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What would you do......

Discussion in 'Technical Q&A' started by 50hdmc, May 1, 2009.

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  1. 50hdmc

    50hdmc Formula 3

    Oct 10, 2006
    1,211
    Michigan
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    mark s
    #1 50hdmc, May 1, 2009
    Ok so my engine out 30k service on my 348 was completed (so I thought). No engine lites, starts, idles, runs great........however, for the first 2-3 minutes there is ticking coming from the 5-8 valve cover I beleive. Goes pretty much away after the warm up period. Using REdline 5w40 oil......oil presssure at 70lbs. Didn't do this before the 30k service.....
    Any help?????? Should this be a big concern or can it go away with a few miles on the car (has around 20 miles since I finished the service)
    mark
     
  2. troy_wood

    troy_wood Formula 3

    Apr 28, 2007
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    Troy Wood
    #2 troy_wood, May 1, 2009
    Mark - did you use a stethescope to isolate the tick? I've just learned recently that our engines are full of trickery when it comes to where the sound is actually coming from...

    Did you check and adjust valve lash during the major? Be honest...:)

    Troy
     
  3. 50hdmc

    50hdmc Formula 3

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    #3 50hdmc, May 1, 2009
    Last edited: May 1, 2009
    Hi Troy......Ok, I will be honest. I didn't have any unusual sounds before the service and I knew they had been adjusted a few years eralier. So, nope, I didn't check them. I used a stethescope and I think it is coming from 5-8 (6 or 7). I wish I could say it might be a belt - not so. I don't know if I should pull the valve cover off and see if I am getting oil up there or if this can wait until next winter.......it runs incredibly smooth, starts right up.....after all that work I am pretty down about this problem.

    I was feeling pretty good too...I have literally EVERYTHING working properly! Every light, the seat belt runners, dash lights, oil pressure and temp guages (temp wasn't working before). Had a couple of leaks, oil and water, fixed those - no leaks now. I painstakingly detailed everything. In short, I fixed a lot of stuff - took all winter. I started mine about the time you started yours and I am just finishing. I have researched the posts on the "ticking" noise but haven't found anything to address my issue directly. Any insite/advice/direction, would be greatfully appreciated.
     
  4. oldcoin

    oldcoin Formula Junior

    May 1, 2006
    258
    Reno NV
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    Tony Mitchell
    #4 oldcoin, May 1, 2009
    50hd, I don't think valve adjustment. I have heard a similar noise on other models that seems to come from the Alternator. Those tiny hard plastic fan belts tend to be stiff at start up and make a slapping/ticking noise for a few seconds.

    Tony
     
  5. 50hdmc

    50hdmc Formula 3

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    #5 50hdmc, May 1, 2009
    ....I had the alternator rebuilt although it was working fine.......but I will check that out. If it IS a valve adjustment will I cause damage driving it?
     
  6. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
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    Jeff B.
    #6 Miltonian, May 1, 2009
    Is it possible that you didn't torque one of the spark plugs down correctly?
     
  7. Sunracer

    Sunracer Formula Junior

    May 18, 2005
    661
    Makati City
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    Pierre Beniston
    #7 Sunracer, May 1, 2009
    a minor exhaust leak, it will tick, then go away as wartm up expansion seals it
     
  8. 50hdmc

    50hdmc Formula 3

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    #8 50hdmc, May 1, 2009
    I will recheck the spark plugs but I feel like I torqued them right.......does an exhaust leak tick like that? I mean it sounds like a lifter I am afraid to say....
     
  9. Shamile

    Shamile F1 Veteran

    Dec 31, 2002
    6,712
    Lakeland FL
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    Shamile
    #9 Shamile, May 2, 2009
    Dear Ferraristi,

    I had an alarming ticking sound on my 91 Testarossa just like you describe. It would come on while the engine was cold then go away after warm up.

    I was all over the valve covers with a stethoscope and couldn't find anything.

    It was a slight coolant leak coming off the main coolant hose that crosses over the front of the engine. When cold, a few drips would drop on the Alt. belt and make a horrible ticking sound like a valve.

    I found a drip on the bottom of the coolant hose, tightened the hose clamp a 1/4 turn and problem solved...ahhh, if were only always like that. :)


    Shamile

    Freeze...Miami Vice !
     
  10. gidge348

    gidge348 Formula Junior

    Dec 12, 2008
    343
    Perth West Australia
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    Ian Wood
    #10 gidge348, May 2, 2009
    Just for peace of mind I would take one of the cam belt tops off and have a quick look for any signs of marks on the belt.

    I guess the absoloute worst thing it could be is a fence coming off a cam pully and you DO NOT want that.... :(

    To be honest, by the way you describe this I dont think it is but for 10 minutes work the peace of mind would be worth it.
     
  11. troy_wood

    troy_wood Formula 3

    Apr 28, 2007
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    Troy Wood
    #11 troy_wood, May 2, 2009
    I'll just throw this out there... I know when I finished my engine out service every time I started the car I was almost neurotic about listening for any little sound, smell or vibration - completely fixated, almost looking for something out of place... Took a bit to get over this paranoia...:) There is a lot of front-end belt noise in our cars especially when cold. Is it possible you just didn't notice the sound before? Food for thought.

    Outside that - it could be the alternator tensioner. Pop the belt off and start her up...
     
  12. 50hdmc

    50hdmc Formula 3

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    #12 50hdmc, May 2, 2009
    Hey Troy.......yeh Iknow waht you mean, but I am not neurotic, the noise is there and I am concerned about causing damage. Now I can hear it loud and clear from both the phase sensor housing and the plenums. So, maybe it isn't the valves afterall, but sure sounds like it to me. I will do as you suggested and see what I an find..
    thanks for everyones help.....I'll post the "answer" once I figure it out.

    ms
     
  13. 50hdmc

    50hdmc Formula 3

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    #13 50hdmc, May 2, 2009
    ...... with regard to the fence....I had them tig welded - I am certain they haven't come loose. I will check the belt condition thought as you suggested. thanks for your input, it is appreciated.
    ms
     
  14. Artvonne

    Artvonne F1 Veteran

    Oct 29, 2004
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    #14 Artvonne, May 3, 2009
    A ticking sound means different things to different people. But if it wasnt doing it before, I would check it out thoroughly before it becomes a bigger something.

    This means you listen with a stethoscope to isolate the noise as best you can, pull the covers and double check valve clearances, and otherwise leave no stone unturned. You really DO NOT want to blow one of these things up. Remember too, new belts often put greater loads on the timing belt drive pulley outer bearings. Once they were quiet, now they may be dying. Catch this before it rears its ugly head.
     
  15. Modeler

    Modeler F1 Veteran

    May 19, 2008
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    a.n.other
    #15 Modeler, May 3, 2009
    You might consider videoing or recording a cold start and put it up for others here to listen to.
     
  16. troy_wood

    troy_wood Formula 3

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    #16 troy_wood, May 3, 2009
    I hear ya Mark - track that thing down man...
     
  17. 50hdmc

    50hdmc Formula 3

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    #17 50hdmc, May 4, 2009
    Right Paul............I don't want to blow it up!!! As far as the bearings you are talking about, I replaced both the outer and inner, so they are new. Now I think I hear the ticking noise in several places...I wish it was just me, but my son can hear it too. I do what has been suggested and see if I can figure it out...

    thanks again
    mark
     
  18. Miltonian

    Miltonian F1 Veteran

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    #18 Miltonian, May 5, 2009
    Mark, have you read the "Has This Happened to You?" thread in the 348/355 section? That's why I suggested that you might have loose spark plugs....
     
  19. 50hdmc

    50hdmc Formula 3

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    #19 50hdmc, May 6, 2009
    No I didn't Jeff but I suspected what you were getting at......I'll read it right now. I was pretty careful about how I torqued the new set of plugs.....
    thanks
    mark
     

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