noisey valves...

[1990quadgtz]

hey there... on ths 90 gtz quad4 i got about a month ago. the valves are starting to get a little loud.it has plenty oil .... oil pressure guage is pegged out.... goes there once i start it.. they were not as loud when i got it..it starts perfect has great power no misses or anything... revs past 7000 though i've only done it a couple of times. i read through some of the past posts and someone recomended lucas oil treatment...car has 126000 miles but engine has about 15000 on it...

what do you think??    thanks

[docrodg]

Could be the valves have been hammered on the tops and need replaced.  Also, with the over-rev you could have bent some of them.  Also the cam could be messed up or the rockers jammed up.  Try a good oil flush, then take off the covers and check the cam and rockers and valves.

[1990quadgtz]

any other ideas......that seems like alot considering it still runs real good. isn't there a rev limiter on this engine. someone i thought said 6750 once.i know that is the redline. but it has never cut out on me..if yall think that is the problem. then i look into it more...

     thanks alot

[docrodg]

THere is a limiter in the ECU but I believe that it is speed controlled.
T

The oil pressure seems high too, Unless someone put in a high pressure pump.  That would point to a problem with the oil flow.