Scarab the Rover..

harveyp6

Well-Known Member
#21
That earth strap is non standard, and not connected to the positive side of the coil, so will have no effect other than being an engine earth.
 
#23
There is a little earth wire in the distributor which is worth checking. It normally runs from one of the fixings for the lower plate to a screw somehwere on the upper, moving plate. The wires tend to fraey inside the end fittings so visual inspection isn't enough. You have to actually tug on the wire and ensure it doesn't pull apart.

With regard the tacho you can disconnect it and join the two wires together and run the engine. That will tell you if the tach is your problem. You can also check to see if the case is earthing anything out at the same time.
 
#25
If the car runs ok but just has a crappy idle or off idle i'd be looking at the carbs. particularly their balance and idle settings. it isn't unusual for the idle locknuts to come loose and close one carby down at idle. setting them is similar to A series SUs but you need to check that they are both working first. Easiest wasy is to remove the elbows and look don the throat on either side. If the slide is shut on one side then that will be it. you can use the lift pin to check that the slide is actually working and not sticking at bottom points.
 
#26
So i rigged up a extension lead from the boot so i could put my timing gun on. I found the car running at 40 degree BTDC!

I have set it at around 6-8 degrees and the idle has calmed down a bit. Only thing i can do is road test it. Here goes......
 
#27
i took the car for a run after setting the timing yesterday and have noticed a difference. When sitting under a railway bridge, the revs were lower and all i could really hear was the ticking from the back corner. (suspected worn camshaft as mentioned by you lovely lot). That will have to be put on hold as it's not annoying loud. I was off to see a mate to borrow his garage pit.

When over the pit i had a good chance to see underneath. I found 2 things that need attention. The sump gasket is leaking and spraying oil backwards. (i got a new rubber sump gasket with the car. i wonder why) and the engine mounts look past there best. I guess this would enhance the engine wobble a little. The rubbers are on order.

So next weekend, a mate (who knows alot better than me) is coming over to look at the carbs and fuel mixture. He'll also recheck the timing. 20220924_155203.jpg 20220924_154917.jpg
 

cobraboy

Well-Known Member
#28
The ticking from the back corner could be a blowing exhaust manifold at the head.
To find out which cylinder is lazy use an infra red temp reader on each manifold branch near the head to isolate a cooler one.
 

quattro

Administrator
Staff member
#30
So i rigged up a extension lead from the boot so i could put my timing gun on. I found the car running at 40 degree BTDC!

I have set it at around 6-8 degrees and the idle has calmed down a bit. Only thing i can do is road test it. Here goes......
I checked my timing pointer and found it was 8° out. Have you checked the TDC mark is accurate?
 
#31
No. In all honesty, I wouldn't know how. I only set the timing by reading the instructions. This is why a mate of mine is coming to look at all this. Hes a busy man so I have had to wait 3 weeks. It will cost me a slap up meal but hes the best I know who is local to me.

I'll ask him this question.
 
#34
so today after waiting 3 weeks, my man came over to take a look. 1st job was to fit the new complete electronic dizzy. That wasn't as straight forward as it sounds. Anyway, its on and the car starts easier. Why is the dizzy clamp and 9/16 nut so difficult to fit? Maybe my fat fingers?

Onto to the carbs. Well the LHS carb (1357) was well out. So after adjusting, it ran smoother. The idle wobble has got less now. The throttle response better and now it idles at around 700rpm nicely. I think the little wobble isn't helped by the fact the engine mounts are knackered.

A little run of 30 miles told me one thing. These cars are underrated.

So i am off to collect parts next week for my 5 speed conversion. Car is safely in the dry now and i am not drowning my sorrows for once.
 
Top