Question about 1994 Chevrolet S-10 Blazer

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Result of Valve Noise

Hello. Just wanted to thank you, your advice worked perfectly. It started right up after backing off on the rockers. I don't think there is any valve damage. Thanks again.

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I own a 1968 Imperial 440 V8. The intake valve push rod of the #1 cylinder bent and was causing knocking noise. I replaced it and the motor ran fine. The #1 cylinder started missing. Again it was a bent...


bent push rods come from improper movement of the rocker and valve
This can be from an incorrect length push rod-- some v8 engines run different lengths for inlet and exhaust
from rocker arm jamming on the shaft or rocker ball
hydraulic cam follower pumping up and jamming the valve spring to a solid block
bent valve stem above the valve guide
valve spring Colette moved or misplaced incorrect rocker for that valve-- some engines run different length rockers for inlet and exhaust
what to do-- if this engine was running all right for some time then the rocker can be omitted. if the problem has been occurring since the cold weather the the oil may be too thick and not allowing the follower to leak down properly
check the follower or replace it , change to a lighter viscosity oil for the duration of the cold weather
unless you have had a recent head change or other mechanical work done the problem will be in those areas.

Feb 21, 2015 | Cars & Trucks

1 Answer

Stalled the engine and now struggling to start and idle and making bad topend noise,as if valves are hitting pistons. Any suggestions?


If it starts then I would leave that possibility to last. I would remove the rocker cover and check the operation of the rockers as one may have slipped sideways and is not directly over a valve stem. t is also possible to check the valve timing with the rocker cover off. Turn the engine clockwise until the rockers on no 1 cylinder start to move watch these rockers and when you see no1 exhaust rocker start to come up then it will be getting close . Keep turning until you see the exhaust rocker stop moving up and the inlet no1 cylinder rocker start to go down. Move the crank back and forth until you get the position of movement either way moves either rocker. This is called valve overlap and if you look at the timing mark on the harmonic balancer pulley then the mark will be almost /on TDC
I would then run the fault codes as there may be other problems that caused the stall situation.

Aug 26, 2014 | 2006 Fiat Strada 1.6

1 Answer

Have a 2006 chrysler 300, 3.5 with loud ticking noise during acceleration, also experiencing loss of power. Replaced both rocker assemblies and performance improved but ticking is still there.


sounds like bad valve seats or seals do you have a oil pressure gauge on your dash.check the pressure.then check your return ports on top of the head thats giving you the problem see if the oil is returning to the oil pan.sometimes the return ports become blocked and the oil stays on top of the head.and see if the oil supply is making up to the head.hope this helps.mark

Feb 19, 2014 | 2006 Chrysler 300

1 Answer

I have timed my 86 gmc and now it backfires a lil bit and no matter witch was i turn the distributer it still backfires


if ticking noise is heard through valve covers inspect rocker arm clearance, inspect arms and push rods for wear. back firing could be a result of incorrect valve clearance

Oct 22, 2010 | 1984 GMC S-15 Jimmy

1 Answer

95 mustang valve train noise.. coming from top of valve covers.. dont think its the lifters.. could it be rockers.. loose or damaged.. whats the process of removing valve cover.. do i have to take off...


not hard and no dont need to remove intake will have to remove some things depends on which side your working on like air intake hose a wire or two might have to unbolt a/c/ if u have- could be rocker also check for dry push rod ,weak valve springs worn valve guide-

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1 Answer

93 festiva engine valve noise


You would have to read the tech manual to see if they are just shims or if the are a hydraulic type lifter. They would actually pump up with oil and hold slight pressure on the cam so there would not be the tappet noise associated with a solid lifter cam. Odds are they got gummed up and started tapping on you. Hopefully you marked the cylinders they came off of and placed them back in the same location on the cylinder head as originally installed. You don't want premature cam failure because of the mismatched wear patterns on the lifters. Good Luck, RAC

Apr 20, 2009 | 1992 Ford Festiva

1 Answer

No compression! additional comments


are these adj rockers? if so then take the nut down till you have about 1/4 in bolt sticking above it, then see if it will start, if it does then back each rocker off till it starts clicking then tighten till it stops clicking then go another1/4 turn thats your running adjustment!!!

Apr 19, 2009 | 2000 GMC Sonoma Extended Cab

2 Answers

Upper engine knock


PULL VALVE COVER INSPECT ROCKER ARMS AT REAR OF MOTOR FOR LOOSE OR BROKE SPRINGS OR ROCKER

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2 Answers

Valve noise


I am from the old school. Start the engine with the valve covers off, back off the rocker nut until the rocker starts tapping then slowly tighten nut until tapping stops then go an 1/8 of a turn tighter. Repeat the same for the rest.I know it will be very messy and you have to watch the oil on the exhaust manifolds for a fire. There will be a lot of smoke. What I do is cut out sheet metal and use it as a shield so the oil does not flow over the head as much.

Dec 27, 2008 | 1994 Chevrolet C1500

2 Answers

Tapping sound on top of motor


hi there the problem your experiencing is either a rocker arm came loose or a valve spring broke. which is causing the valve not to open thus giving you hesitation just pull the valve cover off and cranck up the engine and youll see the problem right away now if it is a loose rocker arm you can just tighten it up but if it is a broke valve spring (which i think it is ) it probably best to have a mechanic do it simply because when you take the retainer clips out the valve can be dropped into the cylinder and if that happens the head has to come off now if you want to do it yourself just write me back and ill give step by step instructions

Aug 12, 2008 | 2000 Pontiac Grand Prix

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