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Re: what is valve clearance for 97 chevy malibu v-6 3.1
I don't know of any chevy engines that run a solid lifter cam.(Which would require clearance specs) If it has either a common rail on which the rockers all are attached, or if the rockers are attached in pairs, on "bridges" Just put it together and let it fly. If each rocker is on an individual stud, common adjustment is to run the adjusting nuts down till the pushrods can be just turned with your fingers (any cam lobe that is in the "up position requires that you turn the engine by hand so you can do this with rocker "relaxed") After doing this, run the engine and slowly turn back each adjustment till it starts clacking. then turn back down till quiet, then 1/4-1/2 turn further down. Lots of oil may be spraying all over the place while doing this so take care not to start any fires. There are items available to cut down on this, but youd have to check with parts supplier to see what they have.
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Check with the auto parts store to see what the fuel sensor looks like, It should be accessible and I have seen those go on the smaller chevys like aveo.
Look up on internet replacing gas recirculation sensor on google
I have just rebuilt one for our Westerly 21. This is from my Petter 'A' range workshop manual:- The water cooled engines (AC1W etc.) are:cylinder head nuts: 30NM (22 lbft) except 32.5NM (24 lbft) for the one that also holds the rocker. Valve clearances are 0.1mm (0.004") COLDReset valve clearance after one hours running since torquing the head. Retorque head and set valve clearance after initial 20 hours running I believe Mini-6 refers to the water cooled engines but just in case, the air cooled engines are 27N (20 lbft)
the ( iac ) idle air control needs cleaned. it is mounted on throttle body to control idle speed, remove the torx screws holding it on. do not put body of valve in any liquid or it will ruin it. clean valve on end with carb, or throttle body cleaner. use a old tooth brush to clean it, or similar. this should do the trick if it is not bad!! also check wiring to it for broken wires etc. have a good day !! do not push on valve or it will mess up setting. proper setting is 1 and 1/8 from tip of valve to body of iac. hope this helps.
Most likely its just your lifters clapping as they make contact, until the oil starts flowing good through them, then it goes away. My car has been doing that for a long time. Never had any problems. The rods are pushed up by the camshaft, the rods push down rocker arms which then open the valves. The rods are round at the tips and sit in lifters that pump oil through them up to the top of the engine and then out onto the valve springs. If your car has a lot of miles you may consider putting a thicker oil, something like 10w40.
these are hydraulic valves, no adjustment needed, with both valves fully open u back them off until they (rocker arms) are just slightly loose, then tighten them 1/2 turn, follow the firing order of the engine and bring it to top dead center (compression stroke) for each cylinder.
Search for the engine model ECOTec 2.2 rather then Malibu. It is very easy to replace the plugs, they are DEEP inside the engine so you will need a 6" socket extension for the spark plug socket. Needle nose pliers were required to retrieve the socket on the first plug. Don't push down hard on the plug, just enough to engage the nut. Full screen photo sequence is available at: http://www.gaownersclub.com/forum/showthread.php?t=99068