and fit a new Toyota radiator cap. Quote Link to comment Share on other sites More sharing options...
Acton Posted June 15, 2015 Author Share Posted June 15, 2015 What colour anti-freeze should I use, blue or pink? Quote Link to comment Share on other sites More sharing options...
adam1983 Posted June 15, 2015 Share Posted June 15, 2015 Colour isn't really an issue so long as you flush the old stuff out properly. If it were me I would just get a couple of 5 litre bottles of the halfords pre mixed. It's pink in colour and is safe to use on supras [emoji4] Quote Link to comment Share on other sites More sharing options...
Acton Posted June 15, 2015 Author Share Posted June 15, 2015 Ok cool, thank you for your advice on the matter. I will definitely be flushing the system at the weekend, hopefully that'll put an end to it Quote Link to comment Share on other sites More sharing options...
adam1983 Posted June 15, 2015 Share Posted June 15, 2015 I think there is a guide on here about flushing the system. There is also a decent guide with a list of all the various recommended fluids for the supra which is well worth a read. I would link them but I'm on my phone. Quote Link to comment Share on other sites More sharing options...
Acton Posted June 15, 2015 Author Share Posted June 15, 2015 Ok thank you, I'll see what I can find. Out of interest, my car has been running at this temp: Is this normal, or should it run cooler than this? Quote Link to comment Share on other sites More sharing options...
ScottC Posted June 15, 2015 Share Posted June 15, 2015 (edited) It should sit in the middle when hot, although your needles will have been removed at some stage so they may not be in the correct position. Edited June 15, 2015 by ScottC (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 15, 2015 Share Posted June 15, 2015 I think a 200 mile trip wouldn't have been possible with a serious issue. Ideally you'd remove both top and bottom rad hoses and flush that through. Undo the matrix pipes at the back of the engine and flush this (careful to stop water going down the spark plug wells) undo the very awkward to get to block drain (it's behind the rear most exhaust manifold) and then flush some more! This will give you the most thorough flush Quote Link to comment Share on other sites More sharing options...
Acton Posted June 15, 2015 Author Share Posted June 15, 2015 I think a 200 mile trip wouldn't have been possible with a serious issue. Ideally you'd remove both top and bottom rad hoses and flush that through. Undo the matrix pipes at the back of the engine and flush this (careful to stop water going down the spark plug wells) undo the very awkward to get to block drain (it's behind the rear most exhaust manifold) and then flush some more! This will give you the most thorough flush Thanks Scooter, and thank you for the offer of help. I may take you up on that if I have any problems (I'm in Frimley so not far at all!) I'm planning on flushing it at the weekend. And I'll have a look for standard rad caps too, just in case Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted June 15, 2015 Share Posted June 15, 2015 That looks like radweld to me. As above though, take the rad off and flush everything through, hosepipe in the top rad hose, maybe even flush the heater matrix out too Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 15, 2015 Share Posted June 15, 2015 No probs, I got a cap from ebay recently jap-hogs was the seller, well worth the tenner if the one you have looks old, the area of leaking suggests it's at least part to blame. I just recently did my water pump and had all the relevant pipes off, so yeah if you get stuck drop me a message. Quote Link to comment Share on other sites More sharing options...
adam1983 Posted June 16, 2015 Share Posted June 16, 2015 To be on the safe side I would just go to Toyota and buy a genuine rad cap from there. They are not expensive but worth getting to rule out that being an issue Quote Link to comment Share on other sites More sharing options...
Dnk Posted June 16, 2015 Share Posted June 16, 2015 (edited) ................ Edited June 16, 2015 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Dnk Posted June 16, 2015 Share Posted June 16, 2015 The coolant should be Glycol Ethylene based, colour is a manufacturers guide and not a specific type of coolant I'd flush the system thoroughly and before refilling with coolant refill with water and pressure test it. If you go onto the homepage at the top left you will find the Repair manuals which cover just about everything on the mkiv, here is the Cooling system http://www.mkivsupra.net/vbb/content.php?60-Cooling-System Quote Link to comment Share on other sites More sharing options...
Acton Posted June 16, 2015 Author Share Posted June 16, 2015 The coolant should be Glycol Ethylene based, colour is a manufacturers guide and not a specific type of coolant I'd flush the system thoroughly and before refilling with coolant refill with water and pressure test it. If you go onto the homepage at the top left you will find the Repair manuals which cover just about everything on the mkiv, here is the Cooling system http://www.mkivsupra.net/vbb/content.php?60-Cooling-System Thank you for that Quote Link to comment Share on other sites More sharing options...
Dnk Posted June 16, 2015 Share Posted June 16, 2015 That looks like radweld to me. As above though, take the rad off and flush everything through, hosepipe in the top rad hose, maybe even flush the heater matrix out too Good advice I'd also be replacing the thermostat and rad cap for genuine Toyota parts too. If its the cars original rad its probably scrap and well worth replacing it. Before you do though the system needs a serious clean, rad weld is for the bodgit and scarper club Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted June 16, 2015 Share Posted June 16, 2015 Good advice I'd also be replacing the thermostat. Another good point, if thats the cap, and all the coolant flows through the thermostat, I bet thats clogged up too Quote Link to comment Share on other sites More sharing options...
Acton Posted June 16, 2015 Author Share Posted June 16, 2015 I found this: http://www.fensport.co.uk/Parts/Model_36/Category_5/776 and this: http://www.fensport.co.uk/Parts/Model_36/Category_5/3146 Are these the right parts/ is there somewhere better to get them? Quote Link to comment Share on other sites More sharing options...
Tommyd16 Posted June 16, 2015 Share Posted June 16, 2015 Easiest way is to just go to Toyota with your vin and they can sort you out with what you need Quote Link to comment Share on other sites More sharing options...
Acton Posted June 16, 2015 Author Share Posted June 16, 2015 Easiest way is to just go to Toyota with your vin and they can sort you out with what you need Luckily there's a Toyota dealership about 400m down the road. I'll pop in to their parts dept then Quote Link to comment Share on other sites More sharing options...
Nic Posted June 16, 2015 Share Posted June 16, 2015 (edited) Toyota part numbers 16401-62100 CAP SUB-ASSY, RADIATOR 90916-03093 THERMOSTAT Edited June 16, 2015 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
adam1983 Posted June 16, 2015 Share Posted June 16, 2015 Rad caps are not expensive from Toyota so not really any need in buying aftermarket in your situation. Thermostat from Toyota im not sure on price but I wouldnt have thought it would be much. Quote Link to comment Share on other sites More sharing options...
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