Cam identification

[jus]

Hi all.
I removed the cam cover from the the Fulvia at the weekend to see what was what in there. I found that 2 inlet and 1 exhaust gaps needed adjustment, but the real reason was to see what cams it had. Can anyone tell me the usual places (if there are any) of where to find the engraved ID information? I have to say, nothing was leaping out when I was rotating the engine to check the rockers.

Also - I noticed that one pair of rockers covering no. 3 and 4 exhaust, could be moved along the rocker shaft (maybe 2mm gap). The other 3 pairs of rockers have spring washers holding them in position, but the pair in question doesn't have. I'm wondering whether I'll find something in the sump.

Thanks for any advice.
Justin.

[nistri]

The safe mode of cam identification is to take them out and measure the lobe size.
Spring washers should always be there to prevent excessive sliding of the rockers and thus valve problems. It is weird though not unsual to find Fulvias with cams of mixed origin Andrea

[jus]

The ones that I'm trying to identify are in the works car with engine 14 (chassis 2263). I'll try and get a couple of pics at the weekend showing the cams - and the lack of spring washer between the 2 rockers.

I have a few spare sets of cams which I'd also like to identify. One set has P & T in the casting, and then 159B 3/06 engraved on one end. Does that ring any bells with anyone? I've had a quick search on the net but drawn a blank.

Thanks,
Justin.

[lancialulu]

P & T I believe is the std 303 cam used in 540 and 740 as well as s2 1300. Var 1016 cams have no idents other than a cast square section ring at the end.

[Charles Frodsham]

Hi Jus

Whilst you have the cam cover off, check the oiler nozzle is intact at the bottom of the timing chest. Lots of threads on this.

Charles

[jus]

Hi Charles. I've had another look, and I do seem to have an oiler nozzle. I've attached a couple of pics showing the cams in-situ and the only mark I can see on them - in case anyone recognises them.

[jus]

Just a quick update. I've measured the lobe height of the cams fitted to the S1 (works) car as being 6.5mm. I've got another couple of spare sets. One measures 6.15mm (I guess these are standard?) and the other measures 6.75mm.

I've made a timing disc that fits to the crank pulley - and as the radiator is coming off anyway, I'll be able to access the pulley much more easily. I'd like to have identified these 6.5mm lift cams before checking the cam timing ideally - so if anyone can id them from that measurement - then it would be much appreciated.

Omicron recommend 109 degrees for max lift on both inlet and exhaust - but I think that may be for their own cam design. Does anyone have any advice on what the 1016 should be set to (if that's what they are)?

Thanks,
Justin.

[lancialulu]

are the lobe widths the same.

my data has std 303/1.6hf/1600 cams as 64mm lift and var 1016 as 6.45mm (not a lot more). dont forget the multiplier of the rocker.. If fitting higher lift chk for piston valve clearance!!

[jus]

Thanks Tim.

I measured off the top of the follower, so it should be a 1:1 measurement. Is the max lift rotation angle that is recommended for inlet and exhaust, independent of cam type? I was assuming that the lobe profile might vary from cam to cam model, but that they would be centered at the same location on each different type. Is that a fair assumption? Otherwise - I don't feel like I can check or set anything on these cams unless I can positively identify which ones they are. Can anyone advise?
Thanks,
Justin.

[lancialulu]

Thanks Tim.

I measured off the top of the follower, so it should be a 1:1 measurement. Is the max lift rotation angle that is recommended for inlet and exhaust, independent of cam type? I was assuming that the lobe profile might vary from cam to cam model, but that they would be centered at the same location on each different type. Is that a fair assumption? Otherwise - I don't feel like I can check or set anything on these cams unless I can positively identify which ones they are. Can anyone advise?
Thanks,
Justin.

typo 64mm = 6.40mm.... 109mop is for the std cam. Var and others have higher mop for inlet and lower for ex. By c3deg. These cams are generally symetrical. Bear in mind clearances need to be deducted from lobe measurements.