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31M977-0111-E1 - NEED: TORQUE SETTING FOR HEAD BOLTS - TIGHTENING PATTERN - VALVE SETTING CLEARANCE - IS IT POSSIBLE TO DOWNLOAD A SERVICE MANUAL FOR THIS ENGINE?

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Posted on Jan 02, 2017

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SOURCE: NEED TORQUE SETTINGS FOR 18 HP MODEL

hi

con rod bolt torques are 150 in/lb or 12.4 ft/ lb

cyl head bolt torque is 220 in/lb or 18.5 ft/lb

here is website for parts and manual

http://www.briggsandstratton.com/maint_repair/manual_and_more/docsearch.aspx?enginelookfor=31h777-0297-e1


i would torque them in this sequence

start from bolt centre top , then bolt centre bottom, then bolt left upper , then bolt btm right, then bolt bottom left , then bolt upper right , then bolt centre left

should be 7 bolts 5/16 x unc

check out website its good so is www.partstree.com

cheers paul


Posted on Aug 17, 2010

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I need the torque spec for the valve cover on a 06mercury malin


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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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Torque setting for 1972 Cororna


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Torque specs. for a briggs @ stratton 24hp. head bolts


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Torque settingsfor head on lister petter mini6 engine


I have just rebuilt one for our Westerly 21. This is from my Petter 'A' range workshop manual:-
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I need the torque for all the head bolts on my 1983 datsun 280zx


Check this information for 1983 Datsun 280ZX 2.8L (click over image for zoom)...

zjlimited_2038.jpg

Fig. 7: Cylinder head bolt removal sequence


zjlimited_2039.jpg

Fig. 13: Head bolt torquing sequence-1970-83 models

After repair job, temporarily install and tighten the two center (right and left) cylinder head bolts to 14 ft. lbs. (18 Nm).

Install the camshaft sprocket together with the timing chain onto the camshaft. Make sure that the marks made earlier, line up. If the chain will not stretch over the sprocket, the problem lies in the tensioner. Refer to the Timing Chain removal and installation procedure for the timing procedure, if necessary.

Install the cylinder head bolts. Note that two lengths are used. Tighten the bolts in sequence.
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To complete the installation, reverse the removal procedures. Adjust the valves to a preliminary COLD clearance of 0.2mm for the intake and 0.25mm for the exhaust. Operate the engine until it is at normal operating temperature, retighten the head bolts (loosen them slightly and retighten to the final torque figure) and adjust the valves to the HOT clearance specifications.

Hope this helps; remember to rating this answer and leave some testimonial comment about this.

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1 Answer

NEED TORQUE SETTINGS FOR 18 HP MODEL 31H777-0297-E1. ROD BOLTS AND HEAD BOLTS. IS THERE A PATTERN TO TIGHTENING HEAD BOLDS


hi

con rod bolt torques are 150 in/lb or 12.4 ft/ lb

cyl head bolt torque is 220 in/lb or 18.5 ft/lb

here is website for parts and manual

http://www.briggsandstratton.com/maint_repair/manual_and_more/docsearch.aspx?enginelookfor=31h777-0297-e1


i would torque them in this sequence

start from bolt centre top , then bolt centre bottom, then bolt left upper , then bolt btm right, then bolt bottom left , then bolt upper right , then bolt centre left

should be 7 bolts 5/16 x unc

check out website its good so is www.partstree.com

cheers paul


Aug 16, 2010 | Briggs & Stratton Garden

2 Answers

Need the cylinder head torque settings on a toyota corolla 1990 model ae92 wiht a 4a-fc engine


Tighten in several passes to 44 foot pounds.

I just wanted to add. Since this is an aluminum cylinder head, I hope you loosened the head in the loosening torque pattern. The pattern opposite of the torque tightening pattern. If not, you stand the chance of warping the head.

Again, since it's an aluminum head, it needs to be checked for flatness. Most aluminum heads need to be surfaced before re-installing.

Tightening torque pattern is as follows:

1.The Drivers side of the engine is the Left side.
From the Front going towards the back; the bolts are numbered 10, 6, 1, 3, and 7.
From the Front going towards the back on the Passenger side; the bolts are numbered 8, 4, 2, 5, and 9.

The Exhaust and Intake Camshaft Bearing Cap bolts go to 9 foot pounds. Tighten gradually. One bolt to the other with so many foot pounds, work back, and forth up to 9lbs.

Camshaft Timing Pulley bolts go to 43 foot pounds. (In a tightening sequence, and gradually)

Jul 25, 2009 | 1990 Toyota Corolla

1 Answer

Mitsubishi


The following is verbatum from the mitsu engine overhaul manual... Steps 7 and 8 are a bit cryptic, but it seems like after you tighten the bolts to 20nm in the CORRECT PATTERN... you then go around tightening 1/4 turn through the pattern, then a final 1/4 turn through the pattern... do NOT tighten each bolt to 20, the 1/4 then another 1/4 before going to the next bolt, the idea is to get EVEN tightening across the head, so tighten her three times around the pattern! Now for the verbiage from Mitsu's overhaul manual...


(1) When installing the cylinder head bolts, check that the
shank length of each bolt meets the limit. If the limit is
exceeded, replace the bolt. - Limit: Max. 96.4 mm (3.79 in.)
(2) Install the washers.
(3) Apply engine oil to the bolt threads and washers.
(4) According to the tightening sequence, tighten the bolts to
75 Nm (54 ft.lbs.).
(5) Loosen the bolts completely.
(6) Torque the bolts to 20 Nm (14.5 -ft.lbs.)
(7) Tighten the bolts l/4 turns (90”) more.
(8) Tighten the bolts l/4 turns (90”) additionally.

Dec 04, 2008 | 1997 Mitsubishi 3000GT

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