Houston, we have a problem...
  • Help
Results 1 to 24 of 24
  1. #1
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default Houston, we have a problem...

    The Fuego Turbo has been running like a dream since I fitted the turbo and associated parts.

    In fact it has been so thoroughly unremarkable that I was beginning to wonder whether everything would suddenly explode all on the same day.

    The good run appears to have come to an end and the worst thing is that it appears to be 100% my fault ...

    Advertisement


    I fitted an EGT sensor yesterday and tidied up some wiring in the process. This included running some wiring through the cable sleeve that runs along the cross-member above the gearbox near the TDC sensor. In the process I have inadvertently managed to slide the TDC sensor to it's fully advanced position (my TDC - and the timing curves starting point - can be adjusted). I was intending to araldite it into place once I got the thing fine tuned on the dyno...

    I started the car up and had noticed the idle was 200 rpm or so higher than normal but stupidly didn't take the time to investigate the problem.

    Anyway, I took the car for a drive last night to check the EGT gauge and did a couple of high load power runs.

    The car felt like it was going harder than normal but I still didn't click until I booted it at about 2000rpm and the thing started pinging - badly. I got off the gas pretty quick, but I think the damage has been done.

    The engine has previously had very little blow by and it is now breathing severely (it filled the catch can on the drive home ) and is smoking a bit under load. The motor still seems to run ok with no mechanical noises, but it seems to have a slightly loping idle note indicating the damage might be localised to one piston.

    I'm yet to do a compression check, but I'm pretty sure one pot will be dead. I'm hoping it's just a broken ring, but after running it at high load and at low rpm with fully advanced timing (was running at close to the standard position) I'm thinking maybe a cracked piston...

  2. #2
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    Doh...

    Go and get the unleaded 2.2 R25 motor at the farm in Guildford if you want it. Has around 200K on it, but was in good nick. Has been parked with the exhaust manifold off for a few years though. Is just sitting on the mounts, gearbox already gone - lift out and take away.

  3. #3
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by Haakon View Post
    Doh...

    Go and get the unleaded 2.2 R25 motor at the farm in Guildford if you want it. Has around 200K on it, but was in good nick. Has been parked with the exhaust manifold off for a few years though. Is just sitting on the mounts, gearbox already gone - lift out and take away.
    I might take you up on that.

    G'day, is that a steel sump or alloy?

    I have a new set of sleeves and pistons to go into the motor, but I'd like to have a spare donk to build up with some forged pistons and rods etc.

  4. #4
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    It was a rare unleaded manual - steel sump.

    Rip the head off first, and I reckon you and my Dad could lift it out...

    The Fuego shell is next to it. Hint hint... And R25 front end bits you want? There is a wanted post for an R25 heater core at the moment - you could do him a favour too.


    (ie help me get rid of bits )

  5. #5
    Fellow Frogger! deja vu 25's Avatar
    Join Date
    Jan 2002
    Location
    Canberra
    Posts
    657

    Default

    G'day Haakon
    I don't suppose you have a UN1 box laying around with clutch, master cylinder etc?
    I am thinking it should fit into the Baccara as they did come with them in Europe (both in V6 - Turbo and naturally aspirated guises).
    Cheers
    Luke
    Cheers - Luke

    1990 Renault 25 V6 Baccara - Gunmetal Grey
    1974 Renault 17TS (1317) - Silver

  6. #6
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by Haakon View Post
    It was a rare unleaded manual - steel sump.

    Rip the head off first, and I reckon you and my Dad could lift it out...

    The Fuego shell is next to it. Hint hint... And R25 front end bits you want? There is a wanted post for an R25 heater core at the moment - you could do him a favour too.


    (ie help me get rid of bits )
    I've got a fold up engine crane that should help.

    Ill have a look and see what else i can heist

  7. #7
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    Quote Originally Posted by mistareno View Post
    I've got a fold up engine crane that should help.

    Ill have a look and see what else i can heist
    Heist away - anything on/in the white car you can have, hands off the silver one. Fuego still have a rear beam, rear glass, a few panels and part of a gearbox on the front seat. Really should have gone to the crusher years ago...

    And get Dave off his butt and get that green 504 taken too.

  8. #8
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    Quote Originally Posted by deja vu 25 View Post
    G'day Haakon
    I don't suppose you have a UN1 box laying around with clutch, master cylinder etc?
    I am thinking it should fit into the Baccara as they did come with them in Europe (both in V6 - Turbo and naturally aspirated guises).
    Cheers
    Luke
    Nup - its a 4 cylinder R25, and it was an NG3 box. The manual conversion bits went into another froggers R25 years ago...

  9. #9
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    Anyway, dispensing with the hard sell and getting back on topic...

    Going to drive it until it drops? Always wondered how hard it is to kill a Dourvrin, looks like a fine opportunity to find out in style

  10. #10
    1000+ Posts jo proffi's Avatar
    Join Date
    May 2003
    Location
    sydney
    Posts
    8,484

    Default

    Quote Originally Posted by Haakon View Post
    Always wondered how hard it is to kill a Dourvrin,
    My 'work in progress' is refusing to die. Must be the two standby donks in the shed.

    Jo

  11. #11
    1000+ Posts
    Join Date
    Oct 2002
    Location
    Melbourne Victoria
    Posts
    12,616

    Default

    Sad, that was a very sorted Fuego, I was very impressed when I drove it briefly and that was in the early days just after you had put it on gas. probably the only hint was the slight gassy smell that made it easy to pick..

    Sorting out my own Fuego at the moment, I'll try and not destroy it!!


    Ken

  12. #12
    VIP Sponsor David Cavanagh's Avatar
    Join Date
    Feb 2001
    Location
    Romsey, Victoria, Australia
    Posts
    4,904

    Default

    Quote Originally Posted by mistareno View Post
    I've got a fold up engine crane that should help.

    Ill have a look and see what else i can heist
    I think your car knows DECA is coming up soon and it just doesn't want to play.

    If your going up to Haakons on a Sunday sing out and I'll come give you a hand (and maybe squeeze a 504 in the boot).
    David Cavanagh

    FRENCH CONNECTION / PEUGEO WRECKING / RENOSPARES / CITROWRECK

    03 9338 8191 or 03 93354008

    34 KING St
    AIRPORT WEST
    VIC 3042


    frenchconnect@bigpond.com

    https://www.facebook.com/FrenchConect

  13. #13
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by David Cavanagh View Post
    I think your car knows DECA is coming up soon and it just doesn't want to play.

    If your going up to Haakons on a Sunday sing out and I'll come give you a hand (and maybe squeeze a 504 in the boot).
    It'd better be fixed by then, I'm back at work in a fortnight... Was hoping to do the hill climb day at robroy next month.

    If i go down on a Sunday I'll let you know. I'm probably going to make it a round trip through newbridge as i have to drop something

  14. #14
    1000+ Posts
    Join Date
    Nov 2010
    Location
    Melbourne
    Posts
    3,651

    Default

    The pressure is off Richard, the come and try day has been cancelled.
    If you've got too much traction, you haven't got enough horse power ...




    .2010 Holden Commodore Ute
    2001 Renault Sport Clio Cup 27 of 85
    1973 Alpine Renault A310/4 1600 VE

  15. #15
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by 27of85 View Post
    The pressure is off Richard, the come and try day has been cancelled.
    Oh, bugger it.

    I did a compression check with an old gauge and they were all 180ish and identical, which I thought was odd. I was starting to wonder wtf was going on so I grabbed my old man's new gauge and did another check.

    No 1 - 190
    No 2 - 190
    No 3 - 190
    No 4 - 80...

    Bugger.

    I've pulled the head off, and there is no visible damage to the piston (from the top) and the bores are really good so I'm hoping it's just broken a ring and the piston lands are all ok...

    If not, I'll whack in a new set of sleeves and pistons.

    Hopefully pull the piston on the weekend.

  16. #16
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    Didn't fry an exhaust valve seat...?

  17. #17
    1000+ Posts jo proffi's Avatar
    Join Date
    May 2003
    Location
    sydney
    Posts
    8,484

    Default

    Quote Originally Posted by mistareno View Post
    Hopefully pull the piston on the weekend.
    I hope its a 2.0 donk or you are in for a stack of work.

    Jo

  18. #18
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by Haakon View Post
    Didn't fry an exhaust valve seat...?
    No, it's got sudden blow-by and smoke under load, so I don't think so.

  19. #19
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by jo proffi View Post
    I hope its a 2.0 donk or you are in for a stack of work.

    Jo
    2.2 - The motor is out so I'll take the chance to plumb in the vacuum pump and new oil drain for the turbo.

  20. #20
    1000+ Posts jo proffi's Avatar
    Join Date
    May 2003
    Location
    sydney
    Posts
    8,484

    Default

    Quote Originally Posted by mistareno View Post
    2.2 - The motor is out so I'll take the chance to plumb in the vacuum pump and new oil drain for the turbo.
    Cool, I had this image of you trying to remove a piston with the motor in place.

    Jo

  21. #21
    1000+ Posts Haakon's Avatar
    Join Date
    May 2002
    Location
    canberra...
    Posts
    8,876

    Default

    It was an optimistic thought...

    Quote Originally Posted by mistareno View Post
    No, it's got sudden blow-by and smoke under load, so I don't think so.

  22. #22
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Quote Originally Posted by Haakon View Post
    It was an optimistic thought...
    Just an update, I ripped the head off and all looked perfect. I then pulled out piston No.1 and it was pretty obvious what had happened.

    The rings were fine, but the top 2 ring lands had cracked. Typical detonation induced damage unfortunately, which I unfortunately already 99% knew...

    Piston 4 had a crack on the top land too.

    I'm really peeved because the bores look really good and the engine had next to no blow by prior to my stuff up.

    Anyway, I have installed a set of flat top pistons and new sleeves (9.2:1 compression) which should be a little more turbo friendly and I'll throw some new bearings and a new clutch at it while it's out. I'll try and squeeze the vacuum pump in there as well and hook up the water methanol injection, but I only have a few days before I need the car and I want it back together for the round up.

  23. #23
    Administrator
    mistareno's Avatar
    Join Date
    Nov 2002
    Location
    Melbourne
    Posts
    4,926

    Default

    Renault quality control....

    Just a side topic, when taking this engine apart (and it appears to be in good nick and to have never been apart), it appears that the engine has been assembled at the factory with one con rod 180 deg out.

    The manual says that the oil squirters should be on the oil filter side of the engine and three were, however, one of them was the other way around, which probably means it was spraying into the side of the cylinder or something...

    FWIW the incorrectly installed conrod wasn't on the piston that died, so I'm not sure how much they really do...

    It does make you wonder how careful they are when the assemble an engine on an assembly line...

  24. #24
    1000+ Posts cav91's Avatar
    Join Date
    Nov 2010
    Location
    Romsey, VIC
    Posts
    2,350

    Default Re: Houston, we have a problem...

    So will it make the round up Richard?

    Sent from my XT905 using aussiefrogs mobile app
    2011 Renault Koleos manual petrol, yes it's boring, but not as boring as:
    2017 Renault Koleos auto

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •