Break In Disaster????????

nm9stheham said
With 10W30, 85 psi seems too high for a standard Melling pump. So did you rev past 2300 and see what the pressure did, or are you saying that the pressure leveled off at 85 psi for RPM's higher than 2300?

Time to check with another gauge IMO, and check at yet higher RPM's to see if the pressure keeps on climbing. The 85 psi is a potential concern (to me) for something not right around the relief spring in the oil pump. Yes I would suspect the oil pressure is a possible issue for the rocker; the other prime suspect is a fully grooved cam bearing, or something around the rocker shaft hole.

BTW, did you check the hole diameters in the rockers? They should be .375". (3/8") As I understand it, the rockers are the same with and without banana grooves.

Ok, so heres what i have found out as of today. I drove it to work today because i only live 2.5 miles from work and it stayed pretty much 75, but on the way home i took it to the muffler shop around the corner and to get gas and i assume it was to temp because it dropped to 45 at idle but the slightest raise in rmp and it went right back to 70. I got it up 65 at about 3000 and it didnt pass 80 lbs so its a bit more confussing i guess. Also, i tried new gaskets with sealer and letting them sit overnight and this thing is still leaking out of the back of both valve covers, im not sure what else to do????

Jake

Cudafever said
I would check for burs or nicks in the washer and shaft. if it's good and still leaks, buy some brass shim stock, cut to fit and install. if there is no crack in the shaft at the bolt hole, problem solved.

The oil pressure is high BUT, my last eng. hand 80 at idle cold and around 65 when hot. rev it up when eng was hot and it would still go up past 80(my gauge only when to 80) ran that way for years(was running 20w50 oil) Ended up going to a synthetic 0w40

my 340 ran for 10 years on that high oil pressure, before i when to the thinner oil.

Personally i thing you ended up with a High volume pump, for the price of a stock one. that's what i had.

After you get it broke in, run a thinner eng oil and see what it does. BEFORE, you go pulling The oil pan.

Where would i find that?? Local?? I wonder if i did get a HV pump as well but cant get around this leeaking from the rockers. I might look into other shafts but i feel like the pressure is whats causing it to do that.

Jake