Thread: Extractors on Suzuki Vitara

Originally Posted by No.3

Not sure Im exactly following what you're trying to achieve - replacing the extractors is one thing but it won't by itself achieve a huge deal. As part of a free flow exhaust system, opening any intake restrictions and a careful look at engine bay heat control (lagging extractors etc) it would help. The heat is coming from in the engine, so getting the gasses out is the trick. The other thing is a brand new upgraded radiator with extra capacity and uprated fan(s). If you have a miss in one of these, you generally experience what you found with induction then shortly after either head(s) off or replacement donkey. Sometimes that doesn't fix the miss too...

I am hoping it is the cause of the miss- I feel like I have tried everything else.....

For the most part it works OK. I am not looking for power or performance. I am happy with standard performance and reliability and for what I do, bog standard has been fine. I have had it for over 100,000km and In fact all I am really trying to achieve is reduce as many contributing factors to it finally breaking as I can. Apparently one of the contributing factors to the heads on these vehicles going is the fact that the head and block are aluminium and the standard exhaust manifild is cast iron. The manifild as it is retains a lot of heat even after the block and head cool down, which extractor headers help address. Its not getting a hard time (270,000km on it and as far as we can tell it is the first time the head has been off....)

The radiator is on the list seeing as I will have to get it checked anyway, as is anything else I can do while I am in there so hopefully we can leave "the lid on" for another 250,000km.....