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How can I tell if the seals are bad and not the whole water pump on a 05 envoy. Before I purchase the whole pump and all I need is the seals?

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  • Cars & Trucks Master
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You can't buy a water pump seal by itself. Gasket, yes. Seal, no. If you're going to go to the trouble to remove it to replace a gasket, you replace the whole thing

Posted on Aug 10, 2017

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Posted on Jan 02, 2017

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SOURCE: I was wondering if there's a way to determine if

no you need to replace the water pump if its leaking from the seal by the shaft or are you saying it needs a new gasket?

Posted on Jun 06, 2009

whtbuick
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SOURCE: how to tell if water pump is bad 3800 gm

The 3800's also had other problems. And also Issues for those that are unaware.

Be aware that there are bleeder screws to bleed air out of the system when filling the coolant. With out properly bleeding the system the coolant can Vaporlock in the system causing overheating.

Also if it has been over heated you need to check for a blown head gasket. Smell the antifreeze, if it smells burnt you should be concerned. Next with the engine cold and the system properly bled, leave the radiator cap off and start the engine, if it bubbles constantly or bursts out of the open radiator cap, seek diagnosis at your local repair shop as they have the equipment to do so properly.

I also suggest using an Infrared Thermometer to check temperatures with. if the engine is at 230f and the upper hose is at 200f, and the lower hose is still cool you likely have a clogged radiator. If the upper hose is cool as well then you have a bad water pump or t-stat. if the upper hose slowly warms, and you start to get bubbles then it's likely a water pump with the fins eroded off by electrolysis (gotta change that coolant at regular intervals)

Also make sure the radiator fans turn on.

Posted on Mar 21, 2014

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1 Answer

Code 410


code po410 on a 2004 gmc envoy is that there is a problem with the secondary air injection system, you will need to check the fuse located in the engine compartment first, the next step is to start the truck cold and listen for the air pump to turn on for a few seconds, this will sound like a jet engine but not that loud, after it runs for 5 min and you dont hear it then you may have a bad pump which is located under the driverside on frame but if you hear the pump then you may have a bad valve, this valve is located on the exhaust manifold area and has a hose from the pump to valve, remove the hose and check for water, drain any water in the hose, also remove hose at pump and drain, the most common cause for this code is the valve is not opening and the air pump gets water inside and goes bad, thats the po410 code. a quick note; if fuse is blown look under truck near pump and check relay as it fills with water and blows fuse, if this is the case replace relay and blow water out of connector.good day.

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1 Answer

Need instruction for replacing water pump 2004 GMC Envoy 4.2 liter engine.


TO REPLACE WATER PUMP.FIRST YOU HAVE TO DRAIN THE COOLANT SYSTEM. REMOVE AIR INTAKE DUCT AND RESONATOR. REMOVE THE RADIATOR SHROUD AND FAN CLUTCH ASSEMBLY REMOVE THE DRIVE BELT. REMOVE WATER PUMP PULLEY.YOU NEED A PIN SPANNER WRENCH OR STRAP WRENCH TO HOLD WATER PUMP PULLEY WHILE LOOSEN WATER PUMP PULLEY BOLTS .YOU CAN BUY STRAP WRENCH OR RENT PIN SPANNER WRENCH AT AUTO ZONE PARTS STORES OR OTHER STORES HAS TOOLS CAN BE RENT. ONCE WATER PUMP PULLEY REMOVED. REMOVE THE WATER PUMP MOUNTING BOLTS. REMOVE WATER PUMP. IF WATER PUMP STUCK YOU CAN TAP WITH SOFT FACE HAMMER OR A LONG PIECE OF ROUND WOOD.WHEN WATER REMOVED.YOU NEED TO CLEAN THE SEALING SURFACE CAREFUL DONT SCRATCH SEALING SURFACE. YOU CAN BUY CAN OF SPRAY GASKET REMOVER.CLEAN SURFACE GOOD THEN WIPE WITH LACQUER THINNER OR ACETONE.THEN GET WATER PUMP NEW GASKET MATCH HOLES UP WITH GASKET TO WATER PUMP. ONCE HOLES MATCH UP APPLY RTV SEALANT ON BOTH SIDES WATER PUMP GASKET. THEN PUT GASKET ON WATER PUMP THEN INSTALL WATER PUMP TO VECHICLE.TORQUE WATER PUMP BOLTS TO 89 INCH LBS .TIGHTEN WATER PUMP PULLEY BOLTS TO 18 FT LBS THEN PUT EVERY THING BACK VISA VERSA.

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1 Answer

2002 gmc envoy water pump


Hi, Will need specific info to help. Are you looking to replace the water pump and need instructions? If so, will need to know engine size in your Envoy. Thanks, Mike

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3 Answers

Hello Coolant leak under timing belt pulley... Seal on that side of water pump ??


YES SOUNDS LIKE YOUR WATER PUMP BEARING AND SEAL ARE GOING BAD BUT SEE IF YOUR TOP RADIATOR HOSE IS NOT LEAKING AND RUNNING DOWN THE FRONT OF THE MOTOR AND MAKE YOU THINK YOUR PUMP IS BAD

Mar 01, 2011 | 1992 Mazda Protege

1 Answer

Water leaking right by the water pump. does pump just go bad or is there another reason why it would just start leaking?


Shaft seals on the pump do go bad. Just replaced one myself. The gasket for the pump housing itself may be leaking. You have to look real hard to tell which is leaking. If you replace the pump, you'll kill both birds with one stone since you need to use a new gasket anyhow.

Oct 09, 2010 | 2001 Ford F150 Styleside SuperCrew

1 Answer

My 05 envoy is making a winding sound for about 18 months. it gets louder the faster i go.no one can agree ..thx


Can you tell if it's the front/back? Wheel bearing could be going bad. Have you had the brakes checked, the caliper on one of the wheels may not be releasing completely, enough for you not to tell a difference in, but enough for the pads and rotor to slightly friction each other.

Jan 07, 2010 | 2005 GMC Envoy

5 Answers

Why is there a water leak coming from the water pump?


i would say you answered your own question, if there is water leaking from the water pump i would say the water pump is leaking and it needs to be replced,either the bearing is bad and its leaking out the shaft,or the seal is bad and its leaking outta there either way you need a new water pump,check the belt for wear when you replace it,,

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1 Answer

05 Trail Blazer Vortec 4200 center pulley seems to have a bad bearing behind it. Is that a pulley or idler problem or is it a water pump issue?


I have an 05 TB. I have replaced the idler pulley twice in the three years I owned it. Cheap and quick fix. Call your dealer and get the part. Problem is that the part comes with the whole bracket. Take the pulley of the new part and put it on the existing bracket already on your vehicle. 30 minute fix.

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