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Torc specifications and tightening seq. on the head gasket for a 5.5hp Johnson 1961

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Torque would be about 50 - 60 lbs. Finger tighten all bolts and snugg then by alternating side to side in a clockwise direction.

Posted on Oct 05, 2009


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Have 1996 C1500 vortex 4.3 blowed head gaskets ,replaced head gasket but #4 cylinder is misfiring & only has 30psi & 60psi #3 possible burt valve,burnt piston,compression ring damaged or?

the first thing is --did you do anything with the head ( machined flat-checked for cracks)
did you run a thread tap down the stud holes and blow out any oil,water in the holes
did you inspect the valve heads to see for burnt heads
Why did you replace the head gasket to start with
Low pressure between adjacent pistons indicates blown gasket between those cylinders
to do a head job properly, remove the head and check for warps and cracks ( head machined flat) clean out the threads of the studs and blow any thing out of the holes
next check that all the head studs are the same length and insert each stud in the head so that all the studs sit the same distance above the head before tightening down
next tighten down using the correct tightening sequence so that the gasket is evenly compressed
tighten down to the correct tension or degrees of turn as is stated in the specifications
any piston or valve or ring damage would be restricted to the one piston and would not show up in adjacent cylinder

Jan 01, 2016 | Cars & Trucks

1 Answer

Need to know torque of bolts on head gasket

Torque settings are very specific to Make Model and Year. They also have to be tightened in a specific sequence and usually to two or three specific torques to fully tighten.

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Head bolt setting Holden viva 06 f18

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What is the head bolt torque spec

Engines are designed with removable cylinder heads, so valve train and cylinder malfunctions can be separated, giving the owner a chance at making repairs instead of replacing the entire engine. When people get themselves involved in pulling a cylinder head off of an engine you know the automobile they're working on is experiencing serious problems.

Unfortunately one of the most sensitive operations is the reassembly process. In particular the head bolt tightening pattern and torque specifications. These must be adhered to or repeat repairs will likely be needed. This article reviews common head bolt tightening patterns, procedures and tips to increase the chances of success.
Cylinder Head Operation A cylinder head sits on top of the engine block forming a combustion chamber where the air fuel mixture is compressed and then burned. This component also contains intake and exhaust ports allowing the cylinder to take in fresh air and fuel then expel the burnt exhaust gases. The most extreme heat and pressure in an engine exists in this area and is sealed by a head gasket.

Compression of the gasket is distributed evenly by the strategic placement of the head bolts. How tight each bolt should be is known as a torque specification and measured with a torque wrench to assure accuracy. The order in which the bolts are tightened to that specification is known as a tightening pattern. Performing these two procedures correctly is vital to the longevity of the repairs.
Head Bolt Torque Principles Before we get into head bolt tightening patterns and procedures let's talk about the uniqueness of the bolt itself. These heavy-duty fasteners use elasticity principles in their design. The bolt is designed to be stretched to a certain point. It's this spring like property that provides the clamping force and holding power when the fastener is threaded into tapped holes on the cylinder block side. The more the bolt is stretched the tighter it becomes.

An important note about specialized head bolts is some are designed to only be stretched one time. When this is the case a service manual will indicate new bolts are required for reassembly. These instructions are also supplied to the factory auto parts department that sells the gaskets. The second thing to be mindful of is that a bolt can be stretched too far when it's taken past its tightening specification. These fasteners can take on a bottle neck shape where the threaded portion looks thicker than the rest of the bolt. These damaged retainers must be replaced.

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How many torcs for a 92 nissan stanza head gasket

Most NAPA auto parts stores can tell you this

Aug 02, 2012 | Nissan Stanza Cars & Trucks

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Changing the head gaskets.i want pictures of the heads. dont know what all i have to remove.

I would recommend getting a repair manual if your going to do it yourself. Head bolts need to be tighten a specific way and in a specific order.

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Torc specifications for 2000 chevy blazerfor the intake manifold gasket

Do it in three passes 1st pass 27 inch pounds 2nd pass 106 inch pounds 3rd and final pass (carefull it changes up on ya a bit) 11 foot pounds.

Jul 17, 2009 | 2000 Chevrolet Blazer

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2005 Dodge 1500 code p0404 EGR valve.

The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,

  1. Remove electrical connector (5) at top of EGR valve solenoid.
  2. Remove tube mounting bolt (1) at intake manifold.
  1. Remove two bolts (4) connecting EGR tube (1) to valve assembly.
  2. Remove gasket located between EGR tube flange and EGR valve assembly.
  3. Remove two EGR valve mounting bolts (5).
  4. Separate valve assembly (3) from engine.
  5. Remove and discard metal gasket located between cylinder head and valve assembly.
  1. Clean area at rear of left cylinder head where it joins base of EGR valve.
  2. Clean EGR tube where it joins EGR valve.
  3. Position new gasket between EGR valve and cylinder head.
  4. Position EGR valve to cylinder head. Install and tighten two bolts (5). Refer to Torque Specifications.
  5. Position new gasket between EGR tube flange and EGR valve assembly.
  6. Position EGR tube (1) to side of EGR valve and into intake manifold.
    1. Install EGR tube flange bolt (1) at intake manifold. Tighten bolt. Refer to Torque Specifications.
    2. Connect electrical connector (5) to top of EGR valve solenoid (2).Do a final tightening of two EGR tube bolts (4). Refer to Torque Specifications

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