engine tapping

PrplePpleEater4 · 08-08-2008, 04:10 PM

I bought a '95 mustang with a 351. The care only has 40,000 miles so the engine has done a lot of sitting. i have had several problems mostly being dry-rotted hoses and gaskets. the other day when i was driving and i downshifted a loud tapping noise started coming from the engine. ive pulled it apart and the push rods look fine. the noise doesnt get louder as i accellerate so i dont thinks it a bearing. the only other thing it might be is a collapsed lifter. i was just wondering if any of yall might have any other ideas?

REDHOT86 · 08-09-2008, 06:55 PM

One time my suv was making a taping noise and it turned out my harmonic balancer was falling apart. It made the noise for a few weeks before it finally came apart on me.I had spent a lot of time trying to figure out what it was, then it broke one day while I was driving. These 5.0's are known for balancers breaking and even ruining the engine because of that. I hope that helps. -JM

thatdavidkid · 08-09-2008, 08:39 PM

if you've got the intake off, check the lifters... and/or replace them... you can find lifters (i'm talking about hydraulic rollers) for really cheap... i've got 2-3 sets for less than $100. check that ballancer too. if all of those seem ok, it's time to get a stethescope and see where it's coming from.

CraZy6 · 08-09-2008, 11:25 PM

replace the lifters

2k4mk1 · 08-10-2008, 08:43 AM

If it has done alot of sitting Im betting it is a stuck lifter.
Fire it up withthe v/c's off and see if 1 rocker isnt moving or is loose while it is running.

myblack93gt · 08-11-2008, 10:33 PM

i thought it was the lifters too, but there was a mild tap coming from them so i replaced all 16, and that wasnt too long ago. Do they require break in time?

91mustang5.0j · 08-12-2008, 03:50 PM

Quote:

Originally Posted by CraZy6

replace the lifters

x2 i had that preoblem in my 91 replace the lifters an fixed the problem

08-08-2008, 04:10 PM	#1
PrplePpleEater4 Registered User Join Date: Jul 2008 Location: Houston Posts: 17 Trader Rating: (0)	engine tapping I bought a '95 mustang with a 351. The care only has 40,000 miles so the engine has done a lot of sitting. i have had several problems mostly being dry-rotted hoses and gaskets. the other day when i was driving and i downshifted a loud tapping noise started coming from the engine. ive pulled it apart and the push rods look fine. the noise doesnt get louder as i accellerate so i dont thinks it a bearing. the only other thing it might be is a collapsed lifter. i was just wondering if any of yall might have any other ideas? __________________ All show and no go

08-09-2008, 08:39 PM	#3
thatdavidkid looks mean, workin' on the fast Join Date: Oct 2006 Location: Denton Posts: 3,901 Trader Rating: (1)	if you've got the intake off, check the lifters... and/or replace them... you can find lifters (i'm talking about hydraulic rollers) for really cheap... i've got 2-3 sets for less than $100. check that ballancer too. if all of those seem ok, it's time to get a stethescope and see where it's coming from. __________________ 1991 lx coupe t-5 swap, billit quadrant, upr firewall adjuster, steeda tri-ax, custom jb tool and fab one off subframe connectors, 8.8 w/posi and 4.10's with 5 lug axles, tubular upper control arms, southside lowers, and pbr twin piston front calipers with "snowflake" wheels

08-09-2008, 11:25 PM	#4
CraZy6 Registered User Join Date: Jun 2003 Location: Corpus Christi,TX Posts: 830 Trader Rating: (0)	replace the lifters Last edited by CraZy6; 08-10-2008 at 10:00 PM.

08-10-2008, 08:43 AM	#5
2k4mk1 DONT HATE ME CUZ YOU AINT ME!!!! Join Date: Dec 2003 Location: SanAntonio Posts: 6,376 Trader Rating: (2)	If it has done alot of sitting Im betting it is a stuck lifter. Fire it up withthe v/c's off and see if 1 rocker isnt moving or is loose while it is running. __________________ 04 Oxford White MACH1,5 SPD with IUP,K&NAircharger Borla Stingers,SLP Catted X pipe,Tri-ax,SCT Flashtune,Max Mtr Spt 4 bolt adj C/C plates, Drilled/Slotted rotors all 4 corners 281 rwhp on Mustang Dyno,306 rwhp on a Dynojet 94 Black Lightning Daily Driver&85GT FACH1 Project under construction

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread:

08-11-2008, 10:33 PM	#6
myblack93gt Registered User Join Date: Mar 2006 Posts: 736 Trader Rating: (0)	i thought it was the lifters too, but there was a mild tap coming from them so i replaced all 16, and that wasnt too long ago. Do they require break in time?