jacko
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 posted on 10/6/04 at 09:03 PM |
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camshaft rattle!!!!!!
HI all - Any suggestions as to why my newly fitted camshaft should rattle like hell - Ive just rebuilt my engine and fitted a new camshaft and
followers etc. does anyone know if there is a difference between 16, 18, and 2ltr pinto camshafts. My engine is a 2.1 ltr pinto fitted with a
injection head. I have fitted the injection camshaft that the supplier recommended but suspect that all is not right. It is rattling like hell. In the
kit it came with injection inlet manifold gasket so that makes me think it should be the correct camshaft it has a yellow dot on the ned wheras the
old one has a green dot on the end. Does this mean anything to anyone. Thanks Jacko.
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jollygreengiant
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| posted on 10/6/04 at 09:17 PM |
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You need to check that you cam/follower clearances are correct, then you need to check that you are not getting contact between cam lobes and spray
bar. The next and most important one to check for is that you are NOT getting valve spring crush, ie the actual valelift is greater than the availble
compression of the valve spring. If contact with spray bar then gently pull spray bar clear. IF spring crush, then you will need to fit new springs
and or machine spring seats in head. I hope that this helpful. You do not say whether or not the head face was machined as this could lead to
valve/piston contact, but if higher lift cam then spring crush is more likely.
Enjoy.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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britishtrident
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| posted on 11/6/04 at 10:11 PM |
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Blocked oil feed pipe should always be changed at the same time --- oh memories of changing dozens and dozens of Cortina cam shafts .
Also see Dave Bakers Puma racing site for Pinto 1600 -2 litre cam differences.
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rodney racing!!
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| posted on 12/6/04 at 01:48 AM |
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did you run it at about 2000rpm when you first started it up to bed the cam in???
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NS Dev
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| posted on 12/6/04 at 08:05 AM |
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as rodney racing says, breaking in new cam immediately at 2000-3000 rpm very important, leaving at idle after fitting new cam will knacker it.
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MikeR
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| posted on 12/6/04 at 09:04 AM |
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and as no one mentioned it, i think kent reconmend that you run it for 20 minutes at that speed. Although I think you're allowed to do it in
burts - ie 4 five minute stints at 2 to 3000 revs.
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Peteff
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| posted on 12/6/04 at 10:23 AM |
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The kit I used had some grease to use on the cam lobes before assembly so it didn't get damaged during the initial startup. It didn't
mention any running in procedure for it but I didn't give it any stick till I was confident it was o.k.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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chrisg
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| posted on 12/6/04 at 11:38 AM |
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Interesting bit in practical classics Pinto build this month, the oil spray bar has two different sized bolts holding it on, two short ones for the
outside ones, and a longer one for the middle. Apparently if you put the long bolt in one of the outer positions it knackers the cam bearing.
worth having a look
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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jacko
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 posted on 12/6/04 at 08:23 PM |
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Rattling cam
Thanks for all the replys I have now sorted the problem inferior cam followers supplied with the camshaft. Re-fitted old cam followers to the head and
it sounds as good as new now. Jacko
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david walker
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| posted on 13/6/04 at 07:52 AM |
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They must have been crap cam followers!
Do not run your new cam with old followers. Now you have found the problem, go and buy some new ones. (Ask your motor factor for some AE ones. They
are very good and half the price of Kent or Piper ones.
Dave Walker, Race Engine Services - 07957 454659 or 01636 671277
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