£59.22 exc vat
£71.06 inc vat
In stock
See C-AJJ3325EVO with limited stretch race quality chain.
If you are working on your engine and you want to do it correct think about the timing gears and chain wear. People often spend a lot of time choosing the camshaft and then ignore the exact reason they spent so much time on selecting the cam. Driving the cam and controlling the timing relationships between the cam and the crank is what camshaft drive systems are all about. It makes no difference what the cam does if it does not do it in sync with the crank and pistons. The standard system on many 848, 948, 998 and 1098cc engines is a single chain drive between the crank and cam. The 'S' and some 1275 have a much better "duplex" chain. But even those do wear out. The best judge is to check it while you are taking it apart. With the timing cover off the engine rotate the crank a slight amount back and forth. The camshaft must move the exact distance at the same instance.
Fitment of an uprated cam drive system is essential when building a performance engine. Timing scatter induced by the standard set up can reach up to 15 degrees once the single row chain has stretched, which it does after only a few miles. This scatter not only affects the cam timing, but also the ignition, the distributor being driven by the camshaft. Power loss suffered by this phenomenon is substantial. Replacing the standard single row (simplex) system with a dual row (duplex) system greatly reduces the problem; use of a toothed belt system all but eliminates it. The belt system vastly reduces valve train noise and also helps damp out some of the odd harmonics generated by the 3 main bearing 'A' series engine. It is also extremely important to time any cam in to its required setting to obtain maximum performance, especially with performance cams. The 'dot to dot' method can, because of manufacturing tolerances, be out by as much as 15 degrees. Anything above 2 degrees out and power suffers, most noticeably in small bore engines. In race engines you probably lose 1 hp for every degree the cam is out, more when over 6 degrees.
£59.22 exc vat
£71.06 inc vat
In stockRecommended usage 1 x C-AJJ3325 to fit one mini.
Timing cover gasket with 11 holes for cars with timing chain tensioner bulge as standard on all A Plus. We recommend fitting the more expensive original genuine type with anti leak seal for longevity see GUG705550GM.
Pre A plus ...
Genuine Mini Spares Original black timing cover oil seal for all A series until the introduction of a new type of lip seal introduced in 1991 mainly for injection engines, when they changed to LUF10006--albeit many owners fit this not kn...
Mini Spares Non genuine timing chain gasket fitted to every BMC A series engine with 10 gasket holes until the introduction of the A plus type which had a bulge in its side where the tensioner was fitted which had 11 holes.
Gasket material h...
Timing cover front plate and tensioner plate bolt and washer kit. Comes with all parts to fit the cover except for the counter sunk screws if fitting a duplex kit (our duplex kits all come with these).
Rota slide adjustable duplex gear set.
The 2 wheels and chain weigh 1.379 kilograms and the cam gear is 680g.
Requires 2 x AEA687 countersunk screws (not included).
Cam gear bolts should be torqued t...
Ultra light non-adjustable steel duplex timing gear and chain set with locktab and countersunk screws but with a 2H4905EVO limited stretch race quality chain.
If you are working on your engine and you want to do it right then yo...
Countersunk screw for holding the front palte to the crankshaft bearing cap on cars fitted with duplex gears to give the clearance required. 2 required per car.
If you are replacing your timing chain or just doing routine maintenance a new locktab is sure to come in handy.
For race quality chain see 2H4905EVO.
It only makes sense that if you have your engine out of the car that you replace the timing chain. The chain controls the timing of the camshaft and even a slight amount of wear or stretch c...
Timing cover front plate and tensioner plate bolt and washer kit. Comes with all parts to fit the cover except for the counter sunk screws if fitting a duplex kit (our duplex kits all come with these).
Race quality heavy duty double row performance endless timing chain. It is the best chain available and used by top engine builders, also fits MGB/Midget. This chain is for duplex gears that is used by racers as a limited stretch heavy duty version m...
Special superb extra strong timing chain with very limited stretch using modern day materials and technology to keep your timing correct and will fit any A series engine using a single row chain.
This chain saves all the time and effort requ...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
Parts required to stop timing chain rattle on A plus engine with single row chain.Last chance to buy the plate and pin to hold the tensioner as they are
obsolete from Rover.
It is worth the expence to fit MSSK051EVOkit...
woodruff key to fit in the camshaft to hold the larger timing chain gear. See 6K836 for the crankshaft keyway for the lower smaller timing chain gear
Proper timing of the camshaft is very important and while it is easy and nice to do it with a precise adjustable cam sprocket it is also cheap to do it with offset cam keys. 1 or 2 degrees difference in cam timing can make a difference in performance...
RUBBER CHAIN TENSIONER (2 PER CAR) FITS WITH WIDE GEAR ONLY.
Sold singly 2 required per engine.
Mini Spares Non genuine timing chain gasket fitted to every BMC A series engine with 10 gasket holes until the introduction of the A plus type which had a bulge in its side where the tensioner was fitted which had 11 holes.
Gasket material h...
The screw that holds the drum on the hub. Earlier hubs had two screws, many replacements have only one, all that’s needed.
Lightened cam gear duplex timing gear and chain set. Not recommended for race/rally applications. approx 69-70g 9% lighter
General: Camshaft Drive Systems
For highly tuned engines always use steel duplex as cast is nowhere as st...
Genuine Mini Spares Original black timing cover oil seal for all A series until the introduction of a new type of lip seal introduced in 1991 mainly for injection engines, when they changed to LUF10006--albeit many owners fit this not kn...
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