Hello, I just rebuilt my 302, I had about 850 miles on the car when I lost oil pressure. I used a oil primer shaft before I started it for the first time and had 70 PSI. Hit the starter and fire right up with 70 PSI. I have never had this happen before. I have done about 8 engine over the last 35 years. Can you help? Thanks Tony in Venture
ouch.. that sucks. If you pull the timing cover.. you'll likely discover that you popped an oil galley plug. PS. if the engine stalled out during the pressure loss?.. you may have sheared off the disty's gear roll pin. Which is obviously a much easier fix than the above.
Hello. I pulled the timing chain cover and pulled my dizzy, used my oil primer and hook up a oil pressure gauge and it read zero. No leaks at any of the oil plugs. My oil filter was dry when I pulled it I just pulled the pan and found metal flakes. Engine will have to come out. When heard the lifters I was doing 70 mph and it took about 2 minutes to get it off the freeway. Called AAA for a tow. Tony
Even if the cam bearings were bad, he'd have some oil pressure. He says there's "zero". Something else happened in there.
Yep. Pressure would have steadily declined as the bearings got chewed up. My next best guess would be broken pump shaft(often times they break at the thinnest part that inserts into the pumps gear shaft or the distributor shaft end) or the pump housing itself(usually where the pickup bolts on but sometimes the actual housings mounting boss(housing standoff) itself). Sometimes the cracks are hard to see. And if that is in fact the problem here?.. it teaches that chrome-moly pump shafts are extremely cheap insurance in the long run. And absolutely mandatory on high pressure/high rpm setups. Sorry to hear about the misfortune.. best of luck with it all.
Hello, I had new cam bearing installed. I used a new melling HV Pump and the drive shaft that came with the pump. I have started the tear down. I pulled # 4 rod cap. The crank and bearing look great so far. I pulled the rockers, push rods and lifters everything looks great. I'm sending the pump back to summit racing. If is the pump they will pay for anything that was damage. I have heard it both ways, With just 850 miles ,can I just pull the piston and rings to check the cylinder wall(if no damage) and the re-use the rings? I'm going to pull all the oil galley plugs and have the block hot tank. Tony
i was thinking the hv pump may have twisted and broke the pump shaft. but it sounds like you already pulled it. did you take the bottom plate off the pump to see if anything was wrong in it? the pump is a very simple thing. it only has 2 moving parts.
hello, I called Meling they ask me not to touch the pump and just send it summit racing. I should have the engine apart by the end of tomorrow. Tony
Did you run all the oil to the top of the engine with the high volume pump and starve the bottom end. I won't put a HV pump on a stock pan motor and without doing some drainback work. I don't think you need a HV pump for 90% of the applications. I run circle track motors with stock pumps to 7700RPM in dirt modifieds and never have a problem. SPark
Hello, I have a boss 302 oil pan and pick-up. I have used HV Pumps for over 35 years with out a issue. I have done Drags racing, open track and heavy street driving. We go with what works for us. My goal was to have around 325 HP, 300TQ, I]m getting close to retire in 07-12-2016 and want to run drag week. I should be able to run 13;50 at around 105 MPH. So this was a big step back for my project. Good Luck to you in your circle track racing. Tony
I had a relief valve stick in an oil pump before. This will result in no oil pressure. I'd do what the company wants and send the pump back unopened. I would request them to tell you what happened to it when they receive it, though. Not knowing what failed would drive me crazy!
Hello, my HV oil pump never went over 65 PSI. This is the letter I sent withe Pump. It was pick up today. ATT: Rene Conner 06/23/2014 Dear Sir, I purchase your HV oil pump (MEL-M68HV ) from Summit Racing on 02/14/14 invoice number 9862320-7. I spent $ 1415.75 on machine shop service and parts from Fain’s automotive Machine Shop 1200 Callens Rd Ventura Ca 93003 phone number 805-642-6677. BAR #AM 121705 invoice number 3212 I did the assembly. Before I started my Ford 302 I used oil pump primer and recorded an oil pressure of 65 psi. I had no oil pressure issues until 06/14/2014. It was always 60PSI. (I have about 600 miles on the engine). I was doing about 70 mph when I heard my lifters and had zero oil pressure. It took 3 or 4 minutes to get out of the fast line and on to the shoulder. Called AAA for a tow home. I pulled the dip stick and oil was full. I pulled the Dizzy and used my oil pump primer and had zero oil pressure. I started taking the engine apart. All oil galley plugs were intact. Took my 302 block for inspection and was told it may take 060 thousands over. I had the block bored and honed to .030 before What I found 1. Block needs to be replaced. Cylinders #4, #6 and #1 have ridges 2. Piston # 4,#6, and #I are Black with ridges . 3. Cam bearing has dark spot 4. Cam and lifters look bad with rough spots. It is a Crane HV272 HYD 5. Metal shavings throughout oil pan and block . What I will need 1. 3 cast 030 pistons 2. Set of Rings 3. Rod bearing 4. Cam bearings 5. Main bearings 6. Full gasket set 7. Core and oil galley plugs 8. Total # 1-#7 from Summit sealed power kitt- $313. 00( there are 8 pistons in this kit.) 9. Crane Cam and lifters HV 272 $210.00 from summit 10. Used 302 BLOCK $250.00 11. Machine work $275.00 12. My labor $200.00 Anthony Scherer 805-323-5290 Cell 805-258-9824 Anthony. Scherer@dcma.mil
Mine snapped the oil pump shaft, because a piece of silicone got sucked thru the screen & seized the pump. I bought a heavy duty shaft, under $20 & put a finer mesh screen. I only had 20 miles on the motor at the time...
