Head Gaskets and Valve Covers

Take the valve cover off and scrap the gasket off with a razor. Be carful not to put any gouges in the on either side.

3.0 V6

It means that the head gasket (which is the seal between the engine block and the head(s)) has failed. This often happens as the result of a rough running engine putting a lot of stress on the gasket, or simply from old age. This failure tends to present itself as a sudden and occasionally violent breaking of the afore mentioned seal thus giving it the term "blown".

Drain the coolant, remove the six nuts on top of the head. Remove the head and take off the old gasket. Clean both surfaces and put the new gasket on. Put the head on and tighten the nuts down in a crisscross pattern. I think they get torqued to eighteen pounds.

How many bolts are on the 454 1984 chevy

18 ft. lb. From owners manual of 1981 YZ 465 H.

1 1/16

i need the torque sequence for a 1998 pontiac grand am 2.4 quad

With heads off, take them to a good machine shop and have them clean and magna-fluxed. For aluminum heads, have them pressure test the head. If not cracked, have heads surfaced and put together with new gaskets and sometimes new head bolts, depending on the type of head

water coming from the exhaust pipe or water in the oil.check dip stick for this.

They are an older style of gasket. Mainly found in years below 2000. Its often the OEM replacement for 90's cars.

If you are able to, go with MLS gaskets. They are far stronger and will generally last longer. But you would probably be ok with graphite gaskets.

Its called a valve cover gasket kit and the job should cost about 300.00 Parts and labor.

Headgaskets most commonly blow due to the engine becoming too hot, this may mean a blocked radiator or a water leak causing the water level in the engine to drop.

The torque specification for the spindle nut on a 2005 Toyota Sienna is typically around 181 ft-lbs (245 Nm). It's important to ensure that the spindle nut is properly torqued to maintain wheel integrity and safety. Always consult the vehicle's service manual for the most accurate and specific torque values and follow the manufacturer's guidelines.

18 - 22 ft./lbs.

For the 2009 Yamaha YFZ450R, the cylinder head bolt torque settings are typically around 22 ft-lbs (30 Nm) for the initial pass. It's important to follow a specific sequence for tightening and to perform a second pass at the same torque specification to ensure even clamping pressure. Always refer to the service manual for detailed procedures and specifications.

For the 2008 Nissan 488 Phazer, the cylinder head bolt torque specifications typically range around 70-75 ft-lbs (foot-pounds) for the final torque. It is crucial to follow the manufacturer's service manual for the correct sequence and any specific procedures, such as tightening in stages. Always ensure that the bolts are clean and that any necessary lubricant is applied as specified.

One man drove his car for 2 weeks with a broken head gasket before he blew his engine. Another drove it for 3 weeks. A head gasket costs several dollars if you can change it yourself. A new engine over a thousand. One mechanic can change a head gasket in an hour for $ 100. Other mechanics are no where near as good and take longer. It may be more in your area. How long do you want to go and how much do you want to pay?

No, not necessarily.

They should however be checked with a straight edge and feeler gauges for warping.

If found to be warped then yes they may need to be resurfaced (at a competent machine shop)

Bad coils would cause the spark not to occur, causing the fuel air mixture not to ignite, dumping raw gas out the exhaust. A small amount of raw fuel may end up in the oil, if any , by leaking past the piston rings.

If some cylinders are not firing, that would put more load on the other cylinders that are, and the engine would run rough. Excessive load on some cylinders and no load on others, over time, may cause some cylinders to run hotter, others cooler... Plus extra pressure inside the cylinders running at full throttle...

Additional factors might come into play, such as the coolant running low one day, indeed, this may be enough to create a leak in the head gasket.

However, the above is only a theoretical argument. I personally have experienced a blow in a head gasket, in an old saab, it blew during a period of hard acceleration.

The lifters have some pretty tight tolerances to make them work.

Some have a snap ring on top of the plunger. Take them apart ONE AT A TIME and wash with solvent.

If they have no snap ring, try running carb cleaner through the hole in the side and out the top.

Some lifters are not too expensive (about $10/apiece) so you might think about replacing them.

Others are not too hard to change, so you might get by putting them back in and changing the noisy ones if you have to.

If they're just full of mayonaise oil, put them back in. Normal pressurized oil flow will clean them out.

If they sat too long and rusted, you should bite the bullet and replace them. I see a lot of engines with blown head gaskets that sat for awhile full of water. Some need total rebuilds due to rust and pitting of close tolerance parts, but could have been done cheaply if the rust had not started. The water/antifreeze by itself is not really the issue.

You can keep driving the vehicle if you want to destroy the engine. The more you run the engine the more damage will be done. Coolant mixing with the oil will cause severe engine wear.