I could go either exhaust or lifter. Did you pop off the pass side valve cover and check it out?
You all are very helpful and I’m feeling much more confident that nothing too devastating is going on. But before I get too confident here is a video of the oil pressure gauge at idle and when I bump the gas.
Yup, nothing wrong with that at all.to me thats normal
I played around with it tonight. Sounding more and more like lifter(s) to me. I have a few more things I want to try that some of the fellas on here recommended. Hopefully get to it over the next few days.I could go either exhaust or lifter. Did you pop off the pass side valve cover and check it out?
Makes sense. Definitely something to look for when I disassemble it. What did you use to reference that kind of wear?Pulled the 361 out of my 64 Fury and upon removing the rocker assemblies I found that each rocker was worn over a 1/4”. The engine only had a little over 61,300 miles on it but had very poor maintenance done on it. Had to consider the loss of lift due to rocker wear and overall performance of the engine after finding this problem.
First I would make sure it's not an exhaust leak.Get ya a couple of old sheet metal valve covers and cut the tops off so ya can see what’s going on with the engine running.
Hi Volume over Hi Pressure. High pressure pumps can over power the rear main seals. Ask me how I know....Good afternoon and Happy 4th guys. First time caller, long time listener LOL. Hopefully positing this properly and in the correct area. If not please someone let me know.
‘69 Roadrunner 383 I’ve owned for a couple of years now. Toward the end of last season I started to notice a tick/knock after she’s warmed up. More prevalent this season. I suspected an oil pressure issue so I installed some aftermarket gauges below the dash to better observe what’s going on. She only came with a warning light from the factory. On the maiden voyage today she was reading about 80psi on cold startup. After driving for 10-15 minutes the pressure dropped to below 20psi at idle. I’m suspecting a failing oil pump. Any recommendations for the new pump? I see high pressure/volume options and wondering what you guys who may have some experience here would recommend. Any input is greatly appreciated. - Nick
I checked the rocker assemblies when the engine was cold then loosened the rocker shafts until the rockers were free of pressure…… I was shocked how worn they were. Interior of engine was pretty bad including evidence of pure water cooling with no antifreeze which caused much corrosion on internals including passages in the block. New rocker assemblies were installed on a replacement engine making sure they were positioned correctly. The car had come from California via Las Vegas.Makes sense. Definitely something to look for when I disassemble it. What did you use to reference that kind of wear?
Well, had some time when I got home tonight. Pulled both valve covers and did as suggested. Checked rockers and rotated crank 90 degrees, 7 more times each time checking again. No vertical play however some were more tentative than others for side to side movement, sounding very much like what I’m hearing when the engine is hot. When I spin the push rods under those particular rockers that have some side-to-side play, those push rods feel choppy. Not a smooth spin like the rest. I pulled and checked some in the recent past that felt like this, and they rolled straight on the table. No obvious evidence of being bent. Also, each rocker has a good amount of oil on top of the lower portion of each one.First I would make sure it's not an exhaust leak.
Second I would just take off the covers check all the rockers, roll it 90 degrees check again do that 7 times.
Easier and less messy than doing it running.
Just my thoughts.
Now that I reread your post here, I’m wondering if the rocker dimple may becoming oval, hence creating a pinch point making the push rod feel choppy when rotating. I will check that.I checked the rocker assemblies when the engine was cold then loosened the rocker shafts until the rockers were free of pressure…… I was shocked how worn they were. Interior of engine was pretty bad including evidence of pure water cooling with no antifreeze which caused much corrosion on internals including passages in the block. New rocker assemblies were installed on a replacement engine making sure they were positioned correctly. The car had come from California via Las Vegas.
Some the rockers were actually worn oval shaped, I have photos on my computer which I will post so you can see what I mean. Hope this helps you!View attachment 1315495View attachment 1315497View attachment 1315498View attachment 1315501
N)No shiny stuff in oil when changed recently
Do you have an FSM. May wa to take a look at the vehicle specs. You may find the standard oil pressure when hot is around 15-20psi. What is the oil pressure at speed, say at 60mph? As far as a ticking sound, you may have sticking lifters. Usually caused by varnish buildup especially with a motor that sits idle a lot. The lifters seem prone to that buildup.Good afternoon and Happy 4th guys. First time caller, long time listener LOL. Hopefully positing this properly and in the correct area. If not please someone let me know.
‘69 Roadrunner 383 I’ve owned for a couple of years now. Toward the end of last season I started to notice a tick/knock after she’s warmed up. More prevalent this season. I suspected an oil pressure issue so I installed some aftermarket gauges below the dash to better observe what’s going on. She only came with a warning light from the factory. On the maiden voyage today she was reading about 80psi on cold startup. After driving for 10-15 minutes the pressure dropped to below 20psi at idle. I’m suspecting a failing oil pump. Any recommendations for the new pump? I see high pressure/volume options and wondering what you guys who may have some experience here would recommend. Any input is greatly appreciated. - Nick
Yes the sound in the video doesn't fully capture what I've been trying to explain. I have since zeroed in on the fuel pump as being the ghost I've been chasing. Very evident when I put the stethoscope on it. The valve train has been eliminated as the culprit.Videos are deceiving.. but man it sure sounds like an exhaust leak. Need to run a hose from your ear to around every port/flange.
Are those original 67 440 magnum chrome valve covers??? OH THE HUMANITY