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  • #16
    How high is your water temp gauge getting?

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    • #17
      it didnt really overheat today. it got around 220. but the oil temp seemed really hot.
      93 black trans am (under construction)
      cheap gas

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      • #18
        oil pressure seems a little low. its fine when i start the car up but after it sits there a while it seems to drop. im getting pretty scared now. i also hear a noise every so often coming from what apears to be the intake manifold or the passenger side head. its not a constant noise just every so often and it sounds kind of like a belt whinning????? ive never heard this sound coming from the inside of a motor before. could the cause of these problems be related to a bad valve or spring or something as long as its not the motor??please?????
        93 black trans am (under construction)
        cheap gas

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        • #19
          maybe this will help. i took my valve cover off and noticed that all of my rockers were oiling except one. also the noise im hearing is coming from under the intake manifold right by that rocker. could it be a bad lifter or something like that?
          93 black trans am (under construction)
          cheap gas

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          • #20
            sorry for so many posts on my own thread right in a row. but i keep finding out information and im just looking for confirmation. if a lifter is collapsed, oil wont get to the rocker. correct? if its on the exhaust valve that would cause rising exhaust temps. correct?
            93 black trans am (under construction)
            cheap gas

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            • #21
              If your exhaust lifter is collapsed then you'll hear a rapid fire popping in the intake. Each time the intake opens. Exhaust press would be going up the intake. I would think that this would actually lower exhaust temps as hot exhaust isn't flowing into your exhaust manifold, its going in the intake instead.

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              • #22
                Originally posted by Detroit_Bird
                If your exhaust lifter is collapsed then you'll hear a rapid fire popping in the intake. Each time the intake opens. Exhaust press would be going up the intake. I would think that this would actually lower exhaust temps as hot exhaust isn't flowing into your exhaust manifold, its going in the intake instead.
                after further inspection i realized that its the intake valve that has the bad lifter. does that help any?
                93 black trans am (under construction)
                cheap gas

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                • #23
                  The collapsed lifter would explain why your car would have a drop in power - it would sound like a misfire- but it should be noticable all the time. And this wouldn't cause the car to overheat. This might sound dumb, but have you checked oil level? your lifter might be pumping upwhen its cold then getting starved as oil circulates through the motor. A dying oil pump may cause this also- get a mechanical gauge to check the press since you said youre already seeing low readings.

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                  • #24
                    If it were my car I wouldn't run it that hot to many times, or at all as it may fry a head gasket. Then you will have problems.

                    Eric W.

                    89 Firebird Formula WS6
                    Accel/Lingenfelter Super Ram
                    6.2L/382.97 ci
                    Custom PROM Dyno tuned
                    WCT-5 speed
                    BW 9-bolt Posi 3.45
                    Boss MS 18" Rims
                    Headman Headers 1 5/8 Ceramic Coated
                    Custom Dual exhaust
                    1LE upgrade
                    Custom Temperature / Navigation Rear View Mirror
                    In a constant state of upgrade!

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                    • #25
                      Originally posted by 93blackta
                      it didnt really overheat today. it got around 220. but the oil temp seemed really hot.
                      How were you measuring oil temps? 220 is actually abnormally hot for coolant temps. It sounds like to me you have a combination of problems. Waterpump going south? Oil pump going south? Bad lifter? Bent pushrod? Clogged exhaust manifold?

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                      • #26
                        Originally posted by fastTA
                        How were you measuring oil temps? 220 is actually abnormally hot for coolant temps. It sounds like to me you have a combination of problems. Waterpump going south? Oil pump going south? Bad lifter? Bent pushrod? Clogged exhaust manifold?
                        i ran the car today. i unbolted the manifold from the head and checked it the best i could. i didnt have an extention long enough to take the manifold completely off. the manifold seemed to check out ok. i put the valve cover,manifold and alternator back on and took it for another test drive. i left the egr plug out of the manifold just in case there was a blockage somewhere in my exhaust and i figured it should run better seeing as the exhaust had somewhere to go now. i sarted the car and it idled fine. i headed through my neighborhood and still noticed a serious lack of power. water temps seemed to rise and level off normally now.i definately know i have atleast one bad lifter. also again i noticed the my oil pressure seemed great to start with but after idling a while in the driveway it got lower and lower???? could a valve not opening cause a lean condition somehow?

                        thanks in advance. you guys have been great so far.
                        93 black trans am (under construction)
                        cheap gas

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                        • #27
                          how low soes the oil pressure go? As the oil warms up, it will naturally go down in pressure.
                          Dave M
                          Life, liberty, and the pursuit of all who threaten it!


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                          • #28
                            unusually low. the chek engine light comes on its so low.
                            93 black trans am (under construction)
                            cheap gas

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                            • #29
                              Originally posted by 93blackta
                              unusually low. the chek engine light comes on its so low.
                              With 200K on it I wouldnt wast too much time or money on it before I just rebuilt it. You are living on borrowed time the way it is.

                              It sounds like the oil pressure is shot. It has at least one lifer problem, I'm sure the heads are worn too.

                              Can you run a compression test? I'd at least do that before puting another dime into it. It might just be time to "poke a fork in it".
                              Tracy
                              2002 C5 M6 Convertible
                              1994 Z28 M6 Convertible
                              Current Mods:
                              SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

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                              • #30
                                Sounds to me like a compression and leakdown test is in order.

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