2005 Chevy Equinox 3.4L engine, I notice the head gasket set has 2 bolts that are different than the rest. Any idea where these 2 different head bolts go?

Yes, all oil pans need gaskets. The torque is 18 ft lbs. PDF file

Oil Pan Replacement - ChevroletForum

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2005 Chevrolet EQUINOX. Submodel: LT ' Engine Type: V6 ' Liters: 3.4. Fuel Delivery: FI ' Fuel: GAS. Oil Pan Replacement. Tools Required. J 39505 Torque ...


Do you need to torque oil pan bolts?
Engine oil pan bolts range in torque from seven foot-pounds to 22 ft-lb or more for large engines with heavier pans and bolts. Once you've torqued the bolts and filled the engine with oil, you should run the engine for five minutes to bring it up to normal operating temperature.

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It is important to remember that the cylinder head bolts used for these engines should be replaced any time the heads are re-installed. Failure to replace the bolts during head installation may reduce clamping force and head gasket service life.
To install new head bolts on these engines, use a torque angle tool and:

1. Thoroughly clean the threads in the block using a 7/16-14 tap.
2. Install the head gasket with the arrow pointing to the front of the engine.
3. Install the new cylinder head bolts dry.

Notice: This bolt is designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. If the correct bolt is not used, the parts will not be tightened correctly and the engine may be damaged.
Step 1: Tighten all bolts in sequence (see Figure 1) to 35-37 ft.lbs. (49-50 Nm).
Step 2: Rotate each bolt 130 degrees

First, without a picture to guide, orientation of the bolt torque pattern. Looking back toward the engine from the front; Forward refers to the bolt position toward the front of the car / aft is toward the cars rear:

1st bolt is forward, 3rd from the left
2nd is aft, 3rd from left
3rd is forward, 2nd from left
4th is aft, 2nd from left
5th is forward, 1st on the right
6th is aft, 1st on right
7th is forward, 1st on left
8th is aft, 1st on the left

The following is from the GM 2005 Chevy Equinox service manual;

Notice
Maximum gasket performance is achieved when using new fasteners, which contain a thread locking patch. If the fasteners are not replaced, a thread locking chemical must be applied to the fastener threads. Failure to replace the fasteners or use thread locking chemical MAY reduce gasket sealing capability.

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 to avoid damage to fasteners and systems.

IMPORTANT: All lower intake manifold bolts need to be cleaned, free of any foreign material, and reused - only if new bolts are unavailable. Use GM P/N 12345382 (Canadian P/N 10953489) or equivalent and apply to the old intake manifold bolt threads.

IMPORTANT: Manufacturer recommends the center bolts be fully torqued before the diagonal bolts to assure proper seal ability.

IMPORTANT: Lower intake manifold bolts in positions 6 and 7 should be torqued to specification using a crows foot type tool.

Install the lower intake manifold bolts.
a. Tighten the lower intake manifold bolts (1, 2, 3, 4) in sequence to 7 N-m (62 lb in) on the first pass.
b. Tighten the lower intake manifold bolts (5, 6, 7, 8) in sequence to 13 N-m (115 lb in) on the first pass.
c. Tighten the lower intake manifold bolts (1, 2, 3, 4) in sequence to 13 N-m (115 lb in) on the final pass.
d. Tighten the lower intake manifold bolts (5, 6, 7, 8) in sequence to 25 N-m (18 lb ft) on the final pass.

Rod Caps - Tighten in two (2) Steps: 15FtLbs; +75 degrees of bolt head rotation. New bolts should be installed as these are one time use "Torque to yield"

Check if the cooling fluid is "evaporating" very fast, because the head gasket can be blown. Needs a repair very soon. Better don't let the engine run any longer.

If you have an internal leak in that location the coolant will be most likely escaping via a crack in the cylinder head. You should check more closely to see if it is actually escaping via the cylinder head gasket between the head and engine block.

Most likley you will now have coolant escaping into the lubrication system so check your engine oil for coolant contamination.

No that is an acceptable loss of clearance, it will be absorbed by the hydraulic followers.

Most transmission pans do not have a drain plug. To drain the transmission the velicle will have to be raised. I usually set a large drain pan-several quarts in size-under a rear corner of the transmission pan. I loosen about three bolts on the corner so the transmission fluid will drain. When drained, I remove the rest of the bolts-all 32 or more of them. With the pan off check the color of the fluid look for burnt looking fluid. See if the fluid smells burnt. If so you may have other transmission problems. Look for metal pieces in the transmission pan another indicator of other problems. Clean all the old gasket from the pan and transmission housing-be careful not to gouge either the pan or housing. I use my finger or thumbnail if possible. Gouging either of these places will cause leaks. If you're going to replace the screen do so now. Place the new pan gasket on the pan. Check with the manufacturer's specs before using any permatex or other silicones to hold the pan gasket. I always slide a bolt or two through the pan and gasket holes, lift the pan, and start the bolts. Go slow. Make sure each bolt is going through the gasket hole before tightening it to the transmission housing. Replace the bolts and tighten to a snug using a criss-cross pattern. Go back and forth across the pan tightening each bolt a few turns until all are tight. Don't overtighten the bolts. Doing so will damage the pan gasket, When all bolts are tight, refill the transmisson slowly checking for leaks. Fill the transmission to manufacturer's specifications.

sounds like you have a blown head gasket.
be sure engine is cold, open water tank be sure it is full than start car with tank open see if you see bubbles in the tank. If so possible head gasket blown.