Oil problem I think

I have a 83 308 qv. and just did a cam belt replacement. When the engine runs bout 2-3 minutes the valves will start to clatter like no oil is getting to them but the oil gauge reads 85 psi. What did I do... Is there any part of doing a cam belt replacement that will affect the oil system???

The Cam Belt change has no effect on Oil Pressure. The Oil Pump & System is completly seperate & independent from the belts.

Double check your cam timing marks to insure they still line up. On 4V's you can do this from the outside, after finding TDC on the Flywheel by pulling he cover plate.