Results 1 to 5 of 5

Thread: Hyundai 1.7 crdi engine noise

  1. #1
    Guest
    Join Date
    Apr 2006
    Location
    Glasgow-shire
    Posts
    1,974
    Rides
    0

    Hyundai 1.7 crdi engine noise

    I bought a 2012 Hyundai IX35 1.7 diesel for my missus which had been off the road for 3 years, only 36k miles with full service history to back it up, and had a suspected head gasket issue (pressurising coolant). My and my mechanic mate Tom replaced the head gasket and head bolts, put it all back together and was running great. After a couple of weeks use and about 500 miles it started making some noise when warm, and had an oil leak at the turbo oil feed/return flange so I removed the turbo, fixed the oil leak with a very light smear of silicone gasket (high temp stuff for exhausts), and tried to remove the injectors to remove the rocker cover to check everything was ok under there. Could only get the middle 2 injectors out but noticed quite a bit of oil down the shaft of one, and at the tip. I put them back in, connected it all back up and the engine ran fine for 2 days without issue. 3rd day and it sounded like a tank, and I was pretty sure there was an exhaust leak at the turbo cos thatís what it sounded like. No exhaust leak there, and a hefty smell of diesel smoke in the engine bay.

    So worked out the oil seals around the top of the injectors probably need replaced, have ordered them from Hyundai along with injector seals (copper washers) and all other gaskets for the injectors. Currently waiting for them to arrive, although Iím sceptical that the problem/noise lies with the injectors. Engine sounds fine when cold, then once itís warmed up after about 10 mins driving it sounds like the engine is about to die. Still pulls strongly though, feels absolutely fine, oil level and grade are fine, and no warning lights on the dash. Also the noise goes away under acceleration. Itís mostly obvious at idle, off boost and on overrun.

    Anyone got any experience with these engines?

  2. #2
    Guest
    Join Date
    Jun 2009
    Location
    walsall/tamworth
    Posts
    6,542
    Rides
    0
    could you not smoke test it to rule out any leaks around the turbo?

  3. #3
    Guest
    Join Date
    Apr 2006
    Location
    Glasgow-shire
    Posts
    1,974
    Rides
    0
    Quote Originally Posted by green_rs13 View Post
    could you not smoke test it to rule out any leaks around the turbo?
    Did a smoke test, checked for any leaks around the turbo but everything was fine.

    Did an oil change and the filter was thick with crud. Put the fresh oil in, took it for a quick drive and the engine is quiet again! Will do another oil change again after a few hundred miles to be safe. Must have been either not enough oil getting through the filter or the tappets not filling up. Seems fixed now anyway and hopefully no lasting damage.

  4. #4
    Guest
    Join Date
    Jun 2009
    Location
    walsall/tamworth
    Posts
    6,542
    Rides
    0
    glad that's fixed it. I always drain oil out when its hot now.

  5. #5
    Guest
    Join Date
    Apr 2006
    Location
    Glasgow-shire
    Posts
    1,974
    Rides
    0
    Quote Originally Posted by green_rs13 View Post
    glad that's fixed it. I always drain oil out when its hot now.
    Yeah same here, and I usually use Fortť engine flush and fuel treatment too. Sump was cleaned out make sure there was no bits of gasket sealer in the oil but there must have been scummy oil left in the engine from the failed head gasket. All fine now.

Posting Permissions

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