chrex Posted March 3, 2017 Share Posted March 3, 2017 Evening all, quick tech query. Noticed over the last few weeks that there has been coolant leaking down the side of the block. Appears to be coming from behind the exhaust manis. The galley pipework is fine, no leaks from that - any suggestions at all? Considered maybe head gasket but can they leak out? Never seen it before! Temps all fine, no issues with running or unusual smoke from exhaust. Seems to be losing about half the expansion tanks worth in a 3 hour drive. Cheers Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 3, 2017 Share Posted March 3, 2017 There is a coolant drain in the block thereabouts worth checking that first. Then core plugs as they've been known to go. Could also be the water pump and coolant flicking back that way? Quote Link to comment Share on other sites More sharing options...
chrex Posted March 3, 2017 Author Share Posted March 3, 2017 I dont think its the drain as its coming from further forward than that. seems to be dribbling down rather than spraying. core plugs could be a good shout, i will need to get it cleaned and then see what i can see. just a bugger of a place to try and see properly Quote Link to comment Share on other sites More sharing options...
Shane Posted March 3, 2017 Share Posted March 3, 2017 (edited) double post Edited March 3, 2017 by Shane (see edit history) Quote Link to comment Share on other sites More sharing options...
Shane Posted March 3, 2017 Share Posted March 3, 2017 (edited) Is it an NA? On the back of the NA waterpump housing there is a small core plug that tends to fail, I will see if i can find the threads, sadly pump, crank pulley and cam belt need to come off to change it. Only on the NA though. Here you are: http://www.mkivsupra.net/vbb/showthread.php?270206-Core-Plugs/page2&highlight=chris+wilson+core+plug http://www.mkivsupra.net/vbb/showthread.php?281106-2JZ-GE-Overheating/page2&highlight=core+plug+shane Edited March 3, 2017 by Shane (see edit history) Quote Link to comment Share on other sites More sharing options...
chrex Posted March 4, 2017 Author Share Posted March 4, 2017 Shane - cheers for that, i will have a good look tomorrow then. Still seems to be too far back to be waterpump, the run down the block appears to be just behind the gap between the two manifolds...and appears to be running straight down the block. Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted March 4, 2017 Share Posted March 4, 2017 Shane - cheers for that, i will have a good look tomorrow then. Still seems to be too far back to be waterpump, the run down the block appears to be just behind the gap between the two manifolds...and appears to be running straight down the block. Theres a waterfeed that goes through the throttle body so might be worth checking that hose as it seems to be where you have the leak. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 5, 2017 Share Posted March 5, 2017 Core plug? Oh what joy if it is as they will all be pretty knackered if one's leaking. Engine out job Quote Link to comment Share on other sites More sharing options...
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