454 rebuild problem. 6 psi oil pressure.
#1
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454 rebuild problem. 6 psi oil pressure.
Before I pull the motor back out to put another oil pump in I'm looking for some ideas. I went to break in my new rebuilt (by me) 454 yesterday and got only 6 psi oil pressure. It runs great with no noises, but as soon as I saw the oil pressure wasn't registering I shut it down. First thing I did was put a mechanical gauge on. Same thing. Next I pulled the dizzy and put a pump drive tool on and spun it with my electric drill for quite a while. Same thing. 6 psi max. I pulled the gauge adapters from the back of the block to verify there wasn't anything plugging them. Clear.
Even though I knew they were in, I went back through my pics and verified the gallery plugs are in. The only thing I modified was I drilled a small hole in one behind the timing chain for a little extra oil lubrication. I was thinking about pulling the remote oil filter off and putting a regular oil filter on to remove that from the equation.
Any other ideas?
Even though I knew they were in, I went back through my pics and verified the gallery plugs are in. The only thing I modified was I drilled a small hole in one behind the timing chain for a little extra oil lubrication. I was thinking about pulling the remote oil filter off and putting a regular oil filter on to remove that from the equation.
Any other ideas?
#2
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what were your bearing clearances?sound like they could be off.also,that drilled hole looks awfully big.
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#3
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I have read of people putting the lines to the remote filter on backwards and having no to low oil pressure. Just a suggestion to check the lines.
#4
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Bearing clearances were in spec. Mic'd them. No plastigauge used. Crank only had to be polished and was oe. The plug I drilled the hole in should be ok. I did the same thing on the motor for my 69 and I have plenty of oil pressure. I like the idea of the reversed lines, but they really can only go on the remote adapter one way if I remember right. Two different fittings. I think it's possible on the cooler, but I think that's free flowing right?
#5
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This is the one in my 69. It's also an L29 block.
#6
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did you braze or tig the pickup to the pump ?..........years back I had an engine installed and they did reverse the lines at the filter head, lifters rattled like crazy
The following 2 users liked this post by carnutsx2:
Johnsgarage (05-24-2021), kvogt (05-18-2021)
#8
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I'll move the oil filter from the remote housing to the block just to check the pressure and see if it makes a difference. I'll double check that I removed the center bypass and installed the other bypass at the same time. I remember doing it, but it'd be good to triple check.
I like the thoughts guys. I appreciate it. Please keep them coming.
#9
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I'm starting to think it might actually be a pinched remote filter line. It's a tight fit and hard to see down that side. When I still had the engine on the stand and spun the oil pump with the priming tool I got a big oily surprise where I didn't tighten one of the hoses on the filter adapter on the block. That tells me I had plenty of oil pressure at that time and nothing changed from then except me installing the FWC and installing the motor in the boat. I need to look closer before I start getting pissed at myself... I could see it getting pinched near the power steering pump/oil cooler.