Good luck trying to find any documentation stating pre-existing issues with the 1KZ heads. Where do we get documented evidence that this is a faulty component, not caused by a failure of some other cooling component? I have seen this 3 times before (customers rides). But according to reliable mchanics in specialist 4WD centres this appears to be common occurence for this model - and supported by views of others on this site. Extended manufacturers warranty claim being denied because 'heads just don't crack by themselves'. Head testing claimed internal crack between coolant chamber and exhaust valve port. Mine over heated suddenly and diagnosis was cracked head. Either that or she's someone else's problem now! Cracked Head Prado Diesel Realise your message is over 12 months now but I have same problem and wonder how you got on getting any documented statements about weakness in Prado diesel head walls. He's not the kind of bloke to just say stuff like that either - he's a tradesman, not a salesman! I don't think you are on your own with a cracked head on a small japanese diesel (not only prado's), but i reckon you were real unlucky being only just out of warranty. This bloke said you wouldn't get to the next town as she'd crack the head and die if I got him to machine it. This doesn't leave any room for machining to be done and to go on to be reliable - they are high compression and need the full wall thickness. Instead I had to buy a new head which was over $2000.Īpparently the manufacturers went as skimpy as they could with the wall thickness in the casting of the heads to save money.

Leaking water into number 3 cylinder.Īny info appreciated Hi I realise your original message was a while back, but I thought I'd drop you a line anyways! I have a '00 GXL Prado I went to get my 1KZTE head serviced at a reliable machine shop in my region and they denied me. It stated to idle rough, first thought was bad fuel/pump/ electronics, few minutes later temp shot up so I shut it down. Vehicle is an '01 TX TD auto, I bought it with 95K and it has performed faultlessly until the head gasket quit very suddenly. The problem has occurred within the 3 month statutory warranty period, but I get the feeling that the Toyota dealer is having a bit of a wriggle and I'd like some information as ammo if they start to argue. Really interested in 'this happened to me', rather than 'I have a mate who knew someone' stories. I would like to collect some stats on how many other people this has occurred too.

Well, the verdict is in - the head on my 1KZ Prado is cracked and is to be replaced. The following material is intended to provide a brief overview of the metallurgical considerations that, daily, influence the design and production of the most reliable fasteners in motorsports.Īny info appreciated.

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1kz-te cylinder head crack