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D port timing cover

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P S Robbo
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2019/01/05 14:35:50 (permalink)
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D port timing cover

Hi, I have D port heads on my 72 V6 but have the offset fan cover on car. I am re gasketing timing cover and was going to put on my centre fan D port timing cover that I had lying around. I have noticed that the centre fan cover pulley connection sticks out about 15mm more which would put my fan belt out of line with all other pulleys. Is this normal with centre fan cover? Do I have to get deeper fan pulley so it sits back further or extend other pulleys? If its all too hard I will just put off centre fan cover back on. Cheers PSR
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    Wiggy333
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    Re: D port timing cover 2019/01/05 15:48:54 (permalink)
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    Two different bearings were used for the timing cover. You might be able to swap the bearing.
    #2
    spud15
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    Re: D port timing cover 2019/01/05 19:02:00 (permalink)
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    Yes u have to use the larger pulley
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    gtv6capri
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    Re: D port timing cover 2019/01/05 20:04:02 (permalink)
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    I have done it in the past, I *think* I used the 1600 pulley to get the fan belt to line up

    Capri The car I always promised myself
    #4
    P S Robbo
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    Re: D port timing cover 2019/01/05 20:39:05 (permalink)
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    Thanks guys, can't change out bearings as extra length is in the casting. Will look at pulley situation. cheers
    #5
    spud15
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    Re: D port timing cover 2019/01/05 21:11:17 (permalink)
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    One for sale on eBay uk
    #6

    Wiggy333
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    Re: D port timing cover 2019/01/06 11:00:09 (permalink)
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    I think I’m correct in saying the only difference in DPort to Oval port was the place of the fan. The pulleys were the same size and offset. The covers are the same thickness off from the engine is the same. So it can only be the bearing.
    #7
    spud15
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    Re: D port timing cover 2019/01/06 12:06:57 (permalink)
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    No
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    spud15
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    Re: D port timing cover 2019/01/06 12:17:03 (permalink)
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    Attached Image(s)

    #9
    spud15
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    Re: D port timing cover 2019/01/06 12:17:53 (permalink)
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    The larger one is the d port style - larger OD and deeper
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    P S Robbo
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    Re: D port timing cover 2019/01/06 13:42:18 (permalink)
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    You got it spud, cheers
    #11
    Timmo
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    Re: D port timing cover 2019/01/06 21:24:23 (permalink)
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    The larger OD pulley would mean a slower fan speed, wonder why they went that way? How much would it affect cooling?
    #12
    GTV6
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    Re: D port timing cover 2019/01/07 00:08:52 (permalink)
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    D ports were all about power so slowing the fan would mean less power consumed by the fan and maybe they set the dia so the same fan belt could be used.  I wonder if this was also when they introduced viscous fan couplings.
    #13
    Wiggy333
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    Re: D port timing cover 2019/01/09 20:36:13 (permalink)
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    Stand corrected Spud. They do look like completely different pulleys. Offset will be the same with each setup though? Dport and pulley or oval port and pulley will leave the belt in the same position? Yes.
    #14
    spud15
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    Re: D port timing cover 2019/01/09 21:16:20 (permalink)
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    Yes that's right- offset is the same
    #15
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