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Thread: V8 Valve Guides

  1. 15th June 2016, 07:24 AM #21
    TheTree
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    Quote Originally Posted by Pedro_The_Swift View Post
    so, are we thinking this through to find fault ?
    or just fixing it?
    I already know what caused the issue, it was oil starvation to the top end caused by poor servicing and/or lots of short trips.

    I should really have checked this area when I had the heads off before and had to replace the rocker gear

    Steve
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  2. 15th June 2016, 07:31 AM #22
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    Pedro_The_Swift
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    Not really poking you with a stick Steve,, honest! --but,,
    daily drive kays?
    type of oil?
    time between services?


    Its not often we get a valve stem seal failure,,
    just trying to get some facts on why,,

    and on how I can avoid it--

    PM maybe?
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!

    1988 Isuzu Bus. V10 15L NA Diesel
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  3. 15th June 2016, 07:51 AM #23
    TheTree
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    Quote Originally Posted by Pedro_The_Swift View Post
    Not really poking you with a stick Steve,, honest! --but,,
    daily drive kays?
    type of oil?
    time between services?


    Its not often we get a valve stem seal failure,,
    just trying to get some facts on why,,

    and on how I can avoid it--

    PM maybe?
    I always service my engines at 5K intervals and it is my daily driver.

    I bought the engine second hand and was told it had only done about 50K since a full rebuild by TRS in Sydney.

    I noticed a small coolant leak from the head gasket so I pulled the heads in Nov last year only to find a lot of gunk in the upper oilways and heat stressed rocker gear. As I said, I should have checked the valve area when I had the heads off then

    SO the cause is poor servicing it seems. I note the wear on the valves was not even but all the seals were as hard as a rock, again I assume because of heat stress

    Steve
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  4. 15th June 2016, 01:46 PM #24
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    Pedro_The_Swift
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    would it be wise to look at bottom end bearings as well?
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!

    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]
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  5. 16th June 2016, 07:31 AM #25
    TheTree
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    Quote Originally Posted by Pedro_The_Swift View Post

    would it be wise to look at bottom end bearings as well?
    I thought long and hard about that and decided not to at the moment, possibly a bad decision.

    The mains and bigends have their own direct high pressure feed from the oil pump I believe, so they are less likely to have been starved for oil.

    The cam gets a lot of splash from the sump as well and it seems OK

    So it's a bit of educated risk taking at this time

    Steve
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