An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Cars & Trucks Master
Re: To adjust valves on this tractor: having a firing...
Make your adjustments to each valve as it comes to rest fully closed. do all the exhaust valves in this manner and then do all the intake valves in this manner. you will rotate crankshaft 90 degrees 4 times to get all the exhaust valves and 4times to get all the intake valves.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need. goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
there is no specification for what you want
the valve clearance is between the end of the rocker arm and the end if the valve stem
the stem end is proud of the spring retainer so if your rocker arm is touching the spring retainer , you have a big problem as for the procedure it is set out in the workshop manual but if you don't have a manual it can be done like this
you will need the firing order of the engine first
now adjust no 1 piston valves when the next piston to fire has the valves in the rock position
that is the exhaust valve just closing as the inlet is just opening a bit of movement of the crank makes either valve move up or down
adjust no 1 piston valves
now move on to the next piston to fire and adjust the valves that were rocking
follow that procedure until all the valves are adjusted
on a 4 cylinder engine with a firing order of 1--3--4--2
bring up no 1 piston and adjust the valves when the valves on no 3 piston are rocking
next piston to fire is no 4 so adjust no 2 piston valves
next piston to fire is no 2 so adjust the valves when no 1 valves are rocking
the procedure is the same for engines with any number of cylinders
The most likely cause would be that the lifters have pumped up while the engine was torn down. This is keeps the valves stuck open, thereby preventing normal compression. You will need to collapse the lifters by applying pressure on them. Normally the pressure applied by the valve springs will do it all by themselves, but at times this must be aided by applying pressure to the pushrod side of the rocker arm with a wooden hammer handle. One other cause could be if the heads were milled while off and they removed too much material. This would mean that the normal stroke of the hydraulic lifter can no longer compensate for the change. In this instance there are shorter length pushrods available, but you would need to source these through a machine shop, as they are not part of a standard engine parts catalog.
Very carefully my friend. Kidding. Ok, remove the valve cover and anything in your way of removing it. By hand, with a socket and ratchet, on the crankshaft bolt head, turn the engine over to get #1 piston to top dead center on compression stroke. You'll need to find out what the valve lash should be in order to adjust properly, I run the 22R engines and only have specs for that, and have a feeler gage to place between the valve head and rocker arm. Check the gap on the intake valve for it is in position to adjust now because the cam lobe is at the farthest away from the valve. If it needs adjusted closer, turn the nut loose and screw the center in to tighten and out to give more gap, then tighten the jam nut after adjusted. Now turn the crank to bring #3 to top dead center and adjust that intake. Once done go back to #1 exhaust and adjust it. You'll know when the #3 is TDC when the rocker is loose on intake valve along with #1 exhaust. Now bring #4 piston up to TDC and adjust intake valve. Like I said, you'll know when it's @TDC when that rocker is loose, but with the spark plugs out you can stick a screwdriver in the plug hole to be sure it's up. Firing order on 4 cylinders is 1-3-4-2 so do your adjustment in that order for each intake valve and go back to the last one adjusted and do the exhaust valve.
360 with hydraulic lifters, the crankshaft wit a ratchet and socket to get each valve closed. When lifter is at bottom turn the valve adjuster out to where you have free movement then turn adjuster till the rocker arm touches the lifter, then turn the adjuster in three quarters of a turn, and that valve is adjusted. No other clearance is required on hydraulic lifters. Do this with each valve in turn as each piston comes to top dead center using the firing order as a guide. When #1 piston is up to top dead center, both valves are closed. Adjust intake and exhaust at this time. Then the next in the firing order. The firing order can be found on the intake as is each cylinder marked with it's number. If it were a Chevy small block, for example only, firing order is 1-8-4-3-6-5-7-2. I would bring # 1 cylinder up to top dead center on compression stroke by removing that spark plug and stick my finger in the hole and crank the engine till I felt my finger being pushed away with compression, then bring that piston up till the timing mark was on the "0" of the timing tab at drivers side of the harmonic balancer on the crank. Adjust both valves on #1 cylinder and then turn the crank until both valves of #8 cylinder were free moving at the rocker. Then to the next in order of fire. I would turn each adjuster out at least one full turn before starting this procedure, then adjust them in order of firing starting with #1. It isn't hard, just takes time to do it right.
Back off on all the rocker arms and check to make sure you didn't bend any push rods then make sure you are starting on #1 Cylinder and readjust, when it starts you can finish the adjustment by backing off rocker arm nut till you here it TICK than tightentill TICK IS GONE. I do not have info on the fireing order for primary adjustment but you should be able to find on line complete instructions, Go to ASK.COM and ask for Chev 350 Valve Adjustment their are several to choose from and even YOUTUBE Videos on it.
Its not realy a torque its a clerance in ths of an inch the intake are 14 ths to 16 ths real tight and the exhust valves are 15 ths loose to 17 ths real tight I have a 2.9 so your will be close likely the same but it needs to be done in sequence the cam shaht has to be just atarting to push up on the valve stem to make this adjustment its usely the firing order that needs to be followed its called valve lash adjustment and you should check for the 3.O JUST TO MAKE SURE ITS THE SAME AS THE 2.9
To be perfectly sure where the number 1 cylinder fire is at this point remove the valve cover, remove the #1 spark plug, remove the distributor cap, clean the crank to identify clearly the crankshaft marking on the crankshaft harmonic balancer wheel.
First step: Slowly turn the crank by hand until the line on the crank lines up to the zero timing mark...if you are on #1 the rotor in the distributor should be facing the #1 segmant in the distrbutor caps firing sequence, to verify further both intake and exhaust valve rocker arms should be in the valve closed positions in the #1 cylinder, the piston should be all the way to the top opf dead center(carefully insert a long skinny screw driver into the #1 spark plug hole to feel the pistons top travel while being sure the valves are both closed as explained above).
With all that checking out you are now exactly on top dead center in the #1 firing order sequence of your valve timing.
well first you need to know the firing order...if it's a small block chevy the firing order is 18436572. You need to write the second four digits underneath the first four digits.
so it looks like this 1843
This will let you know which rocker to adjust...turn the engine over by hand using a rachet on the crank shaft bolt by the harmonic balancer until you get both rockers for number 6 cylinder moving at the same time. Now you may adjust the clearance for both rocker for number 1 cylinder. Then crank the engine over by hand again until number 5 cylinder rockers start to move. Now you can adjust the clearance on number 8 cylinder. You will need to know the manufacturer specs for the valve clearance...continue until all rockers have been adjusted.
Note: The engine should be warm when you make the adjustment.