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Loose flange gasket - Cars & Trucks

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Replace gasket and tighten

Posted on Feb 12, 2012


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How do I replace valve cover gaskets?

What type of engine v8 or v6? There are no gaskets on the valve cover . A silicone sealant is applied in a bead around the cover flange allowed to slightly cure and evenly bolted down to the head. If you do this be certain to remove all old sealant from the flange. Clean the flange but do not scrape or bend. You must get the proper high temperature "make a gasket "sealant especially made for valve cover gaskets. Follow the directions exactly

Jun 05, 2015 | 1995 Pontiac Firebird

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2004 volkswagon passat coolant flange leaks

it could be rusted and pitted gasket bad loose bolts

Dec 05, 2013 | Cars & Trucks

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A loud puffing noise coming from my engine?

Check for a loose plug first The combustion gases escaping from under the plug seal. Check for a loose or blown mainfold gasket or broken exhaust flange

Feb 21, 2013 | 1999 Ford Crown Victoria

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How to replace the thermostat in a 04 lancer

the thermostat is on the rear of the cylinder head above the gear box and is connected with the upper radiator hose. Drain the radiator coolant by loosing on the low part of the radiator the plastic butterfly drain plug, and let the coolant in an empty bowl. Then by using a 12mm socket loose the bolts on the thermostat flange and remove it.When the thermostat housing removed you will see the old thermostat,pull it out and clean the old gasket Renew the thermostat and use a new gasket,put the flange back on and tight it, Fit the radiator hose and tight the jubilee clip. Then loose the 12mm bleeding bolt which is on the thermostat housing,start filling the radiator with a new coolant until the air comes out of the bleeder and close it. then start the engine and let it in idle with radiator without the cap. When temperature raised to some warm point put the radiator cap and leave it idle till fan starts.Then switch engine off and let it cool down and check the radiator coolant level and the expansion tank fill it to maximum level.

Nov 12, 2012 | 2004 Mitsubishi Lancer

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I have an 1998 Chevy Blazer and need to change the catalytic converter, are the flange bolts welded and can i cut them

Catalytic Converter Removal & Installation 2.2L Engine To Remove:
Catalytic converter 2.2L engine gm-03-22-734.gif

  1. Raise and safely support the vehicle.
  2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  3. Remove the exhaust manifold pipe flange mounting nuts from the catalytic converter.
  4. Remove the catalytic converter flange mounting nuts from the muffler.
  5. Remove the catalytic converter from the muffler.
  6. Remove the catalytic converter from the rear hanger bracket insulator.
  7. Remove the catalytic converter.
  8. Remove the (HO2S) from the catalytic converter.
To Install:
  1. Install the (HO2S) to the catalytic converter.
  2. Install a new gasket and the catalytic converter to the muffler.
  3. Install catalytic converter to the catalytic converter hanger.
  4. Install the catalytic converter flange mounting nuts to the muffler flange.
    • Tighten to 26 ft lbs (35 Nm).
  5. Install the catalytic converter flange mounting nuts to the exhaust manifold pipe flange.
    • Tighten to 26 ft lbs (35 Nm).
  6. Connect the heated oxygen sensor (HO2S) electrical connector.
  7. Lower the vehicle.
------ Catalytic Converter Removal & Installation 4.3L Engine To Remove:
  1. Raise and safely support the vehicle.
  2. Raise and support the transmission.
  3. Remove the transmission support
  4. Disconnect the left and right pre-converter heated oxygen sensor (HO2S) electrical connector.
  5. Disconnect the post-converter (HO2S) connector. Muffler flange and gasket gm-03-43-731.gif

  6. Remove the catalytic converter flange mounting nuts from the muffler.
  7. Remove the catalytic converter from the muffler.
  8. Remove the exhaust manifold flange mounting nuts from the catalytic converter. Catalytic converter 4.3L engine gm-03-43-735.gif

  9. Remove the catalytic converter from the support bracket insulator.
  10. Remove the catalytic converter and gaskets.
  11. Remove the heated oxygen sensor.
To Install:
  1. Install the heated oxygen sensors as needed.
  2. Install a new gasket and the Install the catalytic converter to the support bracket insulator.
  3. Install the catalytic converter to the exhaust manifold flange. Install the mounting nuts.
    • Tighten to 39 ft lbs (53 Nm).
  4. Using a new flange gasket, install the catalytic converter to the muffler. Install the mounting nuts.
    • Tighten to 30 ft lbs (40 Nm).
  5. Connect the left and right pre-converter heated oxygen sensor (HO2S) electrical connectors.
  6. Connect the post-converter (HO2S) electrical connector.
  7. Install the transmission support.
  8. Lower the transmission.
  9. Lower the vehicle.
prev.gif next.gif ---
It looks like you can cut them and replace them with new bolts and nuts.prev.gif next.gif

Sep 05, 2010 | 1998 Chevrolet Blazer

1 Answer

Thermostat housing leaksput sealer new thermstat main housing lea

Simple fix..... Just need to replace the gasket. Go to your local auto parts store and get a new gasket for your year, make, and model of car. Should only be $5 -$8 for the gasket. Take the housing apart, 4 -1/4" bolts, I believe, take them all the way out. Take the housing off, but be careful not to lose the thermostat, as it just sits in there loosely. (You will also lose some fluid from the radiator, so you may want to place a catch-pan underneath the car where the antifreeze will spill). Next, you will have to scrape the old gasket off both sides of the flange using an old putty knife, razor-blade scraper, or even sandpaper. Then just fit the new gasket in so that the bolt holes line up, and bolt the flange back in place. Don't over-tighten the bolts due to they are under quite a bit of heat and pressure and you don't want them to rupture. Good luck.

Jul 19, 2010 | 2001 Ford Focus

1 Answer

Oil leak

nstalling the Oil Pan
  • Make sure the sealing surface of the pan's rim is flat and capable of providing a seal before reinstalling it.
  • Check the flanges of a steel oil pan for warpage.
  • Use a straightedge or lay the pan, flange side down, on a flat surface with a flashlight underneath it to spot uneven edges.
f13-29.jpg Checking the flatness of an oil pan flange. Used with permission of Detroit Gasket - Copyright 1999.
  • Carefully check the flange around bolt holes. Minor distortions can be corrected with a hammer and block of wood.
  • If the flanges are too bent to be repaired in this manner, the pan should be replaced.
Once it has been determined that the flanges are flat, install the oil pan with a new gasket.
  • Tighten the screws evenly. Do not tighten any of the screws all of the way until all of the screws are started in their threads.
  • Use an inch-pound torque wrench to torque the screws to specifications.
  • Look this up in the service manual. Specifications usually range from 60 to 150 inch-pounds. This is not very much, but it compresses the gasket and allows it to work properly.

May 22, 2010 | 2006 Chevrolet Impala

1 Answer

Oil and Coolant leak of about 11/2 quarts coolant - 1/2 quart oil per night Leak 1 (Coolant) Appears to be coming from the radiator bottom right corner. Leak 2 (oil) Appears to be coming from the engine...

The passenger right side of the car doesn't have any flanges for cooling system, if that's correct then your radiator has a leak or puncture.

The driver side of vehicle has both the in and out flanges for the radiator. Very common to see leak at the drain valve leaking (not closed tightly). In the same area would be bottom flange of radiator which the composite flange is degrading and causing the leak.

The middle part of the bottom engine compartment is where your oil/coolant cooler assembly just above the oil filter. A loose oil filter could be the cause 95% of the time and 5% would be a bad o-ring from the oil cooler to the oil filter flange.

Dec 16, 2009 | 2000 Volkswagen Beetle

1 Answer

How do I replace the oil pan gasket on a 2001 GMC Yukon XL?

Changing the oil pan gasket on a GMC Yukon XL is realtively simple, but does require removal of the exhaust pipe. You will need a new oil pan gasket and a new exhaust pipe flange gasket.
Put the car on ramps or jacks to access the undercarriage.
Remove the exhaust pipe by removing the 3 nuts holding the exhaust pipe flange to the exhaust manifold. These nuts often rust and prior application of penetrating oil may be required to remove them without damage. Once the pipe is unbolted, work the exhaust system loose from the hanging brackets. In most cases the entire system does not have to be removed since there is enough room to remove the pan with only the front hangers removed.
Drain the oil from the engine
Remove the 10 mm bolts holding the pan to the block.
Remove the old gasket material and scrape any remaining gasket from the block and pan.
Install the new gasket. Forma-Gasket or a similar product may be used in small quantities to "glue" the new gasket in place and prevent shifting while the pan is reattached to the block.
Reinsall the 10 mm bolts in a cross pattern to ensure the gasket is compressed evenly. Do not overtighten the bolts.
Replace the pipe to flange gasket between the exhaust pipe and the exhaust manifold with a new part.
Reattach the exhuast pipe to the hangers.
Install the 3 bolts connecting the pipe flange to the exhaust manifold.
Fill the engine with oil.

Sep 15, 2009 | 2001 GMC Yukon

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