Question about 1997 GMC Sierra

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There is evidently a coolant leak from the intake manifold gasket. I have to replace the #4 injector as well, please describe additional steps for replacing this gasket and anything else that should be done at same time.

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  • kdewald Nov 19, 2009

    Thanks, I'll get the manual too.

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  • GMC Master
  • 19,396 Answers

Hi.

I will try to describe the intake mainfold gasket replacement.

Empty coolant fluid.

Disconnect the battery, then disconnect all wires to air intake, remove air intake, and remove the throttle body.
Label all wiring and hoses putting the same label on their connectors, so that you will know what and where when mounting back parts.

Undo the power steering pump bolt and move the pump on one side, do not disconnect the pump.

Disconnect the TPS connection.

Unscrew the manifold and push it on one side, remove the dowel pins located under the manifold and secured to the head to free the mainfold.


Clean the surface of the gasket material and debris and start installing the new Intake Manifold

Put the new manifold gasket on the head, and install the manifold following operations in reverse order.

Do not forget to refill coolant.

The replacement is quite a simple repair, if you want instructions with picture, then ordering a Chilton manual may be an idea.

Regards.



Chilton GMC Sierra

Posted on Nov 19, 2009

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2 Answers

How do i stop a leak from intake manifold gasket?


Please take your vehicle to a qualified mechanic. A leak in the intake manifold gasket can cause catastrophic results not only are you losing coolant to the outside but may also be leaking coolant internally which could contaminate the oil and cause the engine to fail due to loss in lubricating properties. Also, if not torqued properly you may have a warped intake manifold. Please see a good mechanic it may cost more but you risk a much larger cost to replace an engine

Aug 03, 2016 | Cars & Trucks

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Intake Manifold gasket replacement and/or leaking= Ford


Intake Manifold gasket~

Replacing intake manifold gasket:
Replacing the intake manifold gasket, I used the tube kind, it's a make it youself for about $6 (it's blue and the consistancy of toothpaste) follow directions carefully! You can get a tube at Autozone or any car parts store. Has been working great. Just ask the cashier for the make it yourself kind of intake manifold gasket. Sorry, I don't remember the name of it, it's been that long...lol...

As for the Intake Manifold leaking coolant....It could, but shouldn't. One of the largest problems I've seen for coolant to leak out the Intake Manifold has been due to pressure in the system somewhere... Check the classic area:
Water pump- look for either water seapage and/or coolant. You'll know if it is because you will see real water either coming out of the water pump leak hole or under the thermostat. Most of the time coolant will pool where your heater hose runs in the intake manifold.

Mentioning heater hose. Check for leaks, holes, and/or cracked heater hoses. In-addition to the water pump, heater hoses...Check the transmission system, exhaust system, fuel system, radiator system, A/C system, secondary fan (located above the water pump housing), and thermostat.Also, check all electrical connections....Hummm....This is almost the entire workings of the vehicle.

NOTE: "It seems to be an infinity kinda thing... Once one thing starts to fail and is ignored, you are bound to be fixing a chain of event failures. Therefore, Do not ignore even the smallest problem or you'll be bound for life in repairs...."

on Jun 25, 2010 | Ford Expedition Cars & Trucks

1 Answer

I've got a 2002 Buick LaSabre. Firewall looks melted..car gets hot on short run. I do have small leak brake fluid. Could that be the problem?.


That would not cause the engine to get overheated. It may be too late to save your engine, but check if you have coolant loss and brown sludge on the oil dipstick, or if under the oil fill cap there is a milky brown substance. This is evidence of coolant getting into the oil. This engine in LeSabres has a common problem of intake manifold gasket failure, leading to loss of coolant that winds up in the cylinders and into the oil. If not driven much or if the engine did not get too hot, the cylinder heads and head gaskets may not have been ruined, but if overheated badly, the engine may be a total loss.

The intake on the engine is two parts: an upper intake manifold that is plastic (and just waiting to fail-many owners have had to replace this) and an aluminum lower intake manifold. The gaskets under the lower manifold are the ones that develop leaks. Because GM used inferior factory gaskets (also made of plastic) as a cost-cutting measure. They took a very good engine, well known for durability, and shaved costs with inferior gasket material-go figure.

Dec 06, 2014 | Cars & Trucks

1 Answer

Location of freeze plug on 2001 malibu


I had a 2000 malibu 3.1 and the manifold gasket was leaking. Model years affected, 97-04. Check the recovery coolant tank and if it looks like a milk shake instead of coolant, then you have a bad intake manifold gasket. I replaced mine a few years ago and all was fine. Engines affected are the 2.4-3.1-and 3.5, look very carefully around the intake manifold and you will see it if its leaking! operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks. Because oil will mix with coolant if gasket is bad. Hope this helps you out! Good-Day!

Sep 19, 2014 | 2001 Chevrolet Malibu

1 Answer

Replacing a head gasket in a 1993 buick century


Before head gasket replacement have you checked these
Intake Manifold Gaskets May Leak Coolant or Engine Oil
engine or leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
Leaking Water Pump May Cause Coolant Loss and Overheating
A coolant leak may develop from the . The may overheat as a result of the coolant loss. A leaking water pump should be replaced.
Headgasket replacement
step 1. undo negative battery cable or completely remove battery and tray.
step 2. remove air cleaner and associated piping if it is in the way to allow access to head, drain cooling system and remove upper radiator hose.
step 3. remove top portion of exhaust manifold.
step 4. remove intake manifold and fuel injection rail as necessary
step 5. remove spark wires and valve cover.
step 6. remove drive belts and top timing cover before removing timing belt find all alignment marks and paint to improve your visibility and aid in reassembly if no marks are present remove spark plug # 1 and rotate until piston is at tdc and check timing mark on crankshaft that it is on 0 then paint the belt and cams anything that has teeth that the timing belt rides on make a mark to aid in reassembly even if you are replacing t-belt at least you can compare to new belt and transfer marks, release tension on t-belt tensioner and remove t-belt.
step 7. remove head bolts start loosening at inside and work outwards reemove head bolts and pay attention to sizing and placement.
carefully check for anything that is still attached to head and if free tap head with rubber or dead blow hammer to free from block and lift straight up so as not to ruin or bend any of the alignment pegs.
step 8. remove head gasket material with non-scratching tools or scrapers or buff pads made for that job. making note of where it was blown.
step 9. decide if you should send head to machine shop to have mating surface made flat again and also to have valves and related parts inspected or replaced. usually about $300-$400
step 10. inspect block remove all gasket material look for pitting or scarring also use straight edge to determine if it is straight or if it needs to be resurfaced by a machine shop.
step 11. install new headgasket and check fit. If all is good reassemble in reverse order of removal and I always like to replace crank seal ,cam seal, water pump, t-belt and tensioner also thermostat, drivebelts, spark plugs, cap, rotor, wires, pcv valve, intake manifold ,exhaust manifold gaskets.
this is just a broad overview hope it helps you will have to get haynes manual or similar for head torque values and what not

Aug 05, 2014 | 1993 Buick Century

1 Answer

I need to see a coolant system hose that leaks does the intake have to be removed


Yes there are cooling system hoses under the intake, here are instructions to remove the intake.

Instructions
  1. Remove the Intake Manifold
    • 1Drain the cooling system and relieve the pressure in the fuel system. Disconnect the negative battery cable, the air intake duct, the IAC valve connectors, the throttle position sensor and switch connectors, and the EGR solenoid valve.
    • 2Pull the EVAP canister vacuum and purge hoses, the vacuum hoses from the EVAP, the brake cylinder, pressure regulator and EGR tube. Tag and disconnect the spark plug wires. Remove the distributor cap.
    • 3. Take out the three left bank injector connectors, the thermal transmitter, the ground harness, breather pipe and the upper manifold. Disconnect the fuel feed and return lines and plug them with golf tees to prevent fuel spillage.
    • 4Locate the right injector harness connectors and disconnect them as well as the fuel rail and injectors. Remove the coolant temperature switch harness connector and the water hose from the thermostat.
    • 5Loose the bolts on the lower manifold in sequence. Remove the bolts and left the intake manifold from the engine. Remove the gasket and discard it.
    • 6Clean the mating surfaces by scraping the old gasket material and carbon deposits. Clean the surfaces with solvent and inspect them for damage.
    Install the Intake Manifold
    • 7Put a new gasket in place and install the lower intake manifold to the engine. Tighten the bolts in sequence as follows: first pass-35 inch pounds; second pass-78 inch pounds and third pass 70 to 84 inch pounds.
    • 8Connect the ECT sensor connector, the fuel supply manifold and the right bank injector connectors. Connect the fuel lines and then install the upper intake manifold. Put the breather pipe in position.
    • 9Install the intake manifold ground cable, the thermal transmitter, the left bank injector connectors and the distributor. Reconnect the spark plug wires.
    • 10Continue reconnecting all the components, reversing the order in which they were removed. Connect the negative battery cable to the terminal. Refill the cooling system with the appropriate coolant.
    • 11Start the engine. Check for fuel or vacuum leaks.

Jul 02, 2012 | 1997 Mercury Villager

3 Answers

How do I remove the head? (Blown Head gasket)


prev.gif next.gif Cylinder Head REMOVAL & INSTALLATION 2.3L Engine
  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable, then drain cooling system into a suitable container.
  3. Detach the heater inlet and throttle body heater hoses from water outlet. If accessible at this time, disconnect the upper radiator hose from the water outlet.
  4. Remove the exhaust manifold. For details, please refer to the procedure located in this section.
  5. Remove the intake (camshaft housing for SOHC) and exhaust (DOHC only) camshaft housings.
  6. Unfasten the oil fill tube bolt/screw then remove the oil fill cap and level indicator assembly. Pull the oil fill tube upward to unseat from block.
  7. Label and disengage the injector harness electrical connector.
  8. Detach the throttle body-to-air intake duct.
  9. Tag and disconnect the power brake vacuum hose from the throttle body.
  10. Remove the throttle cable bracket.
  11. Remove the throttle body from the intake manifold with the electrical harness and throttle cable attached and position the assembly aside.
  12. Tag and disconnect the MAP sensor vacuum hose from the intake manifold, then remove the intake manifold brace.
  13. Detach the electrical connectors from the MAP sensor, IAT sensor and the EVAP canister purge solenoid.
  14. If not already done, detach the upper (inlet) radiator hose from the water outlet.
  15. Disengage the coolant temperature sensor connector(s).
  16. Unfasten the cylinder head bolts in reverse order of the installation sequence shown in the accompanying figures.
  17. Lift the cylinder head from the engine block. Remove and discard the gasket. Inspect the oil flow check valve for freedom of movement.
  18. Using a suitable solvent, thoroughly clean and dry all bolts, bolt holes and mating surfaces. Inspect the head bolts for any damage and replace, if necessary. If using a scraper to clean the old gasket material from the mating surfaces, use only a plastic or wood one, NOT a metal scraper. Do NOT allow any debris to fall into the engine! To install:
  19. Place a new cylinder head gasket on the cylinder block, then carefully position the cylinder head in place.
  20. Sparingly coat the head bolt threads with clean engine oil, then allow the oil to drain off before installing.
  21. On 1988-89 engines, install and tighten the cylinder head bolts, in sequence, as follows:
    • Step 1 - Tighten all head bolts in sequence to 26 ft. lbs. (35 Nm)
    • Step 2 - Using a torque angle meter, tighten the short bolts an additional 80°and the long bolts an additional 90°in sequence Fig. 5: Cylinder head bolt tightening sequence - 1988-89 2.3L engine 86883121.gif
  22. On 1990-91 engines, tighten the cylinder head bolts, in sequence, as follows:
    • Step 1 - Tighten all head bolts in sequence to 26 ft. lbs. (35 Nm)
    • Step 2 - Using a torque angle meter, tighten the short bolts an additional 100°and the long bolts an additional 110°in sequence Fig. 6: Cylinder head bolt tightening sequence - 1990-91 2.3L engine 86883122.gif
  23. On 1992 engines, tighten the cylinder head bolts, in sequence, as follows:
    • Step 1 - Tighten, in sequence, head bolts 1-6 to 26 ft. lbs. (35 Nm), 7-8 to 15 ft. lbs. (20 Nm) and 9-10 to 22 ft. lbs. (30 Nm).
    • Step 2 - Tighten all head bolts, in sequence, an additional 90°using J 36660 or equivalent
    • Step 3 - In sequence, loosen each bolt one turn, then immediately re-tighten to the specified torque
    • Step 4 - After completing step 3 on all 10 bolts, tighten each bolt, in sequence, an additional 90° Fig. 7: Cylinder head bolt tightening sequence - 1992 2.3L engine 86883123.gif
  24. On 1993-95 vehicles, tighten the cylinder head bolts to the specifications shown in the accompanying figures. Fig. 8: Cylinder head bolt tightening sequence and specifications - 1993 2.3L engine 86883124.gif
    Fig. 9: Cylinder head bolt tightening sequence and specifications - 1994-95 2.3L engine 86883125.gif
  25. Engage the coolant temperature sensor electrical connector(s).
  26. Connect the upper radiator hose to the water outlet.
  27. Install the intake manifold bracket.
  28. Attach the following electrical connections: MAP sensor, IAT sensor, and the purge solenoid.
  29. Using a new gasket, install the throttle body to the intake manifold.
  30. Install the accelerator control cable bracket.
  31. Connect the throttle body-to-air intake duct.
  32. Install the oil fill tube and level indicator.
  33. Install the camshaft housing(s).
  34. Install the exhaust manifold. For details, please refer to the procedure located in this section.
  35. Connect the heater inlet and throttle body heater hoses to the water outlet.
  36. Fill all fluids to their proper levels.
  37. Connect the battery cable, start the engine and check for leaks.

Sep 24, 2010 | 1992 Oldsmobile Achieva

2 Answers

Coolent leaking from top of motor probably from intake manifold how do i replace gasket?


You may not need to, try a "rad weld" type of coolant additive. Most will stop the leak and stay in the system to block any future leaks.

Feb 02, 2010 | 1996 GMC Suburban

2 Answers

Coolant is leaking around intake manifold and temp gauge is not working on my 2000 chevy malibu 3.4 litre


the manifold gasket must be shot on the manifold. usually when the gasket goes bad it puts oil into the coolant, as far as the guage not working. it must be the thermostat is bad, it probably went bad because of the manifold gasket. I have a 3.1 and the gasket went bad, so I changed it and the thermostat at the time I had it torn down. check to see if the coolant has oil in it. the best thing to do is go to any auto parts store and buy a haynes manual for your specific vehicle, this is based on a complete teardown of vehicle, the book will describe the procedure to change manifold gasket. but if you change the gasket do not forget to replace thermostat and coolant when done. best of luck Toolman,

Dec 08, 2009 | 2002 Chevrolet Malibu

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