I have a 95 camaro and when i take off the rubber air intake hose where it connects to the intake manifold there is a trail of oil in the hose and in the opening of the manifold..... what is causing this and how do i stop it? thanks.
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All vehicles are equipped with a PCV (positive crankcase ventilation) valve that is located on top of a valve cover and connected to the intake manifold with a rubber hose. When the engine is running, there is some pressure from the combustion chambers that gets past the piston rings and into the crankcase. This is known as blowby. The PCV valve allows this pressure to be relieved and vented into the intake manifold. A thin film of oil will form in the intake manifold since the hot gases from the crankcase contain an oil vapor that cools and condenses once it is in the cooler air of the manifold.
Hi there:Removal and InstallationExcept Accord V-6
The cylinder head temperature must be below 100 degrees F (38 degrees C); allow the engine to cool several hours if the car has been recently driven. Turn the crankshaft pulley so that the number one piston is at Top Dead Center (TDC) of the compression stroke.
Disconnect the battery ground cable.
Drain the cooling system.
Remove the air cleaner and intake duct assembly.
Label and remove the brake booster, PCV and charcoal canister vacuum hoses from the intake manifold.
Remove the engine ground cable from the cylinder head or valve cover.
Relieve the fuel pressure using the proper procedure. Disconnect the fuel lines.
Disconnect the accelerator cable at the throttle body or carburetor. On automatic transaxle vehicles, also disconnect the throttle control cable.
Disconnect and tag all the wire harnesses and vacuum hoses from the cylinder head, intake manifold and throttle body/carburetor. Disconnect the spark plug wires, then position them aside.
Disconnect the upper radiator hose. Remove the heater hoses from the cylinder head.
If equipped, remove the cruise control actuator. Do not disconnect the cable; move the actuator out of the work area with the cable attached.
Remove accessory drive belts.
Disconnect the inlet hose from the power steering pump and plug the hose immediately to prevent fluid leakage. Remove the power steering pump from the cylinder head and position it aside.
When the power steering hose is disconnected, the fluid will flow out. Cover the alternator with a shop towel to prevent the fluid from leaking into it.
If the alternator is mounted to the cylinder head, remove it.
Remove the power steering and alternator brackets if they are mounted on the cylinder head.
Remove the distributor. Be sure to scribe a line relating the position of the distributor to the engine for easy installation.
If equipped, remove the cylinder sensor next to the distributor.
Remove the valve cover.
Remove the timing belt.
Do not crimp or bend the timing belt.
Remove the exhaust header pipe nuts and the header pipe bracket (if equipped). Pull the pipe away from the exhaust manifold.
If equipped, remove the EGR crossover and air suction pipes.
On Accords through 1989 and Preludes through 1991, the cylinder head can be removed with the intake and exhaust manifolds either still attached or removed. On other models, the manifolds should be removed first.
On some engines, it will be necessary to remove the camshaft holders, camshafts and rocker arms to access the cylinder head bolts. If so, refer to the proper procedures in this section.
Remove the cylinder head bolts in sequence (take notice of any bolt holes occupied by longer bolts). Failure to follow this procedure may cause the head to warp.
On 1984-89 Accords and 1984-91 Preludes, work from the ends toward the center. Loosen each bolt about 1 / 2 turn each time and make several passes to release the tension evenly.
On 1990-95 Accords and 1992-95 Preludes, follow the loosening sequence shown in the illustrations. Loosen each bolt about 1/3 turn each time. Repeat the sequence until all bolts are loosened.
Fig. 1: Bolt loosening sequence on 1990-93 Accords and 1992-95 Preludes with 2.2L engines 24. Remove the cylinder head. The head may resist removal, even with the bolts out. Tap the edge of the head with a plastic or rubber mallet; lift the head straight up to remove it.
Remove the cylinder head gasket and clean the mating surfaces.
If applicable, remove the intake and exhaust manifolds from the cylinder head.
Install a new head gasket on the engine, making certain it is positioned correctly. The cylinder head dowel pins and the oil jet must be in place. Refer to the illustrations if necessary.
Install the head. Lower it straight down onto the block, aligning it correctly.
Apply clean engine oil to the bolt threads and the contact face of the bolt head. Install the head bolts finger-tight.
On all models except 1988-89 DOHC Prelude and 1992-95 Preludes with 2.3L and VTEC engines, tighten the head bolts following sequence A. On 1988-89 DOHC Preludes, use sequence B. Use sequence C on 1992-95 Preludes with 2.3L and VTEC engines.
On 1984-89 Accords and 1984-91 Preludes, tighten the bolts in two passes. The first pass should bring the bolts to about 22 ft. lbs. (30 Nm). On the second pass, tighten the bolts to their final torque of 49 ft. lbs. (68 Nm).
On 1990-93 Accords, tighten the bolts to 29 ft. lbs. (40 Nm) on the first pass, 51 ft. lbs. (70 Nm) on the second pass, then tighten the bolts to their final torque of 78 ft. lbs. (108 Nm).
On 1994-95 Accords and 1992-95 Preludes, the bolts are also tightened in three passes. Tighten the bolts to 29 ft. lbs. (40 Nm) on the first pass, 51 ft. lbs. (70 Nm) on the second pass, then tighten the bolts to their final torque of 72 ft. lbs. (100 Nm).
Fig. Cylinder head bolt torque sequence B
Fig. Cylinder head bolt torque sequence B
Fig. Cylinder head bolt torque sequence C
If applicable, assemble the intake and exhaust manifolds to the head. Use new gaskets.
If applicable, install the cam, rockers and camshaft holders.
If equipped, install the EGR crossover and air suction pipes.
Connect the exhaust pipe to the manifold using new nuts.
Install the timing belt.
Install the valve cover.
Install the cylinder sensor (if equipped) and the distributor.
If applicable, install the alternator.
Install the power steering pump, then connect the inlet hose to the pump.
Install the accessory drive belts. Adjust the belt tensions.
Install the heater hoses.
Install the cruise control actuator if it was removed.
Connect the spark plug wires. Connect all the wire harnesses and vacuum hoses to the cylinder head, intake manifold and throttle body/carburetor.
Connect the throttle control cable and/or accelerator cable at the throttle body.
Connect the fuel lines.
Install the brake booster, PCV and charcoal canister vacuum hoses.
Install the air cleaner and intake duct.
Refill the engine coolant. It is recommended that the engine oil be changed whenever a cylinder head is removed.
Connect the negative battery cable.
Start the engine, allowing it to idle. Bleed the cooling system. Check the work area carefully for any signs of fluid leakage or any indication of the timing belt rubbing or slapping the covers
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if your rubber hoses are cracked and leaking then replace the hoses with proper size and length.
if the hoses are leaking where they connect to the metal fittings from the heater core then try and tighten up the hose clamps -- they could just be loose.
damaged PCV valve.If you follow the hose that is connected to the intake manifold and to your filter housing there will be a plastic that will be connected to the manifold.Either change this or route the hose to an oil catch can (which you will have to install)and blank off the holes on the filter manifold.
There is a heater core bypass pipe that runs from the block (under the manifold) to the bacl of theengine where you will see a flat rectangular "sheet metal" thing with a pipe coming out of it. The a rubber hose connects. You need to pull the top air plenums and intake to get to it. The p[ipe flange bolts to the block with silicone rtv as a sealant.
take the inlet hose to the heater core and connect it with the outlet hose on the heater core, thus creating a by-pass. you may be able to follow the hoses back to the aterpump and engine block and make a shorter run of it.
The PCV valve can be located in several places. The most common location is in a rubber grommet in the valve cover. It can be installed in the middle of the hose connections, as well as installed directly in the intake manifold.
Once the PCV valve is located, make sure all the PCV system hoses are properly connected and that they have no breaks or cracks.
Remove the air cleaner and inspect the air and crankcase filters. Crankcase blowby can clog these with oil. Clean or replace such filters.
Oil in the air cleaner assembly indicates that the PCV valve or hoses are plugged.
Make sure you check these and replace the valve and clean the hoses and air cleaner assembly.
When the PCV valve and hose are in satisfactory condition and there is oil in the air cleaner assembly, perform a cylinder compression test to check for worn cylinders and piston rings.