bigmal 225 Report post Posted May 12, 2019 Hi guys, I rebuilt my 351C around 500 miles ago and it has been running great. Specs; .020, 10:1, mild cam, 600 Holley. Nothing spectacular. The noise sounded initially like a water pump but putting my head near the engine it appeared to be coming from the power steering pump. I bought a second hand pump and put it on and the noise is still there. I have now taken the belt for power steering and water pumps off and the noise is still there. It only makes the noise once the engine has warmed up. Disappears again when cold. Any ideas where to start? Thinking a rocker near #5 of timing gear but the noise doesn't quite fit that. IMG_2271.MOV IMG_2271.MOV IMG_2272.MOV Quote Share this post Link to post Share on other sites
1969_Mach1 333 Report post Posted May 12, 2019 Maybe the fuel pump? I have heard fuel pumps make that type of noise. Doesn't sound like valvetrain. Do you have a mechanics stethoscope? 1 bigmal reacted to this Quote Share this post Link to post Share on other sites
bigmal 225 Report post Posted May 12, 2019 I am just about jumping in the air. I recently bypassed the engine driven pump as I fitted an electric pump. I have left the pump hoses off and this is probably what I can hear. No time left this weekend but I can't wait until I get into it next weekend. Thankyou! Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted May 12, 2019 2 JayEstes and bigmal reacted to this Quote Share this post Link to post Share on other sites
JayEstes 172 Report post Posted May 13, 2019 5 hours ago, RPM said: +1 1 bigmal reacted to this Quote Share this post Link to post Share on other sites
bigmal 225 Report post Posted May 13, 2019 8 minutes ago, JayEstes said: +1 Thanks, I got one today. 1 JayEstes reacted to this Quote Share this post Link to post Share on other sites
bigmal 225 Report post Posted May 18, 2019 On 5/12/2019 at 3:31 PM, 1969_Mach1 said: Maybe the fuel pump? I have heard fuel pumps make that type of noise. Doesn't sound like valvetrain. Do you have a mechanics stethoscope? You nailed it. So grateful I thought I was up for another rebuild. I took the old fuel pump off and blanked the hole. Quiet as a mouse. Thanks. 1 JayEstes reacted to this Quote Share this post Link to post Share on other sites
JayEstes 172 Report post Posted May 18, 2019 fantastic news! 1 bigmal reacted to this Quote Share this post Link to post Share on other sites
1969_Mach1 333 Report post Posted May 18, 2019 Great news. In your video, it sounded like the old familiar fuel pump noise. 1 bigmal reacted to this Quote Share this post Link to post Share on other sites
