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  1. D

    Did I Damage 94--5.7 engine???

    my-bad--brain cells going dead,lol
  2. D

    Did I Damage 94--5.7 engine???

    I dont understand why Shaffers would be bad for engine??
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    Did I Damage 94--5.7 engine???

    Well I have no knocking and oil pressure I cant say cause I run 5w-40 full synthetic schaffers in it and now all I could get was regulars 5w-30 so oil pressure is a tad lower now but I should change oil to what I use and cut open filter?
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    Did I Damage 94--5.7 engine???

    Well I put new radiator and new engine oil lines in and been ok for couple days BUT on a 60 mile trip I just pulled into a small town with one stop sign and just started to pull away and looked down to see hardly any [oil pressure]? I shut off engine and costed to a parking lot where I seen...
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    94-GMC 350 Made gas mileage Less By changes?

    No engine lights ever-- THANKs ALOT for all info--Millage did change quickly after I did all these things,,Have had truck be 2 years next month and I did put plugs--wires--new distributer in with new Icm --new fuel pump and exhaust [did not change co2 sensor?] After this it would start when...
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    94-GMC 350 Made gas mileage Less By changes?

    Well I git this truck 2 years ago and gas mileage did not seem to bad---I did do Tune-up all normal things and had put new exhaust on so knocked out Cat. then, ---Installed ele, fans set-up too---- The truck runs Great!!--good power and idles perfect cold & hot and also added another cold air...
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    Running rough when the engine warms up.

    Yes I set at zero---Can,t believe how the timing light bounce all over then like snap back in place,,,,
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    Running rough when the engine warms up.

    Been working on my truck for ten months now somewhat different than yours but along same lines,,,, Did the fuel pump---All sending units for Temps---TBI rebuilt----Idle control replaced--New distributor & plugs and ICM----BUT got to thinking about timing so put timing light on engine while was...
  9. D

    1994 5.7 K1500 ruff start for 40 seconds

    Well fixed it---Yep for anyone interested ???----I remembered when I put new wires and distubeter in this all started??????--So I put the original ICM back in and BAM!!!--starts fine and runs fine now so anyone with same problem new parts dont mean anything,,ICM was the problem all along,,
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    Looking for Electric fan swap thread.

    I put ele fan on my 1994 K1500 5.7 last spring and works Fine,, Used a NEW fan was for Ford Thunderbird has ALOT of CFM,, only about $130 for all,,I wired the relays myself and used a 210 on & 195 off for fan and wired the AC to come on when AC is used, Can explane how I wired it if you want??
  11. D

    1994 5.7 K1500 ruff start for 40 seconds

    Well another post of this ruff start [when cold] for less then minute then all day runs perfect? I did all the normal things; new fuel pump distributor & plugs IAC new EGR clean working ok New Temp sensors [BOTH] Today I found when I started it ran Fine for 20 seconds then RUFF--stumble...
  12. D

    engine oil

    Schaeffer’s Supreme 7000™ Synthetic Plus 15W-40 High zinc, multi-grade, synthetic-blend racing oil for use in high performance gasoline engines including those with flat tappet cams and those that are turbocharged or supercharged. Also make different grades of racing oil VERY GOOD Stuff!!
  13. D

    5.7--350 Over-Heat??

    Thanks for message---I drove it today seems ok???--- Your engine with that cool down and shutting off some cylinders sounds like good idea?---someone was thinking when coming up with that,,
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    5.7--350 Over-Heat??

    Well I did a stupid yesterday,, My ele fan works great and I have it so it can come on & off automatic [with sensor] or turn it on or off with switch,, So was about 50 degrees out I stopped to talk to a friend and forgot to put fan on?? Came out Gauge was in the red 260*--turn fan on cooled...
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    1994 Z-71 Cold start Runs bad 30 seconds??

    Did you put it just into the TBI unit while running??
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    1994 Z-71 Cold start Runs bad 30 seconds??

    Well all summer it starts ok now colder out and here we go again?? Might take it to local shop? I am out of ideas?
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    Synthetic Lubricants

    On my 94 Z71 I just got me a G80---I know alot people dont like them but I always had good luck with them,,, And for oil ALL schaeffer products and there RACE oil in engine for sure good for flat tappets,,
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    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    Hello--I been reading and reading and reading up on all these and am more confused than ever? I had a stock-G80 in a 2000 two wheel drive for years and it worked ok--So i found what looks like a good clean not used much on e-bay for $175 with shipping came out a 99 GMC Yukon Denali with...
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    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    Would this be ok option? A New G80 from Amazon for $279?,,,, GM 8.5" Posi Unit - 30 Spline - Chevy GMC - Eaton-Style Limited-Slip Locker NEW Would Full synthetic oil be ok in this? Or if I go with Lunch-box type would same oil be ok?? Thinking 85w-140?
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    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    heres photo of numbers;;
  21. D

    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    I,ll get a photo later today of numbers
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    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    THANKS
  23. D

    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    I took cover off when I changed the oil in the Diff, Just spiders is all in there
  24. D

    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    Can I be sure it is a 30 spline from Numbers in glove box? And will the numbers be in wwith all those other numbers there also???
  25. D

    Advice 94, Z-71, 1/2 ton Rear Diff locker install

    I have the Ten bolt Rear and for sure has No locker now----Just want to be able to put some type of locker in and know axle spline without having to take axle out??? Have to order it anyways after I see what one works best from all you guys,,

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