oil pump delay

[i8av8]

upon cold start i get tapping at the valve covers for about 1 second. it has done it since i bought the ty. never really noticed or payed attention to it but now it is getting on my last nerve. i just noticed this morning that when the tapping begins, according to the stock oil pressure gauge the needle stays down while tapping is there/heard and when the needle goes up to about 60ish psi. the tapping stops. only does it at cold start and not while driving or idle.

is this normal or is this a sign of oil pump failure? i personally don't think it is failure since the ty has done it since i bought it just over a year ago, but i could be wrong. since i bought it i've only used royal purple 10-30. thought i could get rid of tap by changing weight to 15-40. no dice. and because i may be losing my royal purple connection i might have to go with mobil 1 now. any thoughts? no appointment necessary.

 

[1madgumby]

Re: oil pump delay

60 psi seems pretty high, might be the lifters are shot. Do you know what oil pump is in it?

 

[i8av8]

Re: oil pump delay

60 psi seems pretty high, might be the lifters are shot. Do you know what oil pump is in it?

the 60ish psi. is just a guess. it goes to the 3/4 mark only at cold start then drops a little when warm. sorry, i don't know the pump. the motor was rebuilt before i bought the vehicle. it has the vortec heads and larger valves w/412 cam, according to the guy that sold it to me. if that makes any difference

 

[Syclone#2960]

Re: oil pump delay

I needs my purple stuff. Whats going with the connection? Moving out?

 

[Syclone#2960]

Re: oil pump delay

upon cold start i get tapping at the valve covers for about 1 second. it has done it since i bought the ty. never really noticed or payed attention to it but now it is getting on my last nerve. i just noticed this morning that when the tapping begins, according to the stock oil pressure gauge the needle stays down while tapping is there/heard and when the needle goes up to about 60ish psi. the tapping stops. only does it at cold start and not while driving or idle.

is this normal or is this a sign of oil pump failure? i personally don't think it is failure since the ty has done it since i bought it just over a year ago, but i could be wrong. since i bought it i've only used royal purple 10-30. thought i could get rid of tap by changing weight to 15-40. no dice. and because i may be losing my royal purple connection i might have to go with mobil 1 now. any thoughts? no appointment necessary.

Might need to reinstall your rockers with a full turn from 0 lash.

 

[i8av8]

Re: oil pump delay

I needs my purple stuff. Whats going with the connection? Moving out?

the guy got all gurly on me. he was the one that told me i could get the case for $xx amount. this last time i axed him he just hesitated and i took it as "i guess i'm axing him too often?" think he wants me to set up an account

 

[i8av8]

Re: oil pump delay

so none of yous guys thinks it's my oil pump.

what would adjusting my rockers or lifters do? i mean, i hear them right at start up until the oil gets pumped (needle goes up) and then it goes quiet. yous guys would know better than i.

 

[Upgrade]

Re: oil pump delay

WAG- some filters have an anti drain back feature. What oil filter are you running?

 

[Don W.]

Re: oil pump delay

X2 Make sure you have a filter with an anti-drainback valve. Also based only on my truck I wouldn't trust the oil pressure ga. Hard to tell but there's close to 20# difference between my Syclone ga and my "real" mechanical ga.

IMO If the rockers were not adjusted properly you'd hear them with the engine hot.

 

[i8av8]

Re: oil pump delay

mobil 1 extended performance
part # m1-201

still using royal p and the oil level is full, according to dip stick.

also, the tapping does go away after the (needle goes up) split second.

 

[Upgrade]

Re: oil pump delay

I had a hyd flat tappet cam that would do that for almost exactly 9 miles 80% of the time each morning.
I gave up after several valve adjustments hot and cold and put a solid cam in....
My new nissan v6 did it and only one bottle of slick 50 made it go away.
You may have a bad lifter or two. I was told to try a bottle of Reslone for the hyd cam but never did due to other issues.

 

[ghettosled]

Re: oil pump delay

It's just the lifters taking a sec to pump up.. You could replace them, or just let it be since it probably wont do any harm.