Question about 1990 Honda Prelude

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Torque specs for head bolts, 1990 Honda prelude si

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49lbs I believe but it should tell you in the manual or goto a Kragen store and just flip thru a Haydem or Chilton repair book real quick.

Posted on May 03, 2010

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What lbs do I tighten the head bolts to on my 1990 Honda prelude SI 2.1L DOHC and in what order do I tighten them?


Go inside the local Autozone and ask for the cylinder head torque specs. They will look it up and print it out for you. It will contain the torque specifications as well as the sequences. Happy torquing.

Mar 01, 2015 | 1990 Honda Prelude

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Torque specs for rocker arms


The 12mm head bolts torque to 15 ftlbs.
the 10mm head bolts torque to 9 ftlbs.
crosshatch pattern for the sequence.

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Oil around the spark plugs


Check to make sure the plugs are tight and torqued to manufacturer's specs. Also, your Valve cover gasket(s) may need replaced.

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Head torque specs for 92 honda accord with f22a1


Thanks for using FixYa.

To install:
  1. Install a new head gasket on the engine, making certain it is positioned correctly. The cylinder head dowel pins and the oil jet must be in place. Refer to the illustrations if necessary.
  2. Install the head. Lower it straight down onto the block, aligning it correctly.
  3. Apply clean engine oil to the bolt threads and the contact face of the bolt head. Install the head bolts finger-tight.
  4. On all models except 1988-89 DOHC Prelude and 1992-95 Preludes with 2.3L and VTEC engines, tighten the head bolts following sequence A. On 1988-89 DOHC Preludes, use sequence B. Use sequence C on 1992-95 Preludes with 2.3L and VTEC engines.
    1. On 1984-89 Accords and 1984-91 Preludes, tighten the bolts in two passes. The first pass should bring the bolts to about 22 ft. lbs. (30 Nm). On the second pass, tighten the bolts to their final torque of 49 ft. lbs. (68 Nm).
    2. On 1990-93 Accords, tighten the bolts to 29 ft. lbs. (40 Nm) on the first pass, 51 ft. lbs. (70 Nm) on the second pass, then tighten the bolts to their final torque of 78 ft. lbs. (108 Nm).
    3. On 1994-95 Accords and 1992-95 Preludes, the bolts are also tightened in three passes. Tighten the bolts to 29 ft. lbs. (40 Nm) on the first pass, 51 ft. lbs. (70 Nm) on the second pass, then tighten the bolts to their final torque of 72 ft. lbs. (100 Nm).

      0900c152800b80b4.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Fig. 9: Cylinder head bolt torque sequence A

      jturcotte_2331.gif

      Fig. Fig. 10: Cylinder head bolt torque sequence B


      0900c152800b80b6.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Fig. 11: Cylinder head bolt torque sequence C


  5. If applicable, assemble the intake and exhaust manifolds to the head. Use new gaskets.
  6. If applicable, install the cam, rockers and camshaft holders.
  7. If equipped, install the EGR crossover and air suction pipes.
  8. Connect the exhaust pipe to the manifold using new nuts.
  9. Install the timing belt.
  10. Install the valve cover.
  11. Install the cylinder sensor (if equipped) and the distributor.
  12. If applicable, install the alternator.
  13. Install the power steering pump, then connect the inlet hose to the pump.
  14. Install the accessory drive belts. Adjust the belt tensions.
  15. Install the heater hoses.
  16. Install the cruise control actuator if it was removed.
  17. Connect the spark plug wires. Connect all the wire harnesses and vacuum hoses to the cylinder head, intake manifold and throttle body/carburetor.
  18. Connect the throttle control cable and/or accelerator cable at the throttle body.
  19. Connect the fuel lines.
  20. Install the brake booster, PCV and charcoal canister vacuum hoses.
  21. Install the air cleaner and intake duct.
  22. Refill the engine coolant. It is recommended that the engine oil be changed whenever a cylinder head is removed.
  23. Connect the negative battery cable.
  24. Start the engine, allowing it to idle. Bleed the cooling system. Check the work area carefully for any signs of fluid leakage or any indication of the timing belt rubbing or slapping the covers.

Sep 25, 2011 | Honda Accord Cars & Trucks

1 Answer

Hi there, i want to know is the honda prelude si1988 and honda prelude si 1990 both has the same motor. like 2.0L. thanks.


very similar can definetly bolt in there were some differences in the water temp sensor and the speedo sensor but it can work as a parts or swap engine

Feb 25, 2011 | 1990 Honda Prelude

1 Answer

Cyl head bolt torque 1990 honda prelude dohc


mcdevito75 here, your local parts store can give you the specs.

Jun 17, 2010 | 1990 Honda Prelude

1 Answer

I need the torque specs on a 92 prelude 2.3


Oil the gasket first with engine oil - let it soak for a minute or two (its in the manual!) First stage 40nm - second stage 70nm - third stage 100nm - Tightening sequence - looking from top of engine with the flywheel on the left, top set of bolts from top left to top right bolts 1,2,3,4,5--------- Bottom set of bolts bottom left to bottom right 6,7,8,9,10-------- tightening sequence is - 8,3,7,4,9,2,10,1,6,5 -

Jan 01, 2010 | 1990 Honda Prelude

1 Answer

I need to replace my speed sensor on my 90 prelude si


Look at the rear top of the gearbox/clutch bellhousing, below and behind the distributor. Well hidden, two bolts to fix, with a plug on the top.

Mar 28, 2009 | 1990 Honda Prelude

2 Answers

Spark plug gaping


Go to your nearest Autozone or other parts house and buy an inexpensive plug gapper. I gap the Honda plugs at .045 .

Jun 16, 2008 | 1991 Honda Prelude

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