Motor Rebuilds – Rebuilding a Lotus Twin Cam
The Ford Lotus Twin cam, the famous large efficiency motor of the sixties period. The Mk1 Twin Cam was released as a exam mattress motor in the Mk1 Cortina in 1963 & adopted by the Mk II which powered the
Mk II Lotus Cortina – the exact motor that was also equipped to the 1968 escort in Washington DC Twin Cam.
The lotus Cortina & the Twin Cam escort in Washington DC had been prompt winners equally on the observe and in a lot of, lots of rallies held during the world. It is frequently said that the sixties were being the golden many years of motor sport, and the organization of lotus and their very aggressive cars and trucks have been held in high esteem. But the Lotus elan which was publicly introduced at the1962 Earls Courtroom motor exhibit was the sporting activities car or truck that set the motoring earth alight, the elan recognized a reputation for rapid level to stage motoring, as well racking up success soon after achievement on race circuits all around the earth. Lotus was quick to develop on those people achievement with the launch of the lotus elan 26R, the racing model, which was based on the elan S2 product, only about one particular hundred 26Rs elans were being made by the manufacturing facility.
The run of the mill four cylinder ford solid iron motor block supplied the base on which the twin cam motor was constructed, the cylinder head was a Harry Mundy created twin cam alloy head, which incorporated chain generate to the twin over head cams, which actuated the 8 valves. The engine was typically aspirated and fed by ‘twin forty millimetre Weber carburettors, which are characterised by the distinct clucking seem they designed when the throttle butterflies are opened.
But even with the significant electricity output of this tiny 4-cylinder engine there are two Achilles heals of this engine, the first remaining the reputation for drinking water pump failure, which is largely prompted by the motor remaining left standing for extended durations sans any coolant in the block, on the first crank of the engine the dry seal is ripped through the 1st switch over.
Numerous elan & escort in Washington DC entrepreneurs have also upgraded from the initial dynamo to a modern alternator for the electrical process, the large pressure on the belt demanded to operate the alternator spots excessive aspect masses on the h2o pump which can direct to untimely failure… the conventional water pump replacement demands that the alloy twin cam cylinder head be very first taken off, this can direct to a pretty pricey mechanical restore for the non-sensible twin cam operator
The ideal fix for this issue is to put in the newer modular sort water pump, generating it significantly simpler to get rid of and switch. The other problem with the twin cam lotus motor is the continual habit of the motor of dropping oil stress on limited proper hand turns, several owners decide on to disregard this problem at their personal peril, lotus twin cam
motorists have been known to simply listen for the bearing rattles then’ back off, and wait for oil strain to return…. if you hear bearing rattle, the engine is only a handful of seconds absent from a opportunity motor blow up,
From a chilly start out, bearing rattle can be tolerated in an motor since it only lasts for one or two seconds though the engine is at idle., but it is an entirely different story when the engine is revving at 4 to seven thousand revs for every minute wherever even a quick oil hunger period of time can have a devastating influence on the motor bearings, bearing failure is not an if, but a subject of when the engine bearings seize on the crankshaft.
But You’ll Be Happy to know there is A Fix – But there are truly only two choices
1: If you are into circuit racing, then dry sump lubrication is a supplied, it can be expensive and time consuming to set up and to get it correct, but most racers swear by dry sump lubrication.
2: Set up A Gated Soaked Sump Oil Regulate technique.
It appears technical but it is not, the gated sump technique is composed of designing and creating a exceptional equipment which is put in in the common twin cam sump or oil pan, it is not high priced to make or difficult to fabricate, it is not advanced, and most household mechanics would be able of creating the baffle if they love fabricating with sheet metal, and they also fully grasp how to do a modest amount of brazing.
No a person but you will at any time know that there is a unique anti surge oil control system installed in the sump of your twin cam lotus motor. But the big difference is that with the gated baffle put in, you will be in a position take any given corner at higher speed in your Ford escort in Washington DC, Lotus Cortina or lotus elan and not have the slightest stress about oil surge, the oil gauge will convey to you that the proper oil stress is being sent to your famous twin cam lotus motor, it is really about piece of brain and self esteem with substantial effectiveness motoring. Create it as soon as, build it suitable, and you can have no problems.