What I did was turn it over with no plugs until I had oil at the spraybar (took a while but thats what my knowledgable mate said to do) I did fit new followers with the cam, the tolerances I got from my engine builder who got the cam ground was 12 thou ex, 8 thou inlet unfortunately i work away and have just gone back to work 4 two wks, as soon as I get back ill be re-checking the clearance, it runs well and goes a lot harder than my 6cyl wagon just the clicky noise was pissing me off the cams powerband is 2500-6500 im not 100% but pretty sure the builder woulda give me the "hot" settings

quote:

---

Originally posted by spigot

How did you set the valve clearance, if you used the "hot" settings then it will definitely tap loudly. Otherwise if you actually had a problem of an eaten lobe you would see it straight away in your oil.

You don't really need to break the cam in. Start the engine without the rocker cover and make sure the spray bar is doing its job. Unless you are running heavy valve springs (100lbs +) with really aggresive lobes it would be hard to wipe out a lobe especially on break in. There really isn't anything to "break in" on a follower style cam. Its more important to prime the oil system but how many people do that.

Break in proceedures are aimed primarily at OHV motors like V8's with flat tappet cams. The revs are to ensure sufficent oil pressure and lifter rotation.

I personally have never seen a flat lobe from incorrect break in, only worn out or damaged from incorrect tolerances.

---

so do you reckn that if I recheck the clearances and theyr what I was told 12ex, 8in then the clickys nothn 2 worry about?? it shouldnt do any damege should it ??????

http://www.pumaracing.co.uk/cam1.htm

better have a read of this RE cam break in procedure. explains it pretty well.

i would definately be double checking the valve train geometry and clearances for the clicking noise.

just a thought as its idling use a screw driver as a sthescope and place it along the rocket cover and hear which one's are noisy mark it on a piece of paper and re set those ones hope it helps

If you use the "hot" settings when the engine is cold it will end up being too loose when you check it at operating temp. It will probably need to be about 2 thou tighter when done cold although loose is ok, too tight will hang a valve.

quote:

---

Originally posted by spigot

If you use the "hot" settings when the engine is cold it will end up being too loose when you check it at operating temp. It will probably need to be about 2 thou tighter when done cold although loose is ok, too tight will hang a valve.

---

aaaahhhhh by "hot i thought uz meant best for power[:p] when I get home ill be re3checking anyway ill just muck around with it till its good
does 12thou exhaust & 8 thou inlet sound normal? I cant get in contact with my engine guy but what settings do u guys reckn they normaly give u

Ch 3 of Vizards "How to modify Ford SOHC" has good technical writeup on all aspects of valve and rocker geometry, ch 9 of the Des Hammill "How to Power Tune Ford SOHC & DOHC" book has more of a laymans approach with some detail on rocker geometry and a handy set of templates for ensuring correct set up. Take a look at these sample extracts to see what I am talking about;

http://www.mediafire.com/file/b72h2qb4tb09m90/CH%209%20Des%20Hamill.pdf

http://www.mediafire.com/file/23q21p9wf0yad34/CH3%20Vizard%201.pdf

Definately recommend purchasing both of these books along with a genuine Ford Service manual, the have been a handy reference over the years.

Cheers

well re-checked my clearances were pretty close no major adjustments just minor, still sounds the same could it just be the beefy cam? sounds like a typewriter, what do you guys reckon about just messin with it till it sounds right??

Who reground the cam and are the followers new or refaced? What is the profile? When you check the clearance are you working on a slight drag or a go-no go proceedure?

On a typical solid lifter V8 you can vary the clearance by about 6 thou looser and 4 thou tighter. On a ohc motor they haven't got the same clearance ramps to play with. In reality you would hardly notice any change in the valve clearance from a performance perspective unless the combination was perfectly optimised. You probably have about +-2 thou to play with which will be attributed to "your" feel with the gauges. Some cam profiles can be a little noisier, Comp cam extreme series hydaulics are very touchy to preload and can be tappy. Cams with aggresive profiles can be noisier because they tend to compromise the clearance ramps for higher lift rates.