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05 Tundra motor blown compatibility

Discussion in '1st Gen Tundras (2000-2006)' started by specter208, Mar 10, 2020.

  1. Mar 16, 2020 at 10:52 AM
    #31
    Filthyphil

    Filthyphil New Member

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    Did the engine get hot?
     
  2. Mar 16, 2020 at 11:01 AM
    #32
    specter208

    specter208 [OP] New Member

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    I bought this truck used. It hasn’t overheated while I’ve owned it. The carfax shows that both the head gaskets were replaced shortly before I bought it. Was losing coolant, had a very bad timing cover oil leak and was misfiring on cold starts.
     
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  3. Mar 16, 2020 at 1:47 PM
    #33
    Filthyphil

    Filthyphil New Member

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    Oh so they fixed it but the block was F’d and now your having issues again. Damn that sucks I had never heard of the block warp issue. Always figured you could just machine it and be good to go.
     
  4. Mar 16, 2020 at 2:08 PM
    #34
    bleach

    bleach Resident WISEGUY

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    I think the block gave before the head because of the block's structure. There's not much meat on the block compared to the heads.
     
  5. Mar 16, 2020 at 2:20 PM
    #35
    specter208

    specter208 [OP] New Member

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    Modern engines come with VVT which is more sensitive to changes in angle and distance of the cams. I’m sure old 22res could be resurfaced a couple times and no problems because all you need to do is tighten up the slack in the timing chain/belt
     
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  6. Mar 20, 2020 at 12:37 PM
    #36
    specter208

    specter208 [OP] New Member

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    Hi guys. I have a question. Whenever I checked the coolant, the radiator was always full but the expansion tank was losing coolant very slowly. My expansion tank got super low and I saw it sipping the last few table spoons of coolant Before I opened up the motor. I forgot to mention this earlier, the timing marks on the the cams looked retarded about 1/2 a tooth. My issues were that engine would misfire mostly in the morning on a cold idle but also at low speeds or when the vehicle is stopped. Acceleration also felt sluggish but would feel better if I unplugged the battery and reset the computer. The chain tensioner had little rings to suggest there was some slack in the chain and the sprockets.

    E1C9EF1C-64FE-4AAD-90C7-7B6BB5CFCB2C.jpg
    6A13E054-AEEB-444D-BF7F-461FE4112014.jpg
    DEC3DDFB-F07E-4A1B-B76C-6FA933009B78.jpg
     
  7. Mar 20, 2020 at 12:48 PM
    #37
    empty_lord

    empty_lord New Member

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    sounds like a blown head gasket to me. the little rings on the tensioner are normal.. they ratchet out, if the rings were way out on the travel of the tensioner then you had a stretched chain. Theres been a few 03-06 4.0s coming in the past few years with head gasket issues that had the same symptoms youve got
     
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  8. Mar 20, 2020 at 12:56 PM
    #38
    specter208

    specter208 [OP] New Member

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    My original hot compression test numbers were as follows:

    #1 - 175psi
    #3 - 160psi
    #5 - 165psi

    #2 - 165psi
    #4 - 160psi
    #6 - 165psi

    I kind of wish I could have done a leak down and exhaust gas test.
     
  9. Mar 20, 2020 at 2:39 PM
    #39
    empty_lord

    empty_lord New Member

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    No
    not bad numbers. But the cold misfire is lean towards doing a cold leak down test. Most of the time when the gasket starts leaking on these they only do it cold.
     

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