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Originally Posted by soulman
DV8, how many clicks have u put on your motor with the stock HGs? ( after they were replaced).
I guess i dont mind changing the HGs every 100,000 kms hahahahaha
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First engine had 120 on it and was fine the second was at 40k and I put less than 10k on the engine, but i ran nitrous like a mad man, so the HG started to go bad. The first engine,i bent a valve the second, i torched the block and HG, the third is now my 3.5 TYPE II and i baby it. tune it on a dyno with a A/F monitor and I put 3k on it this past year so i dont drive it much anymore. My other legend has 190k on it and at about 175k the HG started to be a problem. I run an open thermostat and keep water full in the summer and 50/50 in the winter, it stays cold. temp fix. IT does eat up gas a lot more. it was regularly maintained by the only other previous owner.
I do belive that cars better maintained last longer, but weather conditions play a big part maintained or not. Also Legends 91-93 in paticular have the internal cooling system do a lot of extra stuff thats not needed, eventually causeing heat to build up in case of an air bubble or loss of coolant. the early 2nd gen legends ran coolant to the oil cooler and DIff of all things.Great idea but, it would build up heat, beacuse it made the system more prone to air pockets or loss of coolant, that heat eventually takes a toll on the composite HG. The new legend engines have it all capped off and the oil pump cooler is removed. same with the RL block. Speaking of excessive, they put a cooler for the power steering.
Look for a copper HG that will bond to aluminum and that can be imprinted, because of me hussy copper has the template to make another set of HG if you want to try them your self. it only 85 bucks.
~TRu Hybrid