Cams scoring casing

1. sri_130 Frequent Poster Joined: Apr 2012 Doyncaster Posts: 783

   #1 13th October 2012, 19:45

   I've come to fit 708s and the inlet cam wouldn't turn after fitting. Removed to check and found the cams are scoring the casing.
   Anyone ever had this?
   Exhaust cam is fine.
2. DanTvts Established Member Joined: Mar 2011 Torbay Posts: 1285 Mauritius Vts, 206 Gti 180

   #2 14th October 2012, 16:45

   A few people have had to remove some material from the cam ladders in the past, i'm pretty sure when i bought mine way back when it did actually mention you may have to do this.
   Luckily mine were fine but as i said its not unheard of.
   
   Edit: Got mixed up with the area you were talking about, ignore me!
3. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #3 15th October 2012, 08:24

   no it is not normal --you haven,t mixed up the ladders from another head ?
   they are matched to the head --you cannot swop them
   I am presuming you are talking about the bearing surface of the cams and not the cam catching on a web outside of the bearing areas
   It is not a common problem for you to have to modify the head to fit cams --I have never had to do it
4. DanTvts Established Member Joined: Mar 2011 Torbay Posts: 1285 Mauritius Vts, 206 Gti 180

   #4 15th October 2012, 10:18

   Just realised i slightly mis-read the original post somehow, i'm not talking about the same area here, ignore me sorry!
5. sri_130 Frequent Poster Joined: Apr 2012 Doyncaster Posts: 783

   #5 15th October 2012, 18:13

   Hopefully you can see the scoring.
   Got the dremel out in the end.
   
   Did a more thorough search to find that others have had the same.
   
   
6. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

   #6 15th October 2012, 18:53

   Must be a "Friday" head haha. Seems to be excess material from when it was cast. I have never heard of it done, seems to be nearer the side of the lobe?. 708's must be wider lobes than standard then?
7. sri_130 Frequent Poster Joined: Apr 2012 Doyncaster Posts: 783

   #7 15th October 2012, 20:04

   Quote:

   Originally Posted by xsi16v Must be a "Friday" head haha. Seems to be excess material from when it was cast. I have never heard of it done, seems to be nearer the side of the lobe?. 708's must be wider lobes than standard then?

   I'd guess so.
8. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #8 16th October 2012, 08:15

   is this on a j4 or a jp4 head?
   valve spacing is different
9. sri_130 Frequent Poster Joined: Apr 2012 Doyncaster Posts: 783

   #9 16th October 2012, 09:27

   Quote:

   Originally Posted by axsaxoman is this on a j4 or a jp4 head? valve spacing is different

   I'm sorry, I don't understand the difference.
10. atspeedracing Frequent Poster Joined: Aug 2008 ESSEX Posts: 727 106 GTi Turbo

    #10 16th October 2012, 09:54

    j4 / jp4 the distance between the inlet valves is closer or wider apart.
    
    does the number on your cams start with 1321, or 1322 ?
    
    ignore the head for the moment - does the cam lobe run CENTRALLY over the cam follower / buckets ?? or are they biased to one sideof the follower?
    
    - colin.
11. sri_130 Frequent Poster Joined: Apr 2012 Doyncaster Posts: 783

    #11 16th October 2012, 12:17

    Quote:

    Originally Posted by atspeedracing j4 / jp4 the distance between the inlet valves is closer or wider apart. does the number on your cams start with 1321, or 1322 ? ignore the head for the moment - does the cam lobe run CENTRALLY over the cam follower / buckets ?? or are they biased to one sideof the follower? - colin.

    I wish I could tell you, they're installed. And the at power bodies installed too. Runs like a dream.