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Do you need to use new head bolts on this engine?

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You should replace head bolts whenever removing and replacing heads. Re-using head bolts you have a 50% chance of failure.

Posted on Mar 20, 2011

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2 Answers

Do you need to apply silcon to new head bolts before you torque them down?


The really important thing to worry about with the head bolts is the correct sequence and torque pressures.

Jun 28, 2015 | Cars & Trucks

1 Answer

My have a blown head gasket on my 2000 Honda Accord V6. What could have led to this problem?


most common causes of blown head gaskets are engine overheating. could be caused radiator cooling fans inoperative, cooling system leaks, clogged radiator passages,or sticking thermostat. if a head gasket is severely blown the cooling system will pressurize very rapidly on cold engine startup. other more rare cases of head gaskets blowing could be loose head bolts. make sure new head bolts are used and torqued correctly if service manuals recommend new head bolts.

Jul 14, 2012 | 2000 Honda Accord

1 Answer

I need troque setting for cylinder head bolts for Madza MX3


zjlimited_1139.jpg

Fig. 1: Cylinder head bolt tightening sequence for all 4-cylinder engines


1. Clean the cylinder head bolts and the threads in the block. Make sure the bolts turn freely in the block.

2. Install a new head gasket on the engine block. Make sure the camshaft sprocket timing marks are still aligned, as set during the removal procedure. Install the cylinder head.

3. Lubricate the bolt threads and seat surfaces with clean engine oil and install them. Torque the bolts in 2-3 steps to 56-60 ft. lbs. (75-81 Nm) in the proper sequence.

Hope helps.

Apr 29, 2011 | 1995 Mazda MX-3

1 Answer

Correct pressure for torque the head of mazda pickup 1998


Since you didn't say which engine you have, I've pulled torque specs for 3 different engines. Also, since I can't include a diagram showing the relative locations of the numbered head-bolt locations, it would be a good idea for you to purchase a vehicle specific repair guide that will show this info.


Take particular note about the TTY (Torque to Yield) bolts used on 2 of the 3 engines shown. It is said that new head bolts MUST BE USED when head is replaced or re-installed to obtain the proper torque.



B2500 4 Cylinder

Torque sequence: --------- ' 10 6 2 4 8 ' front ' ' ' 7 3 1 5 9 ' -----------Step 1: torque in sequence to 51 Ft/Lbs Step 2: torque again in sequence to 51 Ft/Lbs Step 3: final tighten all bolts an additional 90 to 100 degrees recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) that permanently stretch during the initial installation. New head bolts must be used when cylinder head is replaced or re-installed to obtain proper torque.







B3000 3.0 6 Cylinder

Torque sequence ---------- ' 6 4 2 8 ' ' ' ' 5 1 3 7 ' ---------- Step 1: torque to 59 Ft/Lbs Step 2: loosen in sequence (1) full turn Step 3: torque to 41 Ft/Lbs Step 4: torque to 73 Ft/Lbs









B4000 4.0 6 Cylinder

Torque sequence --------- ' 5 1 3 7 ' ' ' ' 6 4 2 8 ' --------- Step 1: torque cylinder head bolts in sequence to 26 Ft/Lbs Step 2: torque cylinder head bolts to 56 Ft/Lbs Step 3: turn cylinder head bolts in sequence an additional 90-degrees recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) that permanently stretch during the initial installation. New head bolts must be used when cylinder head is replaced or re-installed to obtain proper torque.


Good luck with this job!

Feb 06, 2011 | 1998 Mazda Pickup

1 Answer

Want to know the amount of torque pressure do i use when tightening the head bolts, and whats the sequence?


To install:

0996b43f80208f65.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Cylinder head bolt torque sequence-3.8L engine

  1. Install the new cylinder head gasket with the arrow pointing to the front of the engine.
  2. Install the cylinder head.
  3. Install NEW cylinder head bolts. Torque the bolts in sequence, as follows:
    1. Step 1: 37 ft. lbs. (50 Nm).
    2. Step 2: Plus 120 degree turn.
To install:

0996b43f802316ea.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Tighten the cylinder head bolts using the following sequence-31L and 3.4L engines

  1. Install the cylinder head with a new gasket.
  2. Apply thread sealer to the head bolts.
  3. Tighten the cylinder head bolts to 37 ft. lbs. (50 Nm) plus an additional 90 degree turn.

Dec 16, 2010 | 2002 Pontiac Grand Prix

1 Answer

Whats the bolt pattern for my 1995 ford escort head?


1.8 liter..NOTE: Lubricate the cylinder head bolts using the specified engine oil.

Install the cylinder head bolts. Tighten the cylinder head bolts in 2 or 3 steps in the sequence shown to 76-81 Nm (56-60 lb-ft).

b064be7.gif
1.9 liter
Apply a light coating of engine oil to the threads of the new cylinder head bolts. Install the new cylinder head bolts to the cylinder head. Following the sequence shown below, tighten the cylinder head bolts to 40-60 Nm (30-44 lb-ft). Loosen all cylinder head bolts approximately two turns, then retighten the cylinder head bolts to 60 Nm (44 lb-ft) following the sequence shown. After tightening, turn all bolts 90 degrees, in the same sequence. Complete bolt tightening by turning them an additional 90 degrees, in the same sequence. 398246b.gif

Aug 21, 2010 | 1995 Ford Escort

4 Answers

Need the head bolt torque specs for a 1999 grand am - i am trying to replace the heads on 1999 grand am with 3.4 engine


Fig. Cylinder head bolt tightening sequence-3.1L engines & 2001-04 3.4L engines

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Fig. Cylinder head bolt tightening sequence-2005 3.4L engines

5579e52.jpg

Hope this help (remember rated and comment this).

Mar 30, 2010 | 1999 Pontiac Grand Am GT

1 Answer

Need to know cylinder head bolt torque specs


Head Bolt Torque For your 1994 Oldsmobile Cutlass Supreme (3.4L SFI DOHC): clearpixel.gif Foot pounds (Final torque) clearpixel.gif Note: Torque sequence --------- | 6 2 3 7 | | 5 1 4 8 | --------- Step 1: torque in sequence to 33 Ft/Lbs Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque. clearpixel.gif clearpixel.gif clearpixel.gif Foot pounds (Final torque) clearpixel.gif Note: Torque sequence --------- | 8 4 1 5 | | 7 3 2 6 | front --------- of engine | 6 2 3 7 | | 5 1 4 8 | Step 1: torque to 40 Ft/Lbs --------- Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque.

Feb 07, 2009 | 1994 Oldsmobile Cutlass Supreme

1 Answer

We are fitting a reconditioned cyl. head to Toyota 2C T diesel turbo engine .On the new head gasket kit they say we should replace head bolts . The old ones are in perfect condition and came out easily...


Many of today's engines require new head bolts because when they are tightened down they are stretched, and will no longer tighten to true torque. They should have shipped new head bolts with the new head.. Sorry about the bad news.

Aug 12, 2008 | Toyota Passenger Cars & Trucks

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