Theo,
I agree with Tom that there could be an interference between the roller
rockers and the valve covers. I personally use Proform roller rockers under my
original chrome valve covers, since these rockers have a flat top. As far as I
am aware, they are the only roller rocker that will fit without having to add
a spacer. I have tried others with no luck.
If you want I can dig up the part number for the rockers
Could be the crank and the pan/oil pump, too.
Gary
--- On Tue, 4/21/09, Tom Hall <modtiger@comcast.net> wrote:
From: Tom Hall <modtiger@comcast.net>
Subject: Re: [Tigers] Teething troubles.
To: "Smit, Theo" <Theo.Smit@dynastream.com>
Cc: tigers@autox.team.net
Date: Tuesday, April 21, 2009, 8:25 AM
At 06:37 AM 4/21/2009, you wrote:
>The only bad thing is that it's got a fairly noticeable knock, that I'm sure
>the engine didn't have when it was last run about six years ago. Is there
>anything in particular that afflicts the 5.0 roller-cam engines when they've
>sat for a long time? As far as I know nothing fell in any of the ports in
the
>interim... when I swapped the engine into the Tiger I put on the cast
'Cobra'
>covers and the Canton windage tray and oil pan, but with stock 5.0 valve
train
>I wasn't expecting any interference issues. The engine turned over by hand
>without any noticeable tight spots.
>
>Any ideas or suggestions would be most welcome.
>
>Theo
If you are attempting to fit Ford's roller rockers under LAT style
valve covers you may have clearance problems. I make billet aluminum
valve cover spacers that attach to the head with RTV and accept the
old thick cork gaskets RTV'd to the valve covers. The spacer has a V
shaped ridge facing up to "bite" into the cork seal. A light coating
of grease allows repeated separation at this interface, so it's
typically a permanent, reusable solution. My spacers are .200 thick
and the gaskets are about .160 before being bolted down. This gives
proper clearance for the valve train yet they fit under the stock
firewall. Best way I know to measure this clearance is modeling clay
or you will find the scraping/rubbing marks that are there by now if
you heard noises. I use these on all of my crate engine installations.
Tom Hall
ModTiger Engineering LLC
www.tigerengineering.net
Tigers@autox.team.net
http://autox.team.net/mailman/listinfo/tigers
http://www.team.net/archive
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