1997 Pontiac Grand Prix Orifice Tube

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1997 Pontiac Grand Prix Orifice Tube

Postby BIGPROFITT » Mon Jul 18, 2005 5:41 pm

Where is the orifice tube on a 1997 Pontiac Grand Prix?
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Postby GM Tech » Mon Jul 18, 2005 5:54 pm

Straight from the service manual...............for a 1998 GP your 97 should be the same.............

Expansion (Orifice) Tube Replacement
Removal Procedure
Remove the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
Remove the EBTCM. Refer to EBTCM Replacement in Antilock Brake System.

This is the brake module

Important: If the expansion (orifice) tube is restricted or plugged, perform the following procedure:


Remove the expansion (orifice) tube.
Remove the impacted residues.
Using a heat gun (hair dryer, epoxy dryer or the equivalent), apply heat approximately ¼ inch from the dimples on the inlet pipe. Do not overheat the pipe.
While applying heat, perform the following steps:
Use needle-nose pliers in order to grip the orifice tube.
Use a turning motion along with a push-pull motion in order to loosen the impacted orifice tube.
Remove the orifice tube.
Add 30 ml (1 oz) of Polyalkylene Glycol (PAG) Synthetic Refrigerant Oil to the system.
Lubricate the new expansion (orifice) tube and O-ring seal with mineral base 525 viscosity refrigerant oil and insert into the inlet pipe.
Install tube with the smaller screen (3) first.
Remove the O-rings seals (2).
Installation Procedure




Important: Coated the new O-ring seals (2) with mineral base 525 viscosity refrigerant oil.


Install the new O-ring seals (2). Install the new expansion (orifice) tube with the shorter screen (3) end in first.
Install the liquid line/suction line bracket.
Connect the electrical connector to the A/C refrigerant pressure sensor.
Install the EBTCM. Refer to EBTCM Replacement in Antilock Brake System.
Evacuate and charge the system. Refer to Refrigerant Recovery and Recharging .
Inspect the system for leaks. Refer to Leak Testing .
Install the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
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Postby BIGPROFITT » Mon Jul 18, 2005 6:12 pm

Thanks for the info. Where can I see this manual online?
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Postby BIGPROFITT » Tue Jul 19, 2005 2:40 am

Where can I find this manual online on in what store?
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Postby GM Tech » Tue Jul 19, 2005 3:38 am

Try books4cars.com to buy the service manual.... other than that maybe alldata......
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
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Postby BIGPROFITT » Tue Jul 19, 2005 11:34 pm

Who made the service manual you are referring to in your answer on how to remove/replace the orifice tube (i.e. Chilton, Haynes, etc)? Thanks
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Postby GM Tech » Wed Jul 20, 2005 3:20 am

General Motors made it- Helms publishes it.........it is the OEM manual.......
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
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Postby BIGPROFITT » Wed Jul 20, 2005 3:24 am

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Postby GM Tech » Wed Jul 20, 2005 11:30 am

yes - these manuals are what I use exclusively- never touch a Haynes or Chiltons..........
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
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Joined: Tue Jun 28, 2005 11:23 am
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Postby BIGPROFITT » Thu Jul 21, 2005 12:37 am

Found that this manual costs $135. I have the Air Cleaner Assembly removed. How do I remove the EBTCM? Thanks for your help.
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Postby GM Tech » Thu Jul 21, 2005 11:44 am

Why do you need to access the orifice tube?-- V-5 compressors rarely fail and plug the orifice- on these cars the failure mode is a worn out compressor shaft seal- I replace the seal and recharge- never check this #$#@$ orifice tube UNLESS I have a high side restriction..... just curious.... the EBTCM removal is below.......

EBTCM Replacement
Removal Procedure
Notice: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

Turn the ignition switch to the OFF position.
Pull out lock tab from the EBTCM harness connector (1).
Disconnect the EBTCM harness connector .

Disconnect the pump motor connector (3) at the bottom of the EBTCM.
Remove the six EBTCM to BPMV screws (2) and discard.
Separate the EBTCM (1) from the BPMV (5) by gently pulling apart until separated.
Important: Be careful not to damage seal. Do not pry apart using a tool.

Important: Care must be taken not to damage the solenoid valves when the EBTCM is removed from the BPMV.

If equipped with ABS/ETS, remove one wave spring (1) between the EBTCM and BPMV and discard.
Important: Note the location and the orientation of the wave spring in order to aid during installation.

If equipped with ABS/TCS remove two wave springs (1) between the EBTCM and BPMV and discard.
Important: Note the location and the orientation of the wave springs in order to aid during installation.

Installation Procedure
Important: Only the new wave spring(s) and screws supplied with the new EBTCM should be used.

Clean the BPMV gasket surface with alcohol using a clean rag.

If equipped with ABS/ETS, install one wave spring (1) between the EBTCM and BPMV. Use location and orientation noted during removal.

If equipped with ABS/TCS, install two wave springs (1) between the EBTCM and BPMV. Use locations and orientation noted during removal.

Install the EBTCM (1) to the BPMV (5).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Tighten
Tighten the top four mounting screws (2) to 2.9 N·m (26 lb in.). Tighten screws in an X pattern.

Tighten
Tighten the bottom two mounting screws (2) to 2.9 N·m (26 lb. in.).

Connect the pump motor connector (3) to the bottom of the EBTCM.

Connect the EBTCM harness connector. Push in lock tab (1).
Turn the ignition switch to the RUN position, engine off.
Perform the Diagnostic System Check
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
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Postby BIGPROFITT » Thu Jul 21, 2005 7:30 pm

I have replaced the compressor and accumulator. So you are saying that if it were you, that you would not worry about replacing the orifice tube? I ask because it sounds like so much fun to remove and replace the EBTCM. The reason I was going to remove the EBTCM in the first place was your previous post on how to remove/replace the orifice tube says to remove the EBTCM. Thanks again.
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Postby GM Tech » Thu Jul 21, 2005 7:48 pm

Correct- I don't ever even replace the accumulator or the compressor- I fix the shaft seal by replacing the leaking seal.. you will know it the OT is plugged by the resulting high side pressure. My bet is it will be fine..............
'95 Chevy 3500 454 Dually 142,000 miles
'94 Chevy Astro Van 358,000 miles!
'86 Buick Park Ave 192,000 miles
'86 GMC S-15 Pick-up 150,000 miles
'92 Chevy Lumina Van - 265,000 miles- given to me to see how far it can go! all above are white!
User avatar
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Posts: 1096
Joined: Tue Jun 28, 2005 11:23 am
Location: Dayton Oh

Postby BIGPROFITT » Thu Jul 21, 2005 8:01 pm

Again I appreciate your advice. I am not near the mechanic you are so I would never attempt to replace the shaft seal. I am going to take the old compressor and play with it to see if I can though. I got a compressor from a 2002 Chevy Impala with 26000 miles from a local salvage yard for $50 with a 30 day warranty. Found it on http://www.car-parts.com, cool website.
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Postby BIGPROFITT » Sat Jul 23, 2005 4:09 am

This has nothing to do with AC. My key gets stuck in the ignition about every other time. Any idea why or how to fix it?
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Postby BIGPROFITT » Sun Jul 24, 2005 5:05 am

Please help me? Read above message.
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