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  1. #241
    Join Date
    Mar 2010
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    Durban
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    Default Re: Build and assembly of 4.6L V8

    Quote Originally Posted by jelo View Post
    Exhaust bandage wrap will help, but you can't use that at the coast as the headers rust off. Luckily you're in Gauteng.

    Another alternative is more insulation/heat proofing on the tunnel.

    Lastly, don't discount the heat generated by the transmission. Are you running the ZF or the R380 or what?
    We've never had a rust issue with wrapping exhaust here in Durban, usually its the p38 headers we do as many seem to have their shields removed by other incompetent people....
    30 years experience and knowledge certainly out weighs a 5min keyboard bashing on google
    Love's electrickery stuff and problems related to it as long as it dont go bang cos then its f......
    NO REPLACEMENT FOR DISPLACEMENT
    A V8 is where thunder is made
    100%WEE

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  3. #242
    Join Date
    Dec 2014
    Location
    Cape Town
    Age
    55
    Posts
    3,540
    Thanked: 2989

    Default Re: Build and assembly of 4.6L V8

    Quote Originally Posted by viperover View Post
    We've never had a rust issue with wrapping exhaust here in Durban, usually its the p38 headers we do as many seem to have their shields removed by other incompetent people....
    Why do people do that?
    And then, once they remove them, they lose them. I tried to find some outer covers for my P38 and gave up eventually.
    Cheers,
    John Kilfoil

    Rover P6
    Land Rover Discovery II Td5 Manual
    Range Rover P38 HSE
    Moto Guzzi LeMans
    Aprilia Tuono V2

  4. #243
    Join Date
    Jan 2016
    Location
    Golf Park
    Age
    32
    Posts
    558
    Thanked: 296

    Default Re: Build and assembly of 4.6L V8

    Little update...

    We just retuned from a trip to Botswana and the motor really ran well, did not miss beat.
    Nice and powerful when i needed it through the thick sand and cruised very comfortable at 100km/h on the open road.

    Consumption on open road with 4 jerry cans and RTT was 6.8km/l
    Game drives around the pans was at around 5km/l
    lowest I saw was 4.6 and that was on the day we moved camp and the road was pretty sandy

    Unfortunately its not a fairy-tale ending, while unpacking the car on Tuesday I also crawled under to clear out pieces of grass that had got stuck in and around suspension parts etc and while there had a look up at the engine bay and noticed coolant streaks coming down the block from around cylinder # 7.

    Have noticed coolant also coming out the head stud at the far back of that cylinder as well.
    Luckily it does not seem to have leaked into the cylinder but more outside from the water-jacket.

    Any idea why this has happened within 10 000km?
    Its a little disappointing and unexpected.

    Will hopefully have the engine out in the next week or two so can have a good look and see what has happened.
    I suspect the head may be loose and moving around.

  5. #244
    Join Date
    Sep 2014
    Location
    Rietkuil, Suurbraak
    Age
    37
    Posts
    51
    Thanked: 32

    Default Re: Build and assembly of 4.6L V8

    How many times have the heads been refitted?
    Have you used studs or stretch bolts?

  6. #245
    Join Date
    Nov 2011
    Location
    Langebaanweg
    Age
    44
    Posts
    2,282
    Thanked: 1717

    Default Re: Build and assembly of 4.6L V8

    Not familiar with the 4.6l, does it have 3 rows of head bolts?

    If so the bottom row was later omitted by LR aa it caused head gasket failures.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind˛)
    '84 Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work.
    The only thing needed for evil to triumph is for a good man to do nothing.

  7. #246
    Join Date
    Jan 2016
    Location
    Golf Park
    Age
    32
    Posts
    558
    Thanked: 296

    Default Re: Build and assembly of 4.6L V8

    Quote Originally Posted by rnieckau View Post
    How many times have the heads been refitted?
    Have you used studs or stretch bolts?
    This is first time i have refitted heads to the block, dont think it ever had heads redone before me.
    Used ARP studs

    Quote Originally Posted by jfh View Post
    Not familiar with the 4.6l, does it have 3 rows of head bolts?

    If so the bottom row was later omitted by LR aa it caused head gasket failures.
    Nope 2 rows of bolts

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    jfh

  9. #247
    Join Date
    Dec 2014
    Location
    Cape Town
    Age
    55
    Posts
    3,540
    Thanked: 2989

    Default Re: Build and assembly of 4.6L V8

    Quote Originally Posted by jfh View Post
    Not familiar with the 4.6l, does it have 3 rows of head bolts? If so the bottom row was later omitted by LR aa it caused head gasket failures.
    As far as I understand it, the 3rd row of bolts was deleted after the SD1 and all subsequent engines are 2 rows.
    Cheers,
    John Kilfoil

    Rover P6
    Land Rover Discovery II Td5 Manual
    Range Rover P38 HSE
    Moto Guzzi LeMans
    Aprilia Tuono V2

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    jfh

  11. #248
    Join Date
    Sep 2014
    Location
    Rietkuil, Suurbraak
    Age
    37
    Posts
    51
    Thanked: 32

    Default Re: Build and assembly of 4.6L V8

    Quote Originally Posted by Jay_B View Post
    This is first time i have refitted heads to the block, dont think it ever had heads redone before me.
    Used ARP studs



    Nope 2 rows of bolts
    May be worth checking, adjusting the torques and testing, before dissembly. A few droplets of coolant from this engine are inconsequential in my books.

    Another method is to add liqui moly stop leak - its designed for use in aluminium blocks with coolant, then flush after a good driveName:  download.jpeg
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