Announcement

Collapse
No announcement yet.

Compression / Oil pressure

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    Compression / Oil pressure

    Today I had my mechanic check the compression on all cylinders on my '91.

    All eight were at 160 lbs. No leak down at all... They all held pressure, we let the gauge sit on each cylinder for 5 minutes...

    Then we checked the oil pressure, as I only have an idiot light... (I have the gauges installed, just heven't hooked up the oil pressure gauge yet.)
    55 PSI at idle
    50 PSI in gear

    I am not going to put a motor in it right now, as it seems that everything, other than the one lifter not pumping up right away, and the valve guide seals, is fine.

    So we will be putting in new lifters, and valve guide seals... (They leak a little bit, Especially the front right first 3 cylinders) That is the only three that are still fouling just a small bit, because of the valve guide seals.
    So instead of nearly 2000 dollars for an engine, about 500 dollars will bring it up to specs!

    Not bad for almost 200,000 miles!

    Well, I'm off to the junkyard for the rest of the stuff I need to hook up cruise control on both cars.... I plan on being able to use the cruise control on the way to Chicago this year!

    Tom...


    Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
    Agent Tony DiNozzo… It only seems longer….

    http://www.tomspolicecars.com/
    Tags: None
    #2
    Sweet!! Plenty-O-Life left.
    Chris - A 20th Century Man \m/ ^.^ \m/

    Comment

      #3
      Is that 50 psi with the engine at operating temperature? If it is, hell that things like brand new.
      86 Lincoln Town Car (Galactica).
      5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

      91 Lincoln Mark VII LSC grandpa spec white and cranberry

      1984 Lincoln Continental TurboDiesel - rolls coal

      Originally posted by phayzer5
      I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

      Comment

        #4
        I was gonna say, that's pretty damn impressive
        Originally posted by gadget73
        There is nothing more permanent than a temporary fix.
        91 Mercury CP, Lopo 302, AOD, 3.08LSD. 3g upgrade, Moog wagon coils up front, cc819s in the back. KYB GR-2 police shocks. Energy suspension control arm bushings. Smog deleted.
        93 F-150 XLT, 302, ZF 5-spd from 1-ton, 4wd.
        Daily--07 Civic Coupe. Bone stock with 25k miles
        Wife--14 Subaru Outback. 6-speed.
        95 Subaru Legacy Wagon--red--STOLEN 1/6/13

        Comment

          #5
          sounds like my motor mine's at about 55 in gear cold
          and about 45 in gear hot
          I got 190 k on my lopo now

          1989 mercury grand marquis gs / 2014 ford focus s daily driver
          302 lopo with ho upper/ aod with trans go shift kit
          k code 3:55 posi rear/big brake swap tow package car

          Comment

            #6
            That was slightly warm, it had been sitting for about 30-45 minutes, while we did the compression check, (of course it was being started and run everytime we did a new cylinder)

            Anyone know what the factory specs for the compression was for the 5.0.'s?
            Just curious....

            Another thing is, since we put new plugs in it while we did the compression check... It is running great... All sorts of power I didn't have before the distributor change out... (it had alot of end play on the shaft, and the screws for the module had corroded in two)

            I actually accelerated and got on the interstate today with out having to kick it into passing gear, and out ran a truck to get into the lane...
            Last edited by trwp72; 04-10-2009, 07:17 AM.


            Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
            Agent Tony DiNozzo… It only seems longer….

            http://www.tomspolicecars.com/

            Comment

              #7
              factory spec is 40-60 psi, engine hot at 2000 rpm. No idle spec is given. If you're doing that pressure at idle, you have no worries.
              86 Lincoln Town Car (Galactica).
              5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

              91 Lincoln Mark VII LSC grandpa spec white and cranberry

              1984 Lincoln Continental TurboDiesel - rolls coal

              Originally posted by phayzer5
              I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

              Comment

                #8
                factory spec is 40-60 psi, engine hot at 2000 rpm. No idle spec is given. If you're doing that pressure at idle, you have no worries.
                OK, thanks... Now, anyone know what the factory specs for the compression would be? I'm just curious....


                Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
                Agent Tony DiNozzo… It only seems longer….

                http://www.tomspolicecars.com/

                Comment

                  #9
                  I couldn't find a cranking compression figure in my 85 powertrain book. 160 is pretty excellent though, especially if all were +/- 10 psi. my freshly rebuilt motor does 175psi if that gives you any comparison.
                  86 Lincoln Town Car (Galactica).
                  5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                  91 Lincoln Mark VII LSC grandpa spec white and cranberry

                  1984 Lincoln Continental TurboDiesel - rolls coal

                  Originally posted by phayzer5
                  I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                  Comment

                    #10
                    Originally posted by trwp72 View Post
                    55 PSI at idle
                    50 PSI in gear
                    That is a lot better than any of my 302's ever did, even with half the mileage. What are you running for oil?
                    2003 Lincoln Navigator
                    2001 Grand Marquis
                    1985 Camaro, 12.52 @ 114 MPH

                    Comment

                      #11
                      I couldn't find a cranking compression figure in my 85 powertrain book. 160 is pretty excellent though, especially if all were +/- 10 psi. my freshly rebuilt motor does 175psi if that gives you any comparison.
                      The cylinders were all excactly 160.. So I am happy with the numbers we got....



                      That is a lot better than any of my 302's ever did, even with half the mileage. What are you running for oil?
                      Advance Auto Parts oil, made by Havoline... 10W-40 I change the oil EVERY 2500 miles, with out fail. I guess that has helped with keeping it pretty fresh....
                      The Police cars have a high volume, high pressure pump usually tho....
                      Last edited by trwp72; 04-12-2009, 01:56 PM.


                      Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
                      Agent Tony DiNozzo… It only seems longer….

                      http://www.tomspolicecars.com/

                      Comment

                        #12
                        Its the regular changes that do it. my Mark VII has been changed every 3k since new, and the inside of that motor looks like new at 227k. never checked the oil pressure, but I don't doubt its fine.
                        86 Lincoln Town Car (Galactica).
                        5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                        91 Lincoln Mark VII LSC grandpa spec white and cranberry

                        1984 Lincoln Continental TurboDiesel - rolls coal

                        Originally posted by phayzer5
                        I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                        Comment

                        Previous template Next
                        Working...
                        X