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Thread: Block coolant passages plugged - pull the head?

  1. #21
    Great Pumpkin TR3driver's Avatar
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    Re: Block coolant passages plugged - pull the head?

    Quote Originally Posted by jfarris View Post
    If you have to remove the #4 liner get ready for about a half cup of small rock and sand-like material to drop on the #4 rod journal of the crankshaft.
    Not just #4, but all of them! What i do is wrap a clean shop rag around each journal, and hold it with a twist of wire while you clean out the water jacket.
    After the liners ate in place, turn the crank so the journal is at the bottom before you remove the rag n wire. That leaves the oil drilling facing down so nothing can fall into it, while you clean up the area with another rag n solvent.

  2. #22
    Yoda CJD's Avatar
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    Re: Block coolant passages plugged - pull the head?

    Still cringing.
    John

    Most of a 1955 TR2

  3. #23

    Re: Block coolant passages plugged - pull the head?

    Thanks all! Well, today was measurements and checking. The pushrods are still the 5/16", so I will replace those. The exhausts are still the larger stems. They look OK, so I decided t let my machinist make the call on replacement. I have given him quite a few jobs and he does stellar work. I will take the head up tomorrow and will be able to order the remainder of the parts once he does a look-see. I have started on the block and will do scraping/chiseling with vacuum clean-out, leaving the sleeves alone. Should be done by week's end, hope to put back together late next week.

    Cheers, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


  4. #24
    Yoda CJD's Avatar
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    Re: Block coolant passages plugged - pull the head?

    Scraping and vacuuming sounds much more prudent to me vs. power spraying. I approve and can stop cringing!
    John

    Most of a 1955 TR2

  5. #25

    Re: Block coolant passages plugged - pull the head?

    Yeah, the power washer is down and awaiting a new carb anyway! For rinsing I will use a dingus I have used before - a length of 1/4" copper tubing with the end flattened to a nozzle. Hook it to a hose and you get a strong stream that gets the loose stuff without it being ginormous pressure like a power washer. Although it was fun using the power washer on my Buick straight 8!

    Cheers, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


  6. #26

    Re: Block coolant passages plugged - pull the head?

    sp53: Dave you are probably going to do it anyway, but I thought I would mention to have your rocker shaft redone.

    So when ordering parts I included a new rocker shaft, as well as the lock pins. Having worked on my Buick rocker, I assume it's about the same? Are the stanchions pressed onto the shaft? With the Buick you just heat them a bit to loosen. Is it the same on the TR?

    Thanks, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


  7. #27
    Great Pumpkin TR3driver's Avatar
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    Re: Block coolant passages plugged - pull the head?

    If the shaft is worn, then so are the bushings in the rockers and the rocker tips. IMO its better to send the whole thing off to Rocker Arm Specialists (or whatever they are called these days). They rebuilt.mine for about what the bushings and shaft would have cost me. Shaft and rockers appeared brand new, only the pedestals and end caps were clearly the originals. And the result has held up well for a long time now.

    But yeah, the pedestals usually come off pretty easy, once you get the locating screw out. A little heat will help loosen them, but mine came off cold.

  8. #28

    Re: Block coolant passages plugged - pull the head?

    OK, today was Block Descunge Day. Got it all out. Turns out the muck was semisolid so was able to scrape and blast it out with air and house pressure hose.

    Before:
    20170731_174338.jpg
    You can see the muck behind #4 comes up to about 3/4" below the top of the block. All passages to cyl #3 blocked.

    After:
    20170808_180522.jpg
    You can see down to the bottom now. The water now flows completely around all the sleeves and out the block drain. Full open passages to the block front. Big change from before! Extracted about a pound of muck, both into the shop vac and all over the engine compartment! My assistant Ben said we just should've taken it thru a water park! Got it all cleaned up and will change the oil before firing. Now waiting for my machinist on the head.

    Cheers, Dave

    Cheers, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


  9. #29
    Yoda Geo Hahn's Avatar
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    Re: Block coolant passages plugged - pull the head?

    Quote Originally Posted by Daves1957TR-3 View Post
    ...After:
    20170808_180522.jpg

    ...Got it all cleaned up and will change the oil before firing.
    Opinions may differ, but I like to clean the top of the pistons when I have it to this point.

  10. #30
    Jedi Warrior
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    Re: Block coolant passages plugged - pull the head?

    Hello Dave

    Good job on getting all the crud out of the block.

    I presume that is a disc of some type I see sitting on the piston.

    David

  11. #31

    Re: Block coolant passages plugged - pull the head?

    David - disc is washer used to keep the sleeves in place.

    George - suggestions on cleaning method?

    Cheers, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


  12. #32
    Jedi Warrior
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    Re: Block coolant passages plugged - pull the head?

    Hello Dave

    I was referring to the top of the piston in your before and after photos. There appears to be a raised portion almost piston diameter but off set to the center of the bore.

    David

  13. #33

    Re: Block coolant passages plugged - pull the head?

    Oh I see. It's just discoloration of some sort, or a shadow from the flash. I will take another look this weekend.

    Cheers, Dave
    Dave Stovall

    1957 TR-3 TS214XX
    1940 Buick Super Coupe 56S


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