ok, 1Z main bearings are £19 a set
PD mains are £84 a set
they are the same size, infact ive used a set in my 2.0 block, they feel perfect, can anyone see a reason why i should pay the extra to get the PD ones? 1Zs never suffer with mains, im about to thow my engine in and dont wana bother if sumone has a bad word to say about doing this
talk to me
If they mic the same thickness and have the same dimensions there is no reason you couldn't use them. They are a babit bearing that is just lead with backers. Maybe a little more than that, but as long as they are the correct size I don't see an issue. I can't tell you to run it if it is 2 different part #s though, just to be safe. If you have already done it in a similar engine though you should be fine.
No OEM uses lead for bearing material anymore. NO ONE. Most are some combination of aluminium/copper/tin/zinc/antimony.
Rich, you ALWAYS get what you pay for. 4-layer sputter bearings, high-tech stuff, mucho ££££££.