• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
tapping sound after warm up
#1
Hey guys, I bought a 351c 2v fully rebuilt from a respectable ford fan who has like 12 cars, couple fully finished. Well I checked the motor out ,it has mild cam rebuilt heads new lifters bearings and so on, once rebuilt it sat for about 10 years before dropped it in my car last year. It made tapping sound all the time at first, so I thought that it has solid lifters but no I checked it has hydraulic lifters. Now it starts up smooth, but after driving a block its starts tapping. Could it be that one of the lifter went bad due to storage? Oil pressure is perfect, rockers are tight & aren't adjustable. If I just change the lifters only, will that ruin the lubes on the cam? It has RV cam, is that like a mild cam? Any help would be greatly appreciated.
  Reply
#2
probably just a sticky lifter. I'd drive it and see if it stops.
  Reply
#3
If the engine sat for ten years and was then started the assembly lube may have gone bye bye. Was the cam broken in properly on initial start up? My guess is you probably have one or more flat cam lobes and/or damaged lifters.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
  Reply
#4
Yes the RV cam is mild, they are designed to build torque. Remove the rocker covers and look for the amount of travel @ each rocker / valve spring. Compare the travel for all the exhaust valves then the intakes, they are most likely different. If you find 1 or more that do not move the same amount you have a wiped cam. Look for oil coming from each pushrod / rocker. Check the rockers when the valves are closed, you should not have any clearance in between the valve and rocker. Also some old school builders would shim the rocker stands to reduce the amount of preload on the lifter. I hope this helps.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
  Reply
#5
Guys, thanks for your input. Found liters were either stuck or bad, replaced them all, adjusted the timing. Car is quiet as it can be & runs smoother.

Thanks again guys.
  Reply
#6
sharpstang72;19619 Wrote:Guys, thanks for your input. Found liters were either stuck or bad, replaced them all, adjusted the timing. Car is quiet as it can be & runs smoother.

Thanks again guys.

coolgoodjob
  Reply
#7
Running on all cylinders NOW. Way To Gogoodone

[Image: 1_30_09_13_10_12_32.png]
Alan L
  Reply
#8
Another satisfied customer courtesy of 7173mustangs.com. Cool

Smile

Doc

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
#9
Just makes ya feel all warm and fuzzy inside, eh Doc? LOL!!

Congrats on getting your noise squared away - glad it wasn't too serious!

Eric

[Image: mach1sig2.gif]
  Reply
#10
LOL...

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  Engine buffs: why do our engines need to warm up? Vinnie 21 1,066 07-10-2018, 06:00 PM
Last Post: Blue Mach 429 CJ
  WOW! how do you get this sound?!?! scgamecock 7 905 09-14-2016, 12:28 PM
Last Post: Hemikiller
  Power loss and knocking sound cil 3 Beenie 8 706 07-22-2016, 11:54 AM
Last Post: Beenie
  Strange blowing/sucking air sound when in P thomas1984 7 943 07-09-2016, 03:35 AM
Last Post: thomas1984
  Extremely annoying loud whining sound Odmark 10 1,132 07-02-2016, 03:19 PM
Last Post: Don C
  New unknown sound vozaday 15 1,546 06-26-2016, 12:30 PM
Last Post: vozaday
  Name that Sound - engine noise? wpdj61 8 1,836 08-17-2015, 11:50 AM
Last Post: Jim and Jutta
  HELP NEEDED TICKING OR KNOCKING SOUND Salhi_amer 109 12,875 05-13-2015, 07:34 PM
Last Post: Mike429cj



Users browsing this thread: 1 Guest(s)