I have a freshly rebuilt blown 555 from day one of running it my oil temp was running about 10 to 15 degrees higher then the other motor even at cruising speed. Also after new rebuild my water pressure is higher I'm sure maybe something is clogged but I'm stuck and can't figure it out. Can anyone help?

what is your water pressure and oil temp at?

The water pressure was getting up to about 30 lbs then I screwed the valve all the way out then it started blowing off at around 22-23 lbs. The oil temp gets up to around 210

210 is high in fact... Mines are always 180 or less, most time 150 to 160
Cant help more...

Ok well thanks anyway

210 is high? I ve never heard that as a matter of fact 210 sounds perfect so as to boil off any water. Thats what I have been told so dont take this as gospil

210 isn't even close to being high. Should be over 212 as drpete3 says to boil off water/moisture in the oil.

Ok thanks. One motor only gets up to around 180 and the same motor that I just had rebuilt use to run at the same temp it's just after the rebuild it started running higher so I thought maybe something was wrong

I called an amsoil rep once and he told me they don't recommend going over 220*...."it will handle it but for short bursts"...I found that a little hard to believe..... now i personally don't like seeing it higher then 250...reason being the main bearings can be upwards of 40* hotter then the oil on the pan...i have a buddy that does autocross and they are consistently seeing temps in the 260* range in their engines (turbo 4cyl) with no ill effects. The oil itself will easily take 300*+.....its the additives that start breaking down in the higher temps. I think that conventional oil has a flash point around 350* and synthetics are around 400* maybe higher...

Thanks. My only concerns came from the difference in the temp change after the rebuild.