Guarantee it’s a bent valve or a damaged guide, there’s various ways to tell but I’ll almost guarantee you won’t find it by looking with the naked eye. The search function is useful at the top of the page or I’ll try write up my own way of finding bent valves later when I have more time.

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Team Running Engine again!
Team Negative Camber!
My Budget track engine build thread!
Now appearing at a Trackday near you!!

Ok thanks for the replies. I’ll strip the head and see how the valves look.
So is the tapping caused by excessive clearance that the lifter can’t take up or is it from the valve not closing on the seat squarely?

I’m waiting on a new spring compressor to get the valves out and I can probably get access to a lathe in a week.
Does anyone have specs on the installed valve stem height and a spec for head thickness?
Thanks again.

not sure on the specific installed height, but I do recall my piper double springs went in on standard retainers and standard valves after only light work to the seats and no shims!

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

All the exhaust valves look ok but I need to clean things up and check properly. The head thickness looks ok too going off the above diagram.
The valve guides look to have a bit of wear.
Does anyone know the process needed to replace them? I assume you have to warm the head up to a certain temperature and press them out?
Thanks.

heat would make it worse! they are just pressed out, press new ones in and line bore/hone to suit

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Does anyone know the the valve lift at tdc for standard cams? Also 5* atdc would be handy if you have any specs. I’m just trying to figure out piston to valve clearance.
Thanks.

Thanks for that. I read through it but I didn’t find a spec on standard cams.
Does anyone know how much clearance a stock engine has when new?

anyone else do cams your side of the world? I know most of the uk based companies will grind a profile to spec from a blank, I'd imagine late xu/ew blanks to be quite rare in Australia maybe?!

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

your post amused/baffled me, an aussie using imperial for valve clearances on a French car, when you use Km for distance and speed


0.080 is 2.0mm I think, far too much for a standard piston especially if it has been skimmed and a standard gasket.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

I thought I better finish this car as it has been a year. I put in 8 new inlet valves and cut three angle seats with a cutting tool from India. It was slow work. Then I tested the springs and shimmed them to get the seat pressure right. (80 lbs seat 200 lbs @ 10mm) I also had to watch for spring bind clearance so some were slightly less than 80.
After fitting the head I pinned the cams and crank and fitted a new belt kit/water pump. I was worried about the piston/valve clearance so I fitted a degree wheel and measured inlet lift (standard cams).
@ tdc =.4mm
6*atdc=.9mm
10*atdc=1.2mm
This is a lot less lift than I expected. This leaves me 1.5mm clearance so it should be fine.
I couldn’t ever find this lift info when I was trying work out the valve clearance at tdc with the head off.
Hopefully it’s useful to someone and hopefully this thing starts up ok after all this time!