Question about 1986 Ford F 250

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Dist. and cam and rocker arms don't move 300 six cylinder while trying to start eng.

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Broken Timing Chain. If you do this repair yourself it is not too expensive. If you have never done one you may need to get some loaner tools at Autozone or Oreillys. Or you can call for estimates and see if the shop will throw in a free tow or use an Autoclub or Insurance Tow benefit.

The Timing chain cover is the housing in front of the block. You will need to pull the crankshaft pulley off to get the housing apart. There is a large bolt holding the pulley on and sometimes you need a pulley puller to remove the pulley. The Water pump and several brackets will have to be moved out of the way. If the Distributor goes through the front cover, the Distributor will need to be pulled. When you align the timing marks on the 2 gears, you will need to reinstall the Distributor with the rotor pointing to Number 1 cylinder.

When you need to remove the crankshaft seal, do it after you clean off the gasket. You want to look at the ridges on the seal. Yours may be possible to install backwards, yours may or may not be that type.

Put a little lubricant on the seal, remember to align the timing marks and put some lube on the chain. Sometimes it helps to use different colors of paint to keep the waterpump and timing cover bolts in their proper position. Some bolts are different lengths and the motorblock and housing have matching thickness. You can use cardboard and make a rough outline of the bolt pattern and insert the bolts into the cardboard while you are disassembling the motor.

Posted on Aug 28, 2010

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Need to get cams on compression stroke


I there are many ways to see if you are on a compression stroke but the best and most definitive way is to remove the rocker cover and watch the vavles as they move up and down while rotating the engine by hand by hand by hand with the ignition turned off.
When you are on the compression stroke both the valves for that cylinder will be in their highest position and there should be some slack between the valve and the rocker arm.
When timing and engines this is usually done on number one cylinder top dead centre compression stroke.
Regards

Feb 20, 2012 | Cars & Trucks

1 Answer

P 2647"A" Rocker Arm Actuator


Your going to need a air pressure regulator or better yet if the ECM found fault price it and replace it
  1. Start the engine, and let it run for 5 minutes, then turn the ignition switch to LOCK (0).
  2. Remove the cylinder head cover.
  3. Set the No. 1 piston at top dead center (TDC).
  4. Move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A should move independently of the secondary rocker arm B.
    1. If the intake secondary rocker arm A moves freely, go to step 5.
    2. If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, then check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
    3. Repeat step 4 on the remaining intake secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 6.
    4. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.0 kgf/cm2, 57 psi).
    5. Inspect the valve clearance.
    6. Install a 10 x 1.0 mm adapter to the inspection hole, then connect the air pressure regulator
  5. With the specified air pressure applied, move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A and secondary rocker arm B should move together. If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, and check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
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Aug 23, 2011 | Honda Accord Cars & Trucks

1 Answer

2001 Sunfire 2.2L, Car started Noise seems to coming from top of Eng . Lifters is my guess, is there anything that would make similar noise, or that I should be checking, How can I be sure it is lifters?


You make have a bad or sticking lifter, remove the valve cover and have someone tap the key, make sure to disconnect the ignition coil to avoid the engine from starting, as they tap the key you will look for the valve to close, a good way is to watch the one next to it open, when the valve is open then you will know the other is closed as there are two valves per cylinder. with the valve closed grab rocker arm and see if theres a lot of play in the direction it moves if it does then look at rocker and push rod and if those are good then you have a bad lifter. if this engine use an overhead cam then there will be no rocker arms or push rods you will need to look for any worn lobes on cam, a stethiscope would be a good tool. start engine with cover off and listen to each cylinder and pin point noise, this will get a little messy as oil will be splashing out a little but its the best way to locate the noise. poor oil flow would cause this also or a loose timing chain. i would start at the top first and look inside cover. good day.

Jun 15, 2011 | 2001 Pontiac Sunfire

2 Answers

What is the recomended torque setting for rocker arm nuts on a 289 ford mustang 1966


If all parts on this motor are stock and it is not a high performance engine but a stock windsor unit, there is no actual torque standard for the rocker arm nuts since the lifters are hydraulic. The manual procedure recommends the following:
with the motor off, tighten all rocker nuts until there is no slack between the rocker arm and the tip of the valve stem. Make sure each rocker is on the heel of the cam, this proceedure can be done one cylinder at a time or you can follow the ford V-8 cylinder identification for valve clearence sequence. I like the one cylinder at a time, it's a little slower but I think it's more accurate. after all rockers are set to the above mentioned clearance, start the motor and let the oil pressure build up in the lifters. At this point you should have installed the oil deflector clips on the rockers, just above the oil squirt holes, otherwise, things get a little messy. when the oil pressure is up, tighten down on each rocker until the engine starts to miss. At this point back off enough to clear the engine idle up and move on to the next rocker. Hope this helps.

Feb 10, 2011 | Ford Mustang Cars & Trucks

2 Answers

I line up timing marks on engine and the dis is at 2 #


okay, did you have these items out of motor or did it quit running and this is what you have checked? I can fix this problem but i dont know where to start with this information. I can say that the crank has to be at zero,the #1 piston needs to be at TDC( up in cylinder) the cam sprocket has a mark that should align up with crank, the dist rotor should aim to #1 cylinder and the dist cap position wire should go to the #1 spark plug, If this was all in tack and now the truck wont start and this is your diagnosis then i would check the timing chain and gear for worn or nylon broken timing gear . If you put this together and you noticed this then you can either remove dist and align oil pump shaft and re-install or move the plug wires one post starting with the rotor aim as the #1 wire and proceed in a clockwise rotation 1-8-4-3-6-5-7-2 . As long as the dist can move for timing purposes it doesnt mater where the #1 wire starts as long as the #1 wire starts where the rotor aims and the motor is in time. If everything was in tack then the chain has jumped and needs replaced.

Jan 21, 2011 | 1996 Chevrolet Tahoe

1 Answer

I just need the procedure and the torque specifications for installing rocker arms and push tubs on my 91 jeep cherokee 4.0


Place each push rod in the hole in the cylinder head made for it, make sure that the rod is straight and seated in the lifter, not next to it. Rocker arms are mounted on "bridges". Place a bridge assembly where it belongs and set the rockers on top of each corresponding push rod. Tighten each bolt, alternating between each so you don't pull it over to one side. Torque spec. is very low, being only 19 foot lbs. (I generally go a bit tighter, but don't go crazy with that. 25 is probably the snapping point)
You will find that certain cam lobes will be in the "up" position. You can still tighten down the bridge as long as you are careful, or you can rotate the engine by hand so the cam turns off that spot.
After you are finished, rotate the engine twice by hand and watch each rocker arm to make sure it is moving up and down as intended. If you feel any binding, stop and find out why.
Torque on the rockers is not super critical so if you don't have a wrench that goes that low, just tighten them carefully and don't pull on the wrench like you are trying to pull the crankshaft up through the head and you will be fine.

Sep 26, 2010 | Jeep Cherokee Cars & Trucks

2 Answers

2002 Jeep Liberty Sport 3.7L V6 Replaced all six spark plugs with brand new ones and replaced coils for 4 and 6 with new ones Still reading misfire Within 10 minutes of starting enging, vehicle idles...


We have an 02 Liberty 3.7L, here at my repair shop, after customer replaced, spark plug's and all coil pack's, brought it here to my shop, was running with two cylinder's miss, did cylinder compression test, no compression on two cylinder's, remove valve cover's, found two rocker arm's off, remove cylinder head's, and found that on those two cylinder's the valve seat's had drop, keeping the valve open, and that's why the two rocker arm's had come off, do a cylinder compression test, could be the same thing, hope this was very helpful.

Aug 30, 2010 | Jeep Liberty Cars & Trucks

1 Answer

2005 dodge dakota has a rattle for 5 seconds at


Sounds like a rocker arm is out of adjustment or one of the rocker arms are worn more than the rest. If you find one loose rocker arm and the rest are tight then the entire rocker assembly will need to be removed and the one rocker arm will have to be replaced. Thats on a V6 and V8 models . Now on the four cylinder you have to remove the timing belt cover,unbolt the timing belt and hold tension on it to keep the belt from jumping off the crankshaft gear. Remove the rocker arm cover and you will have to remove the cam to get to the roller rocker arms. There is alot of work to do to get this job done. If you do not have all the tools to do this with, then it would be better to take the truck to a mechanics shop for repairs. Hope this will help you.

May 27, 2010 | 2005 Dodge Dakota

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. 
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May 20, 2010 | 2002 Jeep Liberty

1 Answer

Loud rattle noise in Camshaft


First, your engine has rocker arms, if you have a 4 cylinder you have 8 rocker arms, and if it is a 6 cylinder you have 12 rocker arms. Now if it is indeed a rocker arm making the noise, the cause is most likely a bad lifter or a worn cam shaft.

Apr 02, 2010 | 2001 Chevrolet Cavalier

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