Question about 1980 Yamaha XS 650 G

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Hi , Can you tell me why a xs650 yamaha has three cylinder head valve covers with three 6mm studs and one with four 8mm studs ? Regards John Hall.

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  • Yamaha Master
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My bet is the 8mm studs also serve some other purpose, and therefore needed to be able to apply more force, evenly....Something below is the issue, and not likely the valve cover.

Posted on Mar 31, 2011

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I have a Ryobi R-151 router with an 8mm collet, I cannot find and router bits with 8mm shanks, is their a 6mm collet, or adaptor available for this model? Regards Pete


There are 8mm to 6mm adapter sleeves available. If you take the collet along to a power tool store they may be able to supply you with a suitable 6mm collet. I can't find what type of collet is in the router, but I'm betting it is a ER-11 type in that size range.

https://www.maritool.com/images/ER11-Collet-1.jpg

Nov 23, 2016 | Ryobi Tools & Hardware - Others

1 Answer

Yamaha xs650


C'mon, you get it, right? You can research us up the subject in the annals of Yamaha. You can do it, take the jump into history, For one, I will applaud you if you can discover what hath Yamaha wrought.

Jun 18, 2014 | 1979 Yamaha XS 650 F

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1994 Holden Barina Swing 1.4L Head-Gasket


Hi Adrian, I'm not very clear on the nature of your problem. I'm guessing that your vehicle is a four cylinder in line engine. To replace the cylinder head gasket is rated as a major job and requires the following work to be carried out. The engine must be completely cold before starting any work. Disconnect the battery, drain the coolant and engine oil. Remove the fuel, coolant and all electrical connections to the carburation and ignition system. Remove the intake and exhaust manifolds followed by the tappet cover. It is also required to remove the fan belts, the crankshaft pulley and the front timing cover, Under the tappet cover is the valve assembly, which needs to be removed. The cylinder head bolts need removing in a strict sequential order, beginning from either end and spiralling in so that the last bolts loosened are those at the centre. Once the head is unbolted it should be measured to make sure that the face is not distorted in any way. Assembly is three times more complicated, requiring the correct torquing settings and the correct sequence of tightening, (beginning at the centre and spiralling outwards). You will also need to set the valve timing and clearances. If you would like to tackle the job after reading this, let me know and maybe I can give you pointers while you're on it. Coincidently we do not have that particular vehicle here so I have not had hands on experience with it. The information I have given refers to all four stroke internal combustion engines. The gasket appears as a very basic replacement, but fitting it is far from basic. Regards John

Oct 13, 2013 | Cars & Trucks

1 Answer

Hi can you tell me the torque setting on a yamaha jog 50cc cylinder head


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Torque Settings Cylinder Head Nuts
Cylinder studs for minarelli 49ccScoot com Scooter Forums
http://www.49ccscoot.com/manuals/1987-1990_Yamaha_Jog_Service_Manual.pdf
OEM parts for Yamaha
YAMAHA JOGR JOGRR CS50 Owner Manual

Sep 19, 2012 | 2007 Yamaha Jog RR

1 Answer

Torque specs for 3.2 1995 heads on my isuzu... I need to fix the car ASAP....


Hi, to install follow the procedure below:


  1. Install new camshaft seals and retaining plates onto the cylinder. Tighten the right camshaft seal retaining plate 6mm bolts to 65 inch lbs. Tighten the left camshaft seal retaining plate 8mm bolts to 191 inch lbs.
  2. Thoroughly clean the cylinder head and engine block sealing surfaces.
  3. Place a new head gasket on the engine block and carefully position the cylinder head on top of the new gasket.

Do not reuse or apply oil to the cylinder head bolts.
  1. Install new cylinder head bolts and torque them in sequence to 47 ft. lbs. (64 Nm) for the M11 bolts and 15 ft. lbs. (21 Nm) for the M8 bolts.
  2. Install the dipstick tube bracket to the cylinder head.
  3. Connect the front exhaust pipes to the exhaust manifolds. Tighten the exhaust bolts to 48 ft. lbs. (67 Nm).
  4. Install the power steering pump bracket. Torque the mounting bolts to 34 ft. lbs. (46 Nm).
  5. Install the cylinder head covers.
  6. Install the timing belt and the auto tensioner (pusher). Torque the mounting bolt to 14 ft. lbs. (19 Nm).
  7. Install the timing belt cover and oil cooler hoses and bracket.
  8. Install the crankshaft pulley. Torque the center bolt to 123 ft. lbs. (167 Nm).
  9. Install the fan pulley assembly.
  10. Install the power steering pump.
  11. Install the accessory drive belts.
  12. Install the engine coolant manifold and the heater hose.
  13. Install the intake manifold. Torque the nuts and bolts to 17 ft. lbs. (24 Nm) in a crisscross pattern.
  14. Install the fuel injector connectors and the fuel hoses to the fuel rail.
  15. Install the common chamber. Torque the nuts and bolts to 17 ft. lbs. (24 Nm).
  16. Install the EGR valve assembly. Torque the mounting bolts on the valve side to 69 inch lbs. (8 Nm) and the bolts on the exhaust side to 21 ft. lbs. (28 Nm).
  17. Connect the evaporative emission canister purge hose.
  18. Connect the fuel pressure control valve vacuum hose.
  19. Connect the positive crankcase ventilation hose.
  20. Install the throttle body assembly. Torque the mounting bolts to 14 ft. lbs. (19 Nm).
  21. Connect the vacuum hoses to the throttle body.
  22. Install the ignition control module and the spark plug wires.
  23. Connect the MAP sensor; Canister vacuum switching valve (VSV); Exhaust gas recirculation (VSV); Intake air temperature sensor and ground connectors.
  24. Connect the vacuum booster hose.
  25. Connect the air vacuum hose.
  26. Connect the accelerator cable. Adjust the accelerator cable by pulling the cable housing while closing the throttle valve and tightening the adjusting nut and screw cap by hand temporarily. Now loosen the adjusting nut by three turns and then tightening the screw cap. Make sure the throttle valve reaches the screw stop when the throttle is closed.
  27. Install the cooling fan assembly and the upper fan shroud.
  28. Install the air cleaner assembly.
  29. Connect the negative battery cable.
  30. Refill and bleed the cooling system.
  31. Refill and bleed the power steering pump if necessary.
  32. Refill the engine with fresh oil.
  33. Run the engine and check for leaks and proper compression.

Best of luck............

May 30, 2011 | 1995 Isuzu Trooper

1 Answer

Torque specs for 3.2 1995 heads on isuzu rodeo heads


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To install:

  1. Install new camshaft seals and retaining plates onto the cylinder. Tighten the right camshaft seal retaining plate 6mm bolts to 65 inch lbs. Tighten the left camshaft seal retaining plate 8mm bolts to 191 inch lbs.
  2. Thoroughly clean the cylinder head and engine block sealing surfaces.
  3. Place a new head gasket on the engine block and carefully position the cylinder head on top of the new gasket.

Do not reuse or apply oil to the cylinder head bolts.
  1. Install new cylinder head bolts and torque them in sequence to 47 ft. lbs. (64 Nm) for the M11 bolts and 15 ft. lbs. (21 Nm) for the M8 bolts.
  2. Install the dipstick tube bracket to the cylinder head.
  3. Connect the front exhaust pipes to the exhaust manifolds. Tighten the exhaust bolts to 48 ft. lbs. (67 Nm).
  4. Install the power steering pump bracket. Torque the mounting bolts to 34 ft. lbs. (46 Nm).
  5. Install the cylinder head covers.
  6. Install the timing belt and the auto tensioner (pusher). Torque the mounting bolt to 14 ft. lbs. (19 Nm).
  7. Install the timing belt cover and oil cooler hoses and bracket.
  8. Install the crankshaft pulley. Torque the center bolt to 123 ft. lbs. (167 Nm).
  9. Install the fan pulley assembly.
  10. Install the power steering pump.
  11. Install the accessory drive belts.
  12. Install the engine coolant manifold and the heater hose.
  13. Install the intake manifold. Torque the nuts and bolts to 17 ft. lbs. (24 Nm) in a crisscross pattern.
  14. Install the fuel injector connectors and the fuel hoses to the fuel rail.
  15. Install the common chamber. Torque the nuts and bolts to 17 ft. lbs. (24 Nm).
  16. Install the EGR valve assembly. Torque the mounting bolts on the valve side to 69 inch lbs. (8 Nm) and the bolts on the exhaust side to 21 ft. lbs. (28 Nm).
  17. Connect the evaporative emission canister purge hose.
  18. Connect the fuel pressure control valve vacuum hose.
  19. Connect the positive crankcase ventilation hose.
  20. Install the throttle body assembly. Torque the mounting bolts to 14 ft. lbs. (19 Nm).
  21. Connect the vacuum hoses to the throttle body.
  22. Install the ignition control module and the spark plug wires.
  23. Connect the MAP sensor; Canister vacuum switching valve (VSV); Exhaust gas recirculation (VSV); Intake air temperature sensor and ground connectors.
  24. Connect the vacuum booster hose.
  25. Connect the air vacuum hose.
  26. Connect the accelerator cable. Adjust the accelerator cable by pulling the cable housing while closing the throttle valve and tightening the adjusting nut and screw cap by hand temporarily. Now loosen the adjusting nut by three turns and then tightening the screw cap. Make sure the throttle valve reaches the screw stop when the throttle is closed.
  27. Install the cooling fan assembly and the upper fan shroud.
  28. Install the air cleaner assembly.
  29. Connect the negative battery cable.
  30. Refill and bleed the cooling system.
  31. Refill and bleed the power steering pump if necessary.
  32. Refill the engine with fresh oil.
  33. Run the engine and check for leaks and proper compression.

May 16, 2011 | 1995 Isuzu Rodeo

3 Answers

1992 toyota corolla oil leak around spark plug tubes. how is it repaired


You need a new valve cover gasket set. This will come with seals that fit around the spark plug tubes.

Jan 18, 2011 | 1992 Toyota Corolla

1 Answer

Removing cylinder head (hidden bolt?) Ive pulled the four main bolts and two nuts and removed chain and sprocket but it still wont separate. What gives


There is a nut in a recess at the front of the cylinder, beneath the second fin. There is also two more bolts front and back of head near cams. Don't forget to take out the front camchain dampener. Once you have got all of them, systematically go around base of head with light upwards taps with a rubber mallet. Gaskets often cause grief when old or sealed with additional products. Do not prise between fins or wedge between head and cylinder. Gentle, systematic taps is all that will be needed. There are dowels and cylinder studs between both parts and the head needs to come off completely straight without causing damage. The alloy head and cylinder is very soft compared to the tensile strength of these dowels and stud bolts. Goodluck and Cheers.

Link below has exploded view of the section needed. (other sections go to "partslist" on header at top)

http://www.cmsnl.com/yamaha-ttr250ppc-2002_model11060/partslist/A-05.html

May 10, 2010 | 2002 Yamaha TT-R 250

1 Answer

How do I replace the valve cover gaskets for a 1996 Ford Ranger w/ 3.0L Engine?


The valve covers installed on the 3.0L engine incorporate integral (built in) gaskets which should last the life of the vehicle. Replacement gaskets are available if required.
  1. Disconnect the negative battery cable. Disconnect the ignition wires from the spark plugs, but leave them attached to their wire looms.
  2. Remove the ignition wire separators from the rocker arm cover attaching bolt studs with the wires attached, then lay the wires out of the way.
  3. If the left hand cover is being removed, remove the throttle body assembly, the PCV valve and fuel injector harness stand-offs. If the right hand cover is being removed, remove the engine harness connectors, fuel injector harness stand-offs and air cleaner closure hose from the oil fill adapter.
  4. Using caution, slide a sharp thin blade knife between the cylinder head gasket surface and the valve cover gasket at the four RTV junctions. CUT ONLY THE RTV SEALER AND AVOID CUTTING THE INTEGRAL GASKET.
  5. Remove the integral gasket from the valve cover gasket channel. Note bolt/stud fasteners locations before removing gasket for correct installation. Clean gasket channel and remove any traces of RTV sealant.

To install:
  1. Align fastener holes, lay new gasket onto channel and install by hand. Install gasket to each fastener, seat fastener against cover and at the same time roll gasket around fastener collar. If installed correctly all fasteners will be secured by gasket and not fall out.
  2. Install valve cover to the engine, lightly oil all bolts and stud threads. Apply a bead of RTV sealant at the cylinder head to intake manifold rail step (two places per rail).
  3. Place the valve cover on the cylinder head and install attaching bolts and studs. Tighten the attaching bolts to specifications.



0996b43f802117db.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 3: Rocker arm cover installation on 3.0L engines
  1. Install all remaining components in reverse order of removal procedure. Connect the ignition wires to the spark plugs and reconnect the negative battery cable. Start the engine and run to normal operating temperature, then check for oil and vacuum leaks.

Jan 19, 2010 | 1996 Ford Ranger SuperCab

1 Answer

What is the head bolt torque on a 1990 suzuki lt250r quadracer changing head gasket had head resurfaced need to know the proper torque thank you just put in rm 250 no category for atv


The 8mm head bolts are torqued at 19 - 21 ft/lbs.
any smaller 6mm bolts are torqued to only 6 ft/lbs
like those on the lower cylinder.

Aug 20, 2009 | 2003 Suzuki RM 250

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