Not true, as you're rolling the dice and hoping you actually got a low milage and non abused 1J. If you spend that money on the 7M that you already have (unless it threw a rod, ect), you'd have a brand new fully forged motor that will take more abuse.This is coming from someone that wishes he went 2J-T.....
Yes, you make very good points. I hear many stories on how people with rebuilt 7m's seem to get a rod knock or bhg (even with a mhg) with less than 10,000 miles (estimating here) on the rebuild. This could either happen because of the owner not breaking it in right and using the right oil and coolant, or it could be the machine shops fault. I just figured since it will cost around the same amount, why not go with a 1j or any other motor. Don't get me wrong, the 7m is a very strong motor when built right but the chance is greater to get those problems, having to be exact and all. I did all of the maintenance and more on mine and it ran fine.. The previous owner left the bhg too long and the coolant slowly deteriated the bearings is my guess.. Other than that I haven't had any problems with it and I will not hate against it, like some do. I'm not arguing with you, you have been on here longer than me and probably know more about supras (this being my 1st). I want learn along the way, but also share my point of view and sometimes being proved wrong helps. In the end, there have been many more successful stories with the jz engines from my knowledge. I don't want to get bashed on for being wrong, if I am completely wrong you can let me know nicely. My 2 cents..