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How do i know if i bent my valve stems buy rotateing my engine to do ther next push rod before it bled down

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Remove rocker cover and watch the valves come to the top after each rotation and you will see one or more not come up as high as the others ! compression gauge will tell you which cylinder , a pressure drop tester will tell you how meany valves leak ( with carbs and exhaust removed so you can see and hear which valves ) first test no oil on top of pistons then secound test with oil covering piston top and if any pressures go up then rings are also leaking ! most garages can do this for you !

Posted on Apr 19, 2014


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Posted on Jan 02, 2017

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SOURCE: I have a 1980 Suzuki

clutch pushrod should just pull out as it should be a 2 piece clutch pushrod model, earlier models were 1 piece and you had to remove clutch cover and pressure plate to remove. hopefully the seal is ok.

Posted on Sep 02, 2010

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Is there anyway that i can fix bent push rods ?

There is no way to repair push rods. If they are bent they need to be replaced. However, the hundred-dollar question is "Why were they bent?" The only thing that will normally bend a push rod is if the pistons hit the valves and compressed and bent the rods. If the push rods are bent, you should go the extra distance to inspect the valves/pistons for damage as well.

Oct 07, 2015 | 2001 Pontiac Grand Am GT

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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

Install push rods

Hi Anonymous, assuming yor stock push rods are still in the engine, remove the clip at the top of the outer push rod tube with a screw driver. Lift up the spring cup and squirt some silicone spray or WD-40 on the o-ring, then take needle nose pliers and slide down the inner push rod tube, do this to all of them. Next you can either remove primary cover to access crankshaft extention bolt or jack up rear end to clear wheel, remove spark plugs, and put tranny in high gear to facilitate turning over engine. Rotate engine so that the RE (rear exhaust) push rod is all the way up the remaing three should spin freely. Lift up the bottom of outer pushrod tube, of one that spins, as high as it will go and secure it with a clothes pin. With some bolt cutters break and remove stock push rod. Repeat process for the other 2 that spin freely, then rotate the engine so RE pushrod is at it's lowest point and spins freely then remove it. I don't know what brand your adjustables are so lay them out on your bench, they should be all the same length with the adjusters all the way in. If you have two that are longer these would be exhaust push rods and the two shorter ones will be intake pushrods. Refering to manufacturers instructions you should be able to install new push rods as one piece with adjusters all the way in, or you may have to disassemle and install piece by piece, it happens sometimes. Refer to instructions for complete turns, it's either 3 or 4 usually 4. Since the RE lifter is all the way down as far as it will go on the base circle of the cam start with that one first. WARNING!!!!! before you install any push rod make sure there is an o-ring in the head and one in tappet block. Slide push rod into tube and install, back out the adjuster until it just starts to touch the lifter then with wrenches back out an additional 3 or 4 turns, if you are not sure about the number call the manufacturer. Lock the jam nut and wait a few minutes until the lifter bleeds down and you can spin the push rod freely. WARNING!!!! never attempt to rotate engine unless the push rod you are installing spins freely. OK now lets move onto the next push rod the RI (rear intake) rotate engine so lifter is at it's lowest point on the base circle and install and adjust the push rod, wait for it to spin freely and then do the other 2 in the same manner. When you are finished some push rods will spin freely while others won't depending on cam position this is normal. Now rotae engine slowly 2 or 3 complete revolutions to make sure you have no valve to valve problems or valve to piston problems. If you do re-doo the adjustment on the offending cylinder. When you are comfortable every thing is ok extend inner push rod tube and install clips, replace spark plugs take bike out of gear and repace primary or lower the bike. With fingers crossed and a silent prayer to the Harley Gods fire it up, there may some slight lifter tick in the first minute or two but will eventually stop when you take it for a test ride. When you get back check it for leaks. Thus ends my modified version of War and Peace. Good luck

Apr 19, 2014 | 2009 Harley Davidson FLHX Street Glide

1 Answer

Vanguard backfires through carb

If you say the valve stems were bent..first did you find out what bent them they just bend...and is the valve face seat damaged..if they were not...your engine is out of time or you did not set the valve stem lash when replacing them this allows the intake valves to be open slightly under the firing stroke firing back through the carb and should have around four thousands of an inch clearance when the springs are completely relaxed and and you should be able to wiggle the valve rocker tappits ...check that if they are correct your engine is out of time..good luck

Oct 10, 2012 | Briggs & Stratton Briggs Stratton Vanguard...

1 Answer

What causes my engine to knock and smoke from the valvecovers

ok there is more going on here lifters out of adjustment more so if reving engine you bent a push rod or valve stem .

Sep 29, 2012 | 1998 Dodge Ram 1500 4WD

1 Answer

Does a 23 horse kawasaki lawn engine have a timing chain? what would cause a bent push rod

a lot of the over head valve engines run into this carbon build up on the valve stem will bend a push rod

Jul 08, 2012 | kawasaki Fh680vgs24 23hp 23 Hp Lawn Mower...

1 Answer

Engine not failed oil pressure good engine ticking think it is rod bearings how do you replace on 1997 chev Blazer

hold up rod bearings were did you get that?lets take it from the top.camshaft lobs move lifters on rotation,which lifters move push rods,push rods push valves up and down,which other side of valves push up and down valve stems,which open and close exhaust and intake stems.ok now were clear on that to see your push rods.take off your valve covers on side with tick.1.check for valve loosness.need a feeler gauge for this and specs for you truck to do this.because ticking is mostly associated with valve loosness or to tight.2.if rod is bad loosin valves but not off and inspect the rods for bends.on a flat surface.replace if bend.also make sure they to go back in same place.and repeat step 1.finally noise continues need to take in and checked possible internal damage.

Aug 17, 2010 | 1997 Chevrolet Blazer

2 Answers

Rocker arm come out on jeep chrysler 3.7 eng

A rocker arm is the arm that sits on top of the valve stem and connects to the push rods 'the push rods sit on the cam so when engine is running, the push rods go up and down in a timed sequence and with the rocker arms, open and close the inlet and exhaust valves. the rocker arm is located inside the valve(rocker)cover .If the rocker arm gets loose or comes out.
Check the nuts on the shaft which holds the rocker arms.either the shaft or nuts are got loose.They need to be tightened.Don't make it too tight or too loose.  Too tight,and they don't flutter right. Too loose,and they allow the rocker arms to wiggle out of whack. Other possibility can be  something is broken, bent, collapsed, or out of adjustment. 
Thanks. you can rate this solution and show your appreciation.

May 20, 2010 | 2002 Jeep Liberty

2 Answers

Recurring bent push rods/knocking engine- ideas?

I have seen this myself on a 3.4L (2.8, 3.1, 3.4, 3.5 & 3.9 are all mechanically the same engines). The valves may have a varnish build-up on their stems causing them to stick in the guides.

Apr 26, 2009 | 2000 Pontiac Grand Prix

1 Answer

Roker Arms

First off, do not overtighten the rocker. You will not make it any tighter and you run the risk of damaging that stud or the rocker. Compare the valve stem height to the other valve stems of the same valve type (exhaust or intake). If it's lower, you may have a broken spring or a stuck valve. Check the push rod against the other push rods, again from the same valve type. If it's lower, and your push rod is OK as you say, you may have a damaged lifter.

Aug 17, 2008 | 1993 Oldsmobile Cutlass Ciera

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