Sunbeam Rapier Owners Club
Sunbeam Rapier Owners Club
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List

* Forum Code is ON
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File


T O P I C    R E V I E W
jimlagos Posted - 11 Jan 2016 : 10:28:39
My newly bought series V seems ok so far.Small niggles are sorted, except for a "tapping" sound on tickover, when warmed up. I suspect, from where it seems to be loudest, a problem with a cam follower. Before I look closer, can anyone tell me if the cam and followers from a series IV 1500 engine are the same as the newer 1725cc. I have a spare engine from the barn find car which could be a source of required parts.

14   L A T E S T    R E P L I E S    (Newest First)
jimlagos Posted - 25 Feb 2017 : 13:22:02
Peter's information (as usual) was spot on! I bought the timing cover kit from Alpine, as suggested. It came with a sleeve to put on the old pulley and new oil seal, along with a "rubbery" re-useable gasket, it is the dog's. No sign of any oil around the front of the crank now. Can recommend it to anyone with the same problem. Trouble is browsing their other items for sale was like being in a chocolate factory and very tempting.

pruyter Posted - 16 Dec 2016 : 14:09:53
Hi Jim,

Indeed there is a conversion to a proper oil seal. Some years ago this conversion was only in the USA to get, but now you can buy this conversion from Jerome Senn and you can look up this on his website
Some months ago I installed this conversion on my brothers Sunbeam Alpine and I have a set lying in my garage as an option for my Rapier.
The engine blocks were painted black.


jimlagos Posted - 16 Dec 2016 : 12:14:13
Well! I've got the engine out to change the cam. Cam found in Holland, thanks to Peter, he suggested a company over there and I bought their last "new old stock" cam. They are very rare, I found out.
Looking at the engine (in bits on the workbench) The oil "seals" front and back of the crank, are just worm drive type with oil thrower. Both are leaking a very small amount of oil. Is there a conversion to replace them with a proper oil seal? Also after re-assembly, what colour did they paint the blocks, back in 1967?
Thanks for all your help, advice and sympathy so far!!

jimlagos Posted - 22 Jan 2016 : 20:20:05
Thank you Glen.
I've bought new cam followers, no problem, but camshafts seem very elusive! I can refurb an existing one through a specialist workshop, who reprofile and harden the cam. Quite expensive and takes a long time. I'm reluctant to take out the existing one although it has signs of picking up on a couple of lobes. I'm intending putting the new followers onto the old cam, just to get me through this season. Last year I attended most fairs and shows in this area, and only clocked up 1100 miles, so it should survive. In the autumn, I could remove the cam to get it refurbished, or find a spare cam earlier, so it could be serviced earlier in the year. So I'm still anxiously searching for a cam, new or old, even if it's only on loan.

bigt80 Posted - 21 Jan 2016 : 18:22:15
May have something knocking about. Will let you know, but don't stop searching yourself! Cheers. G.
jimlagos Posted - 19 Jan 2016 : 12:51:00
Well! I went for it, but somebody richer than me seems to have won it!
I really thought £100 would get this item, however it didn't. If anybody has even a worn camshaft, I'd love to hear from them, as I intended to have it re-profiled and case hardened, then use it to replace the slightly worn one in my engine. New cam followers were no problem to buy, but they'll soon expire on the old camshaft.

pruyter Posted - 12 Jan 2016 : 11:43:26
Yes Jim that's the one!


jimlagos Posted - 12 Jan 2016 : 11:09:51
Thanks Peter
Would this be the one you mean?

pruyter Posted - 12 Jan 2016 : 11:01:15
Hi Jim,

From todaay there is on Ebay on offer a camshaft for an 1725 cc Sunbeam Alpine (start bid 20 GBP) which is the right camshaft for your Rapier. Also on offer is an engine block for a Hillman Hunter (Buy it now 200 GBP) which has also the right camshaft for your Rapier.


pruyter Posted - 11 Jan 2016 : 14:47:11
Hi Jim,

even when the engine of your scrap engine has an alloy head the camshaft will only work in your 1725 cc engine when it came from such an engine. Both the 1492 cc and the 1592 cc engines have different wheels that drive the oil pump.
So check the engine number which can be found just above the petrol pump, this number will tell you what kind of engine you have.

jimlagos Posted - 11 Jan 2016 : 12:52:38
I recently set them with a dial gauge, thereby allowing for wear. Unfortunately the sound is loudest down behind the cam follower cover plate.

JPSH120 Posted - 11 Jan 2016 : 12:49:33
Jim, when were the valve clearances last checked/adjusted?

This could well be the cause of the tapping noise. Depending on what mileage the engine is on, the clearances should be set slightly tighter than the workshop recommendation to compensate for wear.


jimlagos Posted - 11 Jan 2016 : 12:47:33
Thanks Peter
I might have my facts wrong! The barn-find Rapier Series IV that I've broken for bits, has a Alloy head! I assumed it would be a smaller cc engine, but perhaps I'm wrong? The engine ran, but the block was cracked, (I'm getting experienced with cracked blocks) and the head had been over machined, resulting in a silly compression ratio. The engine is effectively scrap, but hopefully a good source of spares (I hope)

pruyter Posted - 11 Jan 2016 : 10:46:31
Hi Jim,

the answer is: they are not the same! To start with the wheel that drives the oil pump is different and the second difference is that the cam of a 1500 cc engine is a cam for a cast iron head and this head has a different sequence regarding the inlet and outlet valves.
New camshafts for 1725 cc engines are very hard to find which is not the case for the 1592 cc engines as I have experienced. If you need a new camshaft there are two options: number one is to let your camshaft fix by an expertshop and number two is to use the camshaft of an used engine from the Arrow range (Hunter type). In regard to the second option be aware of that you need the camshaft of an engine with an alloy head.



Sunbeam Rapier Owners Club © 2009 Sunbeam Rapier Owners Club Go To Top Of Page
Snitz Forums 2000