Sdp cat

Discussion in 'Ask An Owner Operator' started by Yord, Dec 12, 2024.

  1. Yord

    Yord Bobtail Member

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    Dec 12, 2024
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    I have a Cat SDP engine that is using oil. I would like opinions on whether it is worth repairing this engine or buying another Cat that is not an SDP and repairing it.
     
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  3. abyliks

    abyliks Road Train Member

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    Pretty sure the block is the same from mbn on up, it’s the emissions garbage that ruined the SDP
     
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  4. 77fib77

    77fib77 Road Train Member

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  5. Cat sdp

    Cat sdp . .

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    If its rebuilt properly it can be a very good piece….. But you need someone that knows what to do …
     
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  6. Yord

    Yord Bobtail Member

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    I have doubts about buying another engine or repairing this one. Everyone tells me that they are bad. Mine has 650,000 miles and consumes a lot of oil.
     
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  7. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    If you castrated it, it will be fine like any yellow motor. I know of 2 that it did wonders once it was done.
     
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  8. snowwy

    snowwy Road Train Member

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    If it consumes alot of oil. It probably has alot of blowby.

    I once drove a 99 cat motor that started consuming at 175k. Cat is famous for undersized pistons. The top compression ring on all 6 pistons was broke.

    That particular motor had the blowby vent on the side of the motor where oil was dripping out. Cats solution was to remove the hose and block it off with an oil fill cap. Swap the middle valve cover for a vented valve cover and hook the hose on to that. It fixed the oil loss problem. But still consumed oil.

    Excessive blowby also dilutes the oil to the point you lose oil pressure.
     
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  9. Long FLD

    Long FLD Road Train Member

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    I would rebuild it and make it not an SDP.
     
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