Jeffers_S13
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| posted on 4/2/05 at 09:21 AM |
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Well I didnt get to the crucial point last nght, my last few 'small' jobs took till 10pm then when I put the water in, the water pump
gasket decided to leak a little bit and the turbo water feed was pi$$ing water out, after spending an hour putting fresh dowty washers in the turbo
banjo connection it was my bedtime  plus I was very VERY wound up, as there is practically no access to the inner water feed pipe and I was soaked
as all the excess water dribbled down my arm, anything to do woth the turbo with engine installed is always a real faff.
My followers were initially kept in sequence, but after taking them to the machine shop I use to get them soaked to free and clean them all, the
engine guy there said its not important, so theyve gone back in any order, but they are free to spin as the engine is running anyhow and are plastered
in oil whilst running so the cam lobes will never see the exact same surface twice during the lifetime of the engine ? so I thought it didnt matter
either.
James
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craig1410
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| posted on 4/2/05 at 09:44 AM |
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Hmm...
I don't wish to add to your worries but every engine building book I have ever read (at least 8) describes keeping the cam lobes and followers
paired up as "crucial", other wise what is the point of the hole bedding in exercise?
Anyone else know the basis for this lobe/follower pairing recommendation?
Cheers,
Craig.
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Jeffers_S13
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| posted on 4/2/05 at 11:43 AM |
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Hang I think there may be crossed wires here, probably due to my incorrect terminology ? I probably should be calling them hydraulic tappets or
hydraulic followers. Does this clear things up ?
There is a pic of them all here after being washed and squeezed :
http://uk.pg.photos.yahoo.com/ph/jeffers_s13200sx/detail?.dir=/416f&.dnm=408c.jpg&.src=ph
James
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craig1410
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| posted on 4/2/05 at 01:09 PM |
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No crossed wires I'm afraid, I knew what you were referring to. I tend to call them cam followers myself, whether hydraulic of solid as I think
this is a good description of what they do (ie. "Follow" the cam lobes). They are often called "lifters" as well.
I can only re-iterate that keeping valve train components together in the same sequence which they were in when new is very important. This applies
from follower through to the valve itself.
As for the break in of a new cam, it is explained nicely here
in the two articles about camshafts.
The bits which stood out to me in particular as a logical benefit of higher RPM were: Oil Splash and reduced cam lobe nose pressures.
Cheers,
Craig.
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Jeffers_S13
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| posted on 7/2/05 at 09:48 AM |
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T'is done, 
First, fully, from scratch nut and bolt rebuilt engine I have done got fired up yesterday Obviously Im not the first person, nor will I be the last
but quite an achievement for me.
After a couple mins of interminttent turning over to get oil pressure, I put plugs and coil pack harness on etc etc Then crossed fingers, went over
everything again in my head what I could have forgotten and fired it up, started first turn ! was well chuffed, was lots of clattering as lifters
pressurised, you can almost count how many are left to go, I ran it at a fast idle of 2500 rpm for 15 mins till warm, checking for leaks and lights
coming on on dash, All the steam and smoke from exhaust and block was quite worrying but I was expecting it, as it cleared off it was a relief.
Then went for a drive, didnt nonce about nor thrape the nuts of it, kept the boost low and didnt go above 3000rpm. Drove around some country lanes in
a figure of 8 for 20 miles, lots of changing gear, lots of coasting/slowing down in 5th for high the high vacuum thing. Engine goes great and sounds
real sweet, strange smell from exhaust, kind of new smell hard to describe. Very please, another 30 miles to go, gonna get some magnets to stick to
the sump before I do the rest though.
Will let anyone know if I have problems especially with cams, I REALLY hope I dont...
Thanks for any help and advice people have given me
James
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chunkielad
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| posted on 7/2/05 at 11:00 AM |
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Well don fella!!!
Gla dit all went well.
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craig1410
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| posted on 7/2/05 at 12:50 PM |
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Well done!
Craig.
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Jeffers_S13
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| posted on 7/2/05 at 01:19 PM |
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Thanks guys,
Few pics here, showing my initial teething probs aswell...
http://uk.pg.photos.yahoo.com/ph/jeffers_s13200sx/album?.dir=416f&.src=ph
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