cliff.b
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Posts posted by cliff.b
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12 minutes ago, johny said:
What pressures do you see on the gauge when hot at 2000rpm and tick over? I used to get the light flickering at low revs on hot days in traffic before replacing bearings/oil pump and improving cooling
Since the tickover has been down to 600RPM the lowest I have seen the gauge show is 10lb. At 2000RPM with the engine as warm as it's going to get in this weather I haven't noticed it below 30lb.
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15 minutes ago, Colin Lindsay said:
Are you really braking THAT hard all the time?
I'm just wondering, if the engine is dropping to 600rpm, then the oil pressure is seriously reduced - nothing to do with braking but that's coincidentally when it happens. Worn pump, worn bearings, the pressure drops as the engine revs drop and correspondingly the pump rotation. Can you replicate it with the engine at normal temperature, maybe after a fast run, and by dropping the revs right down when static?
No, I don't usually brake much at all but I have only seen the light come on when emergency braking from speed. I don't plan to do that on a regular basis (ideally not at all)
Also, as it is only for a second and when the engine is at low revs and no load, I doubt it is any more damaging than a cold start.
My only concern really is if it indicates something not right or the start of an issue so interested in people's thoughts and if others have seen the same thing.
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As there has been some interest in learning when this group are meeting up I will post details of anything I hear of on the "Other Events" page, if that is acceptable?
As I explained previously, it is not a club but has 800+ followers, many of who turn up at the meets and drives which are centered on Peterborough or in a radius of up to about 60 miles.
Typically 2 events a week, every week and the few I have attended attracted 50+ classic vehicles.
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2 hours ago, PeteH said:
Have you thought of swapping out the oil pressure switch?. It would (help) prove the switch itself was not the issue?. Not a common fault, but at least in theory it could be the issue, most have a spring internally which can degrade, and over time oil could byepass the plunger.
Pete
Yes, I thought about that, although not sure why it would cause an issue when braking hard.
Another thing that has occurred to me is that I recently replaced my distributor which, amongst other things, has cured my erratic idling issue. Previously, I had tickover set at just above 1000RPM but now it is happy at 600.
So I'm wondering, as I am effectively making an emergency stop with the clutch depressed, the engine speed is dropping to 600RPM, with presumably reduced oil pump scavenging, while the car is still decelerating hard with possible significant oil "slosh".
Any thoughts?
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18 minutes ago, Mathew said:
A likely story
Ok, maybe I wasn't "forced" to go out again 🙂
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2 hours ago, Pete Lewis said:
think i would disconnect the low press switch and do a brake test if it still lights you have a short in the warning harness somewhere
Pete
Yes, that's a great idea. Why didn't I think of that 🤔
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When I got home after attending this car meet I was forced to go out again in the afternoon with my Wife. Altogether about 3 hours of top down motoring today covering nearly 100 miles on mainly B roads.
My ears have now almost warmed up.
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2 minutes ago, PeteH said:
O M G. Mk1 Consul, and in the same "beige" as the one I had!. And Cortina Mklll Estate!, Ours was red but vynyl roof and all.!!!!. Carried a Mirror Dinghy upon the roof and towed a 14ft Caravan behind!. Notice the "Mod"s turned up!. No "ted`s" (Rockers) on bikes though?.👍🤣
Yes, bikes as well. Didn't see any fighting though.
At least not by the time I left lol
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A few more pics
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52 minutes ago, Dick Twitchen said:
I'm sure it is a Kougar.
Dick
It's a Ronart
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51 minutes ago, RogerH said:
Hi Cliff,
are you sure you do not have the oil level and brake lights swopped over !!!
Roger
Do you mean the light that indicates a fault with the dual circuit brakes? If so my car doesn't have one as it has a single circuit.
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4 hours ago, Pete Lewis said:
i first came across dipstick problems with my Vit6 it let you overfill by over litre
th e 2000 is spot on so its just a thought add what it says see what the stick shows
Pete
It still happened today after I had topped up the oil so I will definitely do as you suggest when I change it next.
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And was admiring this Jag engined kit car when the owner told me he designed it and builds them for sale as kits, all over the world
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I have included this MG because I was surprised to see it had a vintage supercharger fitted.
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11 minutes ago, Mathew said:
That's why, don't do facebook.
If you are interested in going I will let you know when they have stuff on
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It's not a club, anyone is welcome with any vehicle over 25 years old.
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3 minutes ago, Mathew said:
Another one missed, where was it and where was it advertised so others could have joined in?
Mathew, join this Facebook group to find out what's being organised. There is normally a static meet and a drive out (2 events) every week in the warmer months, slightly less when not so warm
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5 minutes ago, Pete Lewis said:
where was this ???
pete
Stibington Diner, an old transport cafe on what used to be the A1 near Peterborough, but now just off it. Will be a regular occurrence here or nearby, probably every couple of weeks.
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Large number of classic cars of various makes & types turned up this morning, including several Triumphs this time.
Great drive there & back in the glorious sunshine 🌞
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22 minutes ago, Pete Lewis said:
is the oil level a bit low then ??? even down to the min mark it should cope with most driving situations
as anything between min and high is supposed to be ok ,
Pete
It was at about 3/4 on the dipstick. If it doesn't do it after I topped it up then I assume it's not an electrical issue but it could be what you suggested, low level due to incorrect dipstick.
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9 minutes ago, NonMember said:
Mine does that, too. Not always, and generally not when the oil level is above the maximum mark, but at 3/4 or below it will. I think it's because the pick-up is towards the rear of the sump and heavy braking can create enough slosh to expose it to air.
Ok, thanks for letting me know. That's either reassuring or possibly we both have something to worry about lol.
Will be interesting to see if it still does it tomorrow after topping the oil up.
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38 minutes ago, Colin Lindsay said:
Enjoy it! Nothing going round here, no-one seems to have even the most basic of plans for the mid-term let alone the long-term. I wish there was something this side of Easter that I could plan for and look forward to.
Bitterly cold here, a breeze picking up but I managed to cut some grass earlier so the smell of petrol was nice....
Sunny and warmish here this afternoon so out for a nice 20 miles or so to nowhere in particular.
Looking good for tomorrow as well so attending a classic car meet in the morning just outside Peterborough and taking my stepson as he has expressed some interest in it all.
Happy to give details of the meet to any other members who may be interested in attending. They usually get a good collection of classics but could do with a few more Triumphs.
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1 hour ago, cliff.b said:
Hmm, that's interesting and would be plausible however, I only have single circuit brakes. Should it be dual circuit on a 78 Spit?
As far as I can see, the Spit got dual circuit braking from FH130000 in late 78, so my one just missed out.
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27 minutes ago, Colin Lindsay said:
Is it possible it's an electric issue ie the connection being broken on hard braking?
I thought about that but as far as I am aware, 12v is applied through the bulb to the oil switch which grounds it, turning the light on. When oil pressure breaks the switch the light goes out but any other break on the circuit would have the same effect.
Although I suppose if any part of the connection between the lamp and the pressure switch shorted to ground then that would light the lamp 🤔
And of course, I have recently had all my dashboard out to refurbish it.
So it could possibly be a short on hard braking.
Oil light on when braking
in Engine
Posted
Pete has raised that as a possible issue. I will check and as he suggested, calibrate when next changing the oil