Cam swap and no oil pressure AFTER intial start-up
01-01-2007, 11:39 AM
#21
TECH Senior Member
iTrader: (1)
Join Date: Jan 2003
Location: Armpit of East TX
Posts: 9,342
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 02Reaper
sounds like the pressure relieve valve in the oil pump is stuck. happened to me a couple of years ago on my first cam swap. probably need to put a new oil pump and o ring on it anyway with that many miles while your in there for added insurance.
01-01-2007, 12:52 PM
#24
formerly silverbrick (changed 02/17/2013)
iTrader: (5)
Join Date: Mar 2006
Location: Pasadena, Tx
Posts: 4,525
Likes: 0
Received 0 Likes
on
0 Posts
I am sure this has already been checked out but what if youe oil pressure sending unit went bad at that moment and sent a zero pressure signal? i am an optimist... but it usually bites me in the *** anyways.
01-01-2007, 04:02 PM
#25
Well, remember that if anything gets dropped down into your engine and makes it to the pan (dirt, pieces of bearing, etc) it has to go through the oil pump first before it goes through the filter. Regardless, its something to do with the oil pump or you would have some kind of pressure. My oil pump wasnt touched either and it happened.
Originally Posted by 1slow01Z71
Well we didn't change the oil pump or timing chain so that's why Cody and I are doubtful it's that. We are a little worried that some dirt somehow got internally into the engine, but there's no way of knowing until it's torn down I guess.
P.S.-This is RandomHero on Cody's name
P.S.-This is RandomHero on Cody's name
01-01-2007, 05:35 PM
#27
here's the update- I tear everything down and realize I didn't torque down the 5 of the 16 rocker arms to spec. I decide to do that put everything back together(against Cody's thought that it had nothing to do with those. It didn't work
Now I am reading a tiny bit of oil pressure. I don't know if it's just the guage that is doing it or what, but it is reading to the first notch on the guage.
I sure hope it is the oil pump and not the cam bearing because that would mean I'd have to get my cam fixed and I'd have to pull the motor to swap a new block in(putting a new bearing in isn't worth it)
Now I am reading a tiny bit of oil pressure. I don't know if it's just the guage that is doing it or what, but it is reading to the first notch on the guage.
I sure hope it is the oil pump and not the cam bearing because that would mean I'd have to get my cam fixed and I'd have to pull the motor to swap a new block in(putting a new bearing in isn't worth it)
01-01-2007, 06:03 PM
#28
Ill make the judgement call tomorrow when I pull the cam out and look at the journals. I honestly just dont see how the pump was working and the engine had good oil pressure then after I revved it up to try and get the lifters to pump up the engine lost oil pressure.
What should I look at on the oil pump to see if it failed? Obviously take it apart and look at the rotor and housing but what else?
What should I look at on the oil pump to see if it failed? Obviously take it apart and look at the rotor and housing but what else?
01-01-2007, 06:08 PM
#29
Originally Posted by onebadrubi
Dirt isnt gonna spin that bearing that quick. I would think it would cause other problesm before spinning a bearing anyways.
You realize the bearing tolerance on the cam is all of about the size of a **** hair, if any dirt got knocked into the top of the heads it drains right onto the lifters which goes right onto the cam which coincendently just happens to be right by the cam journals. A little spec of dirt can get in between the journal and bearing which creates friction between the two surfaces causing them to gauld and spin the bearing out of it oil journal. Please dont post if you dont know what you are talking about. Dirt spins bearings period, why do you think it is so pertanent to change the oil after doing any work on the motor?
01-01-2007, 06:49 PM
#30
Originally Posted by 1slow01Z71
Ill make the judgement call tomorrow when I pull the cam out and look at the journals. I honestly just dont see how the pump was working and the engine had good oil pressure then after I revved it up to try and get the lifters to pump up the engine lost oil pressure.
What should I look at on the oil pump to see if it failed? Obviously take it apart and look at the rotor and housing but what else?
What should I look at on the oil pump to see if it failed? Obviously take it apart and look at the rotor and housing but what else?
Take the relieve spring and plunger out also and check it out. It being jambed is probably the reason for this, although it may not show it after it has been taken apart. Put a new oring in also, even if the old one looks okay.