KZJ90, I didn't notice any drop in performance in fuel economy either. Had this constant cold start problem that cost me hundreds in wasted glow plugs and the fuel filter pump assembly. It wasn't until I told Toyota that something was wrong and they needed to find out that they discovered the bubbles in the water and found the hairline cracks. Without knowking what was wrong at the time I towed a caravan from the Gold Coast to Adelaide and back via the Oodndatta and Birdsville Tracks, did Big Red, the development road and back via Charleville. Pad System Keygen Generator here. It still pulled 100 KPH in 5th with the van on! Stilll drove around for another 6 months before they found the cracks!

Diagnose & Repair a Cracked Cylinder Head: Cracked Cylinder Diagnosis. Toyota Cylinder Head 3.0 1KZ TE Suits Hilux Surf Prado Colorado Toyota Pickup Image.

So don't be too worried, if it were a Patrol 3.0 Td GUII 'hand grenade' there would be reason for concern. There are plenty of Chinese heads that are bad, and some that are good. China now makes engines and components for many car companies around the world, Honda included. There is a guy selling on ebay, as well as conducting his regular engine reconditioning business. I have purchsed heads and other stuff from him, and the quality is good. I think he goes by willyengines or similar on ebay.au. Remember, it doesn't matter how good the head is.

If you go with a cheapy gasket, or do something stupid like reusing head bolts, or not fixing the cooling system, the head will fail. Just becaused a head fails, doesn't mean it is a bad quality head. Remember, it doesn't matter how good the head is. If you go with a cheapy gasket, or do something stupid like reusing head bolts, or not fixing the cooling system, the head will fail. Just becaused a head fails, doesn't mean it is a bad quality head.The gasket was good quality (made in Japan), new bolts (btw. Toyota gives permission to use old ones, if they are thick enough), cooling system is at very good condition, no towing, no highway speeds, no immediately shut downs after long term driving.

I don´t understand why you say the head which is cracked after 4 months usage, is not bad quality head.:evil: I think it is crap, not quality at all (athough it looks fine). I know they can make a good quality product in China, if they want, or somebody demands. But aftermarket parts are what ever happens to be.

Chinese heads can be ok but they still need to have the pre combustion chambers looked at as they never get the height rite on installtion it also wouldnt hurt to change them to stein brand as the chinese pre co chamber are not too good it also pays to get the valves re seated and a better skim on the head,and with gaskets use genuine Toyota head gaskets and always after replacing a head find out what caused the problem originally, to much boost? Check the cooling and fuel system and allways change coolant with genuine coolant ( as you can not get much better )and NO additives on the recomended intervals as well as the oil. I have allways done the coolant change reguarly and NEVER had a problem with my vehicles over heating:wink. I've got a Prado 2002 with the 1KZTE and basically all the symptoms you guys have said is whats happening to mine. I bought mine with 310K on it and less that 6 months and only a couple of long trips it appears the head is cracked. Dont know if the previous owners have changed it or not as theres nothing in the service book about it. Anyway I'm changing mine over week after next.

I'm getting the AMC brand just like Theroo advised. I spoke to the guys at SMS Diesel and they advise against the chinese made ones too. Its not a huge difference in cost with a complete head, gaskets, bolts etc for $1450 for the chinese one and about $1550 for the AMC one. Going to change the timing belt, water pump, tensioner and idler pully while I'm at it.

You are right, never buy chinese copy. I did that, it lasted only 4 months/6500 km!

All heads are made of aluminium. Then I bought oem Toyota head from Steve OBrien, Engine Company Services Ltd: Complete original Toyota head with Toyota head gasket (complete kit with recycled camshaft/valves, included bolts and other gaskets) was £899 about 1,5 years ago. I had to send the old camshaft and valves to them. What I have heard and understood, AMC heads are even better than original. You can get those from Roughtrax.

Click to expand.When I had my cracked head last year with the old radiator I would use up water every time the engine runs and I would see the temp gauge moving when going up hills and towing. I have had this cracked hear for nearly 3 years now. Last year I replaced the radiator and it does not use up any water when running around, only when towing and pushing it hard on the motorway. Ed Sheeran I See Fire Download Mp3 Free. When I replace this head, I will put a Intercooler in and maybe a second temp gauge to help monitor the temperature.

So would you reccomend a chinease one or should I stick with roughtrax? Hi, I replaced mine with an AMC unit from Roughtrax. I bought the 'ready-to-fit' option with the cam and valves fitted and shimmed.

The head has been fine, but I used a pattern gasket which leaked soon after fitting. This Spring I replaced the gasket with a genuine Toyota one (and used jointing compound in case there was a low spot somewhere) and have had no trouble since. I also replaced the radiator, water pump and put a 76deg thermostat in. Its been fine towing a double horse trailer with two large horses since then. 1kz t head gaskets leaking??

Jaronimo, I'm not sure that I understand all this.. You have an 80deg thermostat in the top and a modified thermostat in the bottom, how has the lower 'stat been modified?? On the standard set-up there is no restriction to the flow at the top and the lower 'stat is 82deg C. The problem seems to be that the top gets too hot under sudden loads and the bottom doesn't get hot enough to open the 'stat.

With the lower 'stat closed, the coolant can circulate around the block. With the lower stat open the flow from the bottom of the block is stopped and coolant circulates from the bottom of the radiator, past the oil cooler (hidden behind the oil filter) around the head and out of the top to the radiator. Presumably the system relies on thermosyphon to let cool coolant replace hot coolant at the bottom of the block.

If your lower 'stat is stopping the flow from the radiator, your top 80deg C 'stat won't make any difference as it will open way before the lower one. I'd be inclined to put a 76deg C 'stat in the bottom - but I think the top stat will still be redundant - unless, of course, you have done something clever to the lower 'stat. I await an explanation with interest!