Question about 1992 Pontiac Firebird

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How to adjust the engine valves? - 1992 Pontiac Firebird

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There are many different methods to adjusting valves. Instead of trying to describe them to you I'll send you this link. This page is for lt1 firebirds but it is the same procedure for your car whether it's a v6 or v8.

Posted on May 14, 2010

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Posted on Jan 02, 2017

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How do you adjust idle speed 1991 johnson 100 hp


not important, what's important is that they are absolutely clean, including the four brass high speed jets located in the bottom center portion of the carburetor.

That model engine's carburetors has fixed jets, BUT if the slow speed jets are adjustable, earlier model carburetors have been installed. If so...................

The four adjustable needle valves control the flow of fuel in relation to the set air flow, adjusted as follows (if needed).

(Dual Carb V/4 With 4 (2 each carb) Slow Speed Adjustable N/Valves)
(J. Reeves)

The adjustment procedure of the carburetor slow speed needle valves follows. NOTE... if the needle valves turn too freely, replace the nylon bearing retainer (the nylon item at the front of the carb that the needle valve goes through first) with the newer type RED retainer #315232. If your engine has that weird linkage that connects all four of those needle valves, the newer RED retainers will enable you to discard that linkage. The RED retainers make it impossible for the needle valves to vibrate out of adjustment.

(Carburetor Adjustment - 2 Slow Speed Adjustable Needle Valves, each carburetor)

Initial setting is: All (4) Slow speed valves = seat gently, then open 1-1/2 turns.

Facing the carburetors, start with the top left needle valve, then the top right valve, then the bottom let valve, then the bottom right valve. It may be necessary to redo these steps to get the adjustments ideally set

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running.

Eventually you'll hit the point where the engine wants to die out or it will spit back (sounds like a mild backfire). At that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

Do not attempt to gradually adjust all four of the valves at the same time. Do one at a time until you hit the above response (die out or spit back), then go on to the next valve.

When you have finished the above adjustment, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

Jun 28, 2017 | Cars & Trucks

1 Answer

Why adjust the tappets when engine is cold?


adjust the tappets when cold allows you to get the engine running with out causing valve or engine damage
you do the final adjustment when hot as the stem expands in length and takes up the cold adjustment
if the cold adjustment is too close because you didn't make that adjustment the the valves will not seat properly when hot and will burn the edges of the valves

Aug 03, 2016 | Cars & Trucks

1 Answer

Adjust rocker arms on 1990 2.9 ford


this is from the AutoZone web site.

2.9L Engine
No periodic valve lash adjustments are necessary on this engine. The engine utilizes a hydraulic valvetrain to automatically maintain proper valve lash. However, some earlier models have an adjusting screw on the rocker arm, which is used when assembling the engine to properly preload the lifter. If the engine has been disassembled, and the valve train parts were not kept in order, or there is an audible sound from the rocker arms while the engine is running, perform the adjusment procedure below.
The following procedure should be performed on a cold engine.
  1. On the cylinder to be adjusted, position the cams so that the tappets are in the base circle area.
  2. Loosen the adjusting screws until a distinct lash between the roller arm pad and the valve tip can be noticed.

The plunger of the hydraulic tappet should now be fully extended under the load of the internal spring.
  1. Carefully screw in the adjustment screws until the roller arms slightly touch the valves.
  2. To achieve the normal working position of the plunger, screw in the adjusting screw 1 1 / 2 turns, equivalent to 2mm.


  3. here is the site address. scroll down the page & you will see your engine size - 2.9
SAVE 20 GET BONUS 10 GIFT CARD ON ONLINE SHIP TO HOME ORDERS OF 100 OR MORE

Feb 06, 2015 | Ford Cars & Trucks

2 Answers

Valve lash procedure


i need to know how to adjust the valves on 02 pont sunfire

Nov 20, 2011 | 1991 Chevrolet K1500

1 Answer

How to do valve adjustment 2002 escort 2.0 liter SOHC


The valves in this engine are a hydraulic design and require no adjustment nor is there any provision for adjustment in the design. If the valves are noisy then you have defective valve train moving parts, commonly on this engine that is the hydraulic followers (referred to as "Lifters" in older OHV engines).

Oct 10, 2011 | 2002 Ford Escort

1 Answer

I need to adjust the valves


12th inlet and 14 exhaust ,4cyl engine all valves add to 9 ,,example--- no1 down adjust no8 ----no2 down adjust no7 all values add to 9 simple if you take your time to count the valve thats down subtract from 9 and then adjust that number ,this system works on all engine regardless of what the haynes book says ,6 cyl engine then its 13 ,and a 8 cyl engine then 17 ,in cases of 16 valves in a 4 cyl engine then its still the same as two valves work as one ,simple

Sep 26, 2011 | 1987 Subaru Gl 4WD

2 Answers

Overhead valves making noise like they need ajusting


Valve Lash ADJUSTMENT 1.6L Engines NOTE: Measure valve clearance with the engine cold.
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove the valve cover.
  3. Set the engine to Top Dead Center (TDC) of the compression stroke for the cylinder to be adjusted.
  4. Check the valve clearance. The valve clearance specifications are as follows:
    • Intake valves: 0.005-0.007 inches (0.13-0.17mm)
    • Exhaust valves: 0.005-0.007 inches (0.13-0.17mm)
  5. After adjustment, tighten the locknuts to 11-14 ft. lbs. (15-19 Nm).
  6. Repeat for each valve to be adjusted.
1.8L, 2.0L and 2.5L Engines The 1.8L, 2.0L and 2.5L engines utilize automatic hydraulic lash adjusters to maintain proper valve lash at all times. Periodic valve lash inspection and adjustment is not necessary or possible. prev.gif next.gif

Sep 14, 2010 | 2000 Chevrolet Tracker

1 Answer

I have to adjust valve clearance on my ford 110 engine from 1994. year. Can you tell me right clearance of inlet valves and inlet valves


What engine do you have (size)? Valve adjustment is generally a thing of the past after the introduction of hydraulic lifters (no adjustment). In 1994 your engine should have hydraulic lifters and are not adjustable. Is this a high performance engine? New camshaft, lifter, and rocker set that are adjustable?

Aug 04, 2010 | Ford F-100 Cars & Trucks

1 Answer

How to adjust valve clearance on a 1999 sunfire 2.2L engin. I heard noise in my engine and I am thinking its only the valve clearance need to be adjust.


There is no valve adjustment for that engine, Hydraulic lifters, You might remove the valve cover and see if you have a rocker arm loose

Mar 13, 2010 | 1999 Pontiac Sunfire

1 Answer

Want to know what the valve clearances are for my 1999 hyndai excel


Adjust the jet valve clearance before the adjustment of the
intake valve clearance.
Jet valve clearance (hot engine)
[Standard value]. . . . . . . . . . . . . . . . . . . 0.25 mm (0.010 in.)

now adjust valve clearance
Valve clearance (hot engine) [Standard value]
Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 mm (0.006 in.)
Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 mm (0.010 in.)

Jul 30, 2009 | 1990 Hyundai Excel

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