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Thread: Ouch! Cam Lobe Damaged

  1. #11
    Join Date
    Dec 2008
    Location
    Port Angeles, WA
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    239

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    Quote Originally Posted by ashyers View Post
    Randall, as far as oil I believe the PO was running 5w-40 Motul. Do you have a recommendation for a valve spring compressor that works well on the Duratec?
    With Motul, I wonder where the other lobe wear you mention came from. I vote for a complete tear down. Something major isn't right. Sorry, I don't have Duratec experience, so I can't recommend a spring compressor.


    Randall

  2. #12
    Join Date
    Jun 2013
    Location
    N. California
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    37

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    Minor update:
    Did a compression test today to get some more insight:
    Max was 205psi, Min was 190psi

    I haven't had the chance to do a leakdown test or cut open the oil filter to see what's been caught. Maybe tomorrow. If I get really inspired I may pull the motor and put it on a stand so I can have a look...

    Andy

    Andy

  3. #13
    Join Date
    Jun 2013
    Location
    N. California
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    37

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    Yesterday I pulled the dry sump filter screens, cleaned the tank, and opened up the oil filter. The screens were clean and the tank had a minute amount of tiny metal particles on the floor. The pick up is about 3/4" off the floor of the tank so any chunks would tend to collect there. The filter looked OK. As far as the cam, I dropped by a friend's shop who builds mostly high end sprint car and drag motors. I saw my first 900cid NA Hemi with a 1+" lift cam. You could put a tennis ball down the intake ports! The general consensus (guess?!?!) is that the welding on the cam failed to adhere to the base metal.

    As I was monkeying around with the oil system I found a few things that bugged me about the wiring and cooling system, and decided to pluck the motor. As I said earlier, down the rat hole...

    While preparing to pull the motor I've yanked out about 10' of 5/8" heater hose, gained access to the ECU, and if I can steal some time during the holiday I'll finish the job.

    When I opened up the ECU I also found some this:


    Anyone want to try and decipher the engine description. It's "car-chelogy" .

    and this:


    I guess this is the orig connector for the factory ECU? There's was some splicing done to fit the MBE unit that I'm going to clean up.

    I'm pretty happy that the ECU was not "locked" and I've also obtained the PIN to open up the Master level and really cause problems! This will be helpful it I replace the cams with a different grind and that's looking like a good option at this point. I'm not sure I want to go down the road of welded cams further.

    Does anyone have cam advice? The map info above gives an idea of the current setup (7250 Limiter, 11.5:1CR) and even with a flatted cam (.400" lift, 244deg dur.) it's pretty healthy. It would be nice to obtain them on this side of the pond.

    Andy

    edit: fixed images
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    Last edited by ashyers; 11-17-2018 at 04:57 PM.

  4. #14
    Join Date
    Dec 2014
    Location
    Los Angeles
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    178

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    Try Crane in San Diego. They have a pretty big database and will respond to phone calls.

  5. #15
    Join Date
    Feb 2009
    Location
    NYC
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    4,038

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    Second the recommendation on Crane - I have 2 camshafts on order with them right now. Nice guys.


    Andy - was your post #13 missing some images?
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R wit 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore Group A (restoration - engine rebuild)
    1982 Ferrari 400i (catching up on deferred maintenance)
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth (fettling after long period of storage)
    1990 Range Rover 2 dr Classic

  6. #16
    Join Date
    Jun 2013
    Location
    N. California
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    37

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    Mike,
    Thanks, I'm not sure what happened there.

    Is there a way to eliminate the 2nd images?

    So Crane gets 2 votes, how about Crower?

    Andy

  7. #17
    Join Date
    Feb 2009
    Location
    NYC
    Posts
    4,038

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    THe second image is because you attached the images on the forum. If you just embed an image hosted on a third party site then those second images will not show up. Ignore it for now.


    I have heard of Crower frequently but never used them.
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R wit 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore Group A (restoration - engine rebuild)
    1982 Ferrari 400i (catching up on deferred maintenance)
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth (fettling after long period of storage)
    1990 Range Rover 2 dr Classic

  8. #18
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    178

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    If you order from Crane, make sure that they understand the the cams are for a track car. Otherwise, they will adjust the grind to add 4 degrees of advance (?) for emissions. I had to adjust this out with adjustable sprockets. Pain in the ass.

  9. #19
    Join Date
    Jun 2013
    Location
    N. California
    Posts
    37

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    papak,
    What grind are you using?

    How's the performance? I don't intend to push this motor over 7250 and will be driving it on the street with an occasional auto-X.

    You mentioned Crane is in San Diego, is it possible you have Crane and Crower confused? Crower is in San Diego and Crane is in Mississippi.

    Thanks,

    Andy

  10. #20
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    178

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    I have the Stage 1 cams. Whenever I do rebuild the motor, I will use the Stage 2 cams. They are listed for boosted applications but Tom Carlin (Birkin distributor) said that they work well with a normally aspirated Duratec with stock rods and pistons. I use a rev limit of 7000 rpm.

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