Help WTD - Crank Pulley Compatablity - R5 Alpine 847 eng block
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Thread: Help WTD - Crank Pulley Compatablity - R5 Alpine 847 eng block

  1. #1
    Fellow Frogger! R8 Dream's Avatar
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    Default Help WTD - Crank Pulley Compatablity - R5 Alpine 847 eng block

    I hope someone can help out.

    i thought that a 688-02 crank pulley would fit on my 847 (R5 eng block) but to my surprise it did not.

    I purchased the engine from Greg Gibson ( built by Alpine Affaire) as part of an incomplete R8 rally car project but did not come with a crank pulley.

    I am playing around with a suitable alternator set up (inspired by Ross - see separate thread) and need this pulley before I can go any further to get alignment right.

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    i have included a few photos and hope it makes sense (sorry but the photos maybe upside down as I can't work out yet how to rotate)

    Does anyone have one or can suggest a suitable pulley or where it can be sourced from?

    Many thanks in advance.

    angelo

  2. #2
    1000+ Posts renault8&10's Avatar
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    An 847 is basically a 1.4 block, so shouldn't a pulley off a 1.4 aussie block be suitable?
    I can't recall if there is any difference between an aussie 847 and a 1289 pulley.

    KB
    KB


  3. #3
    Simon's Avatar
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    Try the usual suspects of French Connection or Caravelle Imports. What you will likely find is the later two-piece type pulley with the separate pulley and centre hub.
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    Fellow Frogger! R8 Dream's Avatar
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    Thanks guys, I will follow up with Dave to see if he can help out, or else I will come back to the forum.

    As I am finding out french cars are not complicated, but you just need to think a little laterally at times.

    Angelo

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    Fellow Frogger! bingham driver's Avatar
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    I have 3 pulleys, 803- 842 & 847. They are identical in dimension except the 842 is alloy. You're welcome to one if you need it!
    Once I thought I was wrong but, I was mistaken

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    The alloy pulley sounds like it might be the go to save some weight, but am concerned as steel may be stronger.

    does anyone have any thoughts on pro and cons of each?

    i am definitely interested in taking one but which one?

    angelo

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    1000+ Posts geckoeng's Avatar
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    hi Angelo,
    Is this what you need ???

    Ray

    Help WTD - Crank Pulley Compatablity - R5 Alpine 847 eng block-image0156.jpg
    Ray geckoeng

    Think Old, But Run Modern !!

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    Hi Ray the spigot on the left looks like the one that is still in the engine crank so it looks like I need to pull this out, fit the pulley you have pictured and fit the spigot back in and the retainer bolt (which is not pictured but I have anyway)

    is the pulley you have pictured the alum type as described by Bingham driver?

    if so is there any advantage or disadvantage with alum or steel?

    also do you have the fan and pulley to suit the same?

    angelo
    Last edited by R8 Dream; 8th January 2013 at 10:56 PM.

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    1000+ Posts geckoeng's Avatar
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    Hi Angelo, have sent you an email on old address. if it has changed send me a new one via PM,

    Ray
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    Fellow Frogger! R8 Dream's Avatar
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    Hi Ray
    email sent
    Angelo

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    Quote Originally Posted by bingham driver View Post
    I have 3 pulleys, 803- 842 & 847. They are identical in dimension except the 842 is alloy. You're welcome to one if you need it!
    PM sent
    angelo

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    Angelo,
    Can't help with this but I have a R8/10 driver's door available, new old stock with surface rust. Never been on a car.
    Call me if interested or if anyone else is.
    Mike
    0418211278

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    1000+ Posts Frans's Avatar
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    Angelo,
    What you need is only the pulley in Ray's picture. You already have the collar still on the crank and it will bolt straight on.

    Nice pulley with a TDC mark. The other from R9 and R11 motors do not have the key way nor the TDC mark.

    That pulley is very light and will be more in balance than the alloy one. Alloys could be heavier on one end than the other due to the casting process. The mild steel one is even all round.

    Frans
    Old enough to know better
    Young enough to do it anyway.

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    Quote Originally Posted by Frans View Post
    Angelo,
    What you need is only the pulley in Ray's picture. You already have the collar still on the crank and it will bolt straight on.

    Nice pulley with a TDC mark. The other from R9 and R11 motors do not have the key way nor the TDC mark.

    That pulley is very light and will be more in balance than the alloy one. Alloys could be heavier on one end than the other due to the casting process. The mild steel one is even all round.

    Frans
    Hi Frans, I resolved the problem by changing the water pump pulley. I was trying to get a R8 pulley to work but changed it with a R12 pulley and now all 3 pulleys are within 1mm of each other. I was already running the pulley suggested by Ray so was on he right path.

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