Question about GMC C1500

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Replaceing my head gaskets on a orginal 305 in my 83 seirra. got the heads sitting back on with the new gaskets. bolts are hand tight.I have a diagram of the sequence. I need the torque specs for the bolts.

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  • GMC Master
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60-70 Foot pounds

Posted on Oct 12, 2010

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What is the torque settings for polo bah motor big ends :mains and cylinder head


CHECK BELOW..
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Tightening torques
Bolted connections Tightening torque
Bolts, nuts M 6 10 Nm
M 8 20 Nm
M 10 45 Nm
M 12 60 Nm
Deviating from above
Exhaust pipe to manifold 40 Nm
Installation
Note
t Only remove the new cylinder head gasket from its packing immediately before installing.
t Handle the new gasket with extreme care. Damaging will lead to leaks.
- Place a clean cloth in cylinders so that no dirt or emery cloth particles can get in between cylinder wall and piston.
- Also prevent dirt and emery cloth particles from getting into the coolant.
- Carefully clean cylinder head and cylinder block sealing surfaces. Thereby ensuring that no scoring or scratches are formed (when using abrasive paper the grade must not be less than 100).
- Carefully remove metal particles, emery remains and cloths.
- Set No. 1 cylinder piston to TDC and then turn crankshaft back slightly.
- To centralize, screw guide pins from 3450/1 into front outer holes for cylinder head bolts-flechas-.
- Place the new cylinder head gasket in the centralizing pins -A-. Lettering (Part No.) must be readable.
- Fit cylinder head, screw in 8 remaining cylinder head bolts and tighten by hand.
- Remove the guide pins with tool 3450 by the bolt holes. To do this, turn the tool left until the pins are removed.
- Fit remaining cylinder head bolts and tighten hand-tight.
- Tighten cylinder head in tightening sequence as follows:
- Tighten all bolts to 30 Nm.
- Then tighten all bolts a 1//4 turn (90 °) further using a rigid wrench.
- Then tighten all bolts again a 1/4 turn (90 °) further.
Note
There is no requirement to retighten the cylinder head bolts after repairs.
The rest of the assembly is basically a reverse of the dismantling sequence.
Note
When the camshaft is turned, the crankshaft must not be at TDC. Danger of damage to valves or piston crowns.
Installing toothed belt and adjusting valve timing > Chapter.
Filling with new coolant > Chapter.
- Interrogate fault memory > Chapter.

Feb 21, 2015 | 2006 Volkswagen Polo 1.6

Tip

For All You Motor Heads


Want an easy way to take a cylinder head on and off a motor?
Well here you have at least one thought, hope it helps you all.
Remove all other sub assemblies as usual to gain access to the cylinder head and its bolts, Remove the cylinder head bolts.
After you have all the gaskets cleaned and ready for installation, take one of the head bolts to your local parts house or hardware store and match it up with about eight studs of the same diameter thread and length.
thread four of these studs 2 staggered to the front head bolt threaded holes in the engine block and two staggered in the two rear head bolt threaed head bolt holes.
You are now about experiene a whole lot of trouble free mounting of the head gaskets and seals, as well as the installation of the head/heads (on a V/6 or V/8).
Just slide the head down the shaft of the head bolt studs and one at a time install the head boltys using the inside to the ends torque theory and walla... you have it on without the gaskets sliding and without the cylinder head sliding loosing a proper seal.
Don't forget to be certain the stud bolts you threaded are hand tight and high enough to be protruding up through the heads so you can easily unscrew them when you need to replace them with the factory head bolts.

on Jun 11, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

Thermostat diagram


remove the upper hose from the radiator to the engine head, on the head end where the hose clamps to there are two size twelve bolts take those out and theres the thermostat pull out by hand easily if not tap it out, scrap off the old gasket on the head and hose bib, place new thermostat in and new gasket and bolt on. (note) if you don't have a new gasket some high temp silicone will work fine. put hose back on and you should be all good.

Jul 26, 2013 | Toyota Celica Cars & Trucks

1 Answer

Its a 2000 cadillac deville the oil motor goes to the radiator what can I do


Engine oil going to radiator is a cylinder head problem.
Either
1. Cylinder head gasket burnt
2. Cylinder head bolts not tight enough
3. Cylinder head cracked
4 Cylinder head warped.

Remove cyliner head and pressure test it for cracks. If cracked replace unless someone near you can repair effectively. If not then skim and you might as well do a complete cylinder head service ie valves, stem seals etc. Put back head with new gasket and torque correctly and be surprised with the results.

Sep 13, 2012 | Cars & Trucks

2 Answers

Car mixes oil and water in the radiator.it snapped the timing belt and bend valves inlet and were replaced then orignal head gasket fitted bt problem continues.no mixing on dip stick


If it is still snapping the timing belt,then look for the cam hold downs to be torqued to tight,check lifters and followers for non movement,this would also cause the problem,when the timing belt is installed and ready,turn by hand the crankshaft multi revolutions to make sure there is no problems.

Sep 11, 2010 | Hyundai Accent Cars & Trucks

1 Answer

How to replace head gasket 1998 Lumina


Cylinder Head Removal & Installation 3.1L Engine To Remove:
NOTE: With some minor variations, this procedure can be used on both the left and right cylinder heads.
  1. Raise and safely support the vehicle.
  2. Drain the engine coolant and the engine oil. Lower the vehicle.
  3. Remove the upper and lower intake manifolds.
  4. Remove the rocker arms and pushrods.
  5. Remove the exhaust crossover pipe.
  6. Remove the engine mount strut bracket.
  7. If removing the left side (front) head, remove the dipstick tube.
  8. Tag for identification, then remove the spark plug wires.
  9. Remove the spark plugs.
  10. Remove the exhaust manifold using the procedures found in this section.
  11. Remove the eight cylinder head bolts, then remove the cylinder head. There are locator pins that align the head to the block. Pull upwards on the head to disengage the pins, then remove the cylinder head to a suitable work area.
  12. If the head is be overhauled, remove any remaining components such as the engine lift hook, the fuel line bracket bolts, the engine coolant temperature sensor, etc., as required.
Position a new gasket, install the head, then tighten the bolts in the sequence shown (3.1L engine shown) 93173g43.gif

To Install:
NOTE: If the head gasket failed, determine the cause. Gasket failure is caused by the following conditions: improper installation; overheating due to a failure in the electric cooling fan system or a leak in the cooling system; loose or warped cylinder head; missing, off location or not fully seated locator dowel pins; low torque on the cylinder head bolts; warped block surface; scratched or gouged gasket surfaces; excessive intake manifold torque and even cracked engine block tapped holes.
  1. Clean all parts well. Remove all foreign material to the bare metal. Do not use a motorized wire brush on any gasket sealing surface. It is good practice to use the proper size thread-cutting tap to clean the threaded bolt holes in the block. This helps assure an accurate torque reading.
  2. Place a new head gasket on the clean engine block deck surface. Many gaskets will have some sort of marking denoting TOP or THIS SIDE UP. Make sure the gasket sits flat and is not hung up on the locator dowel pins. Use no sealer on the head gasket.
  3. Carefully set the cylinder head in place, using care not to damage the gasket. Make certain that the head engages the locator dowel pins that properly position the head.
  4. The bolts should be very clean since dirt built-up on the bolt threads makes it difficult to get an accurate torque reading. These are 'torque to yield' bolts which stretch a small amount when tightened; new bolts are always recommended. On a used vehicle, especially a high-mileage vehicle, it may be difficult to determine if the heads have been removed before and how many cycles the bolts have been removed and tightened. New bolts should be part of any cylinder head service. Use GM Sealer #1052080, or equivalent, on the threads of the head bolts and install all eight bolts, finger-tight.
  5. With an accurate torque wrench, tighten the bolts gradually, in sequence, working from the center outwards. Final torque should be 33 ft. lbs. (45 Nm), plus an additional 90 degrees (1/4-turn). A torque angle meter is recommended.
  6. Install the remaining components in the reverse order of the removal process.

Aug 11, 2010 | 1998 Chevrolet Lumina

1 Answer

Im replacing the head gasket what is the tourq and sequence for instillation


A torque specification is how tight you must make the bolt by using a torque wrench which measures the tightness you apply to the bolt, ensure you are using new head bolts, a reliable torque wrench, clean the threads of the cylinder head (with tap) where head bolts screw into and when installing bolts ensure they are properly lubricated. And the sequence is the order in which you tighten each bolt.

Jun 19, 2010 | 1996 Acura TL Series

5 Answers

Head Gasket?? Valve cover Gasket???


most likely it is the valve cover gasket. it covers the valve train where there is alot of oil to lube the top of the motor. if the head gasket was leaking it may have more signs of running poorly. also having coolant leaks also. so i will have to say valve cover gasket. now usally you may have a oil burning smell with it depending on the area of the lek but not always.

the valve cover can easily be seen when the hood is open. it is right on the top and where it meets the clyinder head is where the gasket is and the leak can be seen.

if you have more question please ask.

Nov 12, 2009 | 1997 Geo Tracker 2 Door

3 Answers

1992 Toyota Previa van,Oil dripping onto exhaust manifold, replace head gasket? need a free manual!


The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.

May 26, 2009 | 1992 Toyota Previa

1 Answer

2003 saab 9-5 replaced head gasket because of overheat


disconnect computer and drive it ,if it drives ok then nothing wrong with it,after test drive put your hand held plug in gizmo under wheels and drive over it for what use it is.Skimmed head and new head bolts ?you must have more money than sense didnt you check it with a straight edge first??then clean it with a flat bed sander.head bolts ?? more expense .only expense should have been head gasket and antifreeze with a tube of instant gasket.Have you put all the little vac pipes back on that open the flaps on the air con and left the one off on the valve between the inlet and exhaust manifolds.Also did you remove and grind in the valves ??

Dec 19, 2008 | 2003 Saab 9-3

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