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  1. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    OK, I have a final update on this issue I was having. It was the distributor modulator (when I changed over to the Sierra electrical distributor package) the Chinese modulator was bad. So I ordered a S10 version from AC Delco(no brass screw holes but coated it good & I live in the desert) and...
  2. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    I have the tab but the tape is a good idea since I have 4 different marks on my wheel, seems like every shop had their own idea on timing. 1 mark is mine from when the heads were off so I know it's 100% TDC and I can adjust from there. I also have the extras for the distributor too, see pic...
  3. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    Thanks, I ended up replacing the lifters anyways since I was 1/2 way there. Just waiting on the new gasket to deliver to put the intake back on. I did buy an old Sears timing light & rpm gauge so I can test it on the lake and make adjustments. I guess that makes sense since I was thinking I...
  4. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    Before last year the boat ran great since 1998 (that's when the 1995 heads were changed) and the push rods and lifters I didn't change & they all seemed to be the same size. Last night I was pushing on all the rods and no movement but I just cracked it up to be that if one was going I might not...
  5. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    This is the pic from putting on the heads after remanufacture. This is a 1990 everything except the heads are 1995 (old winterizing lesson) & before now boat shops have done all the work. I'm starting to think I might have a bad lifter and it's supposed to be done with the 1995 method of...
  6. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    My nuts don't have a indent. Pic is a couple top & bottom. Would replacing these nuts be a better option?
  7. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    ok, I got it all done and she sounded good. With the earmuffs on but about 5 min in I started hearing a ticking with the rockers and it got louder. I just took off the valve covers and a couple nuts backed off a couple threads. Should I use the white thread sealer on the nuts to get them to...
  8. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    Thank you! Working on her right now.
  9. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    OK, I finally had some time to work on the old boat again and I starter her up with earmuffs and the heard some slight ticking. I also noticed I have the plastic lifter brace so I tried the 1995 method and with ear muffs she sounded great so I took her out to the lake and did a couple 500 yard...
  10. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    The rockers are non roller style. I have the engine buttoned up and just sitting right now, haven't even fired it up due to work and kids. I follow the lash technique in the manual but with 2nd guessing myself I'm going to do a compression test to see if they are too tight, before firing it up...
  11. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    Thanks all! I'm mechanical but never torn apart a boat or car engine & the rockers was the part I just felt unsure. I ended up doing 0 lash and a full turn but the full turn didn't always happen as the nut stopped/bottomed out. So then I went back and did 20#'s on each one since I remembering...
  12. 1

    1990 4.3 block and 1995 heads, which rocker tightening specs to follow?

    This is the 1st head project I've done, or even tore down the engine this far. The boat has a 4.3 from 1990 but the heads are from 1995 (forgot to winterize in a non-cold state & had a shop replace the heads in 1997). Forward to 2023. I just got my heads back from the machine shop and I have...
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