Just need some clarification, I rebuilt my engine type 1 1600cc standard but twin ict34 webers and big bore twin box exhaust. I have ran the engine in, approx 6 to 700 miles and all good, engine runs fine but since the weather has warmed up I have noticed the engine is running noticeably hotter! Previous after a run of an hour or more the dip stick was no more than warm to the touch, now it is hot to the touch, I can still hold it so not mega hot but still hot as opposed to warm. I have electronic ignition, redid the tappets also lagged both the J tubes ( I have J tubes rather than heat exchangers). After I did it I went for a run and I thought the dipstick was cooler but drove yesterday in the heat of the day for about 45 mins and when I stopped I checked dip stick immediately and I could hold it but it was hot as opposed to warm! Am I worrying about nothing or should I do something about this before my first long run!! July 11th North Devon from Northampton Thanks in advance Andy
was it hotter after lagging the j's? i'm wondering why you did this? i'd imagine the heat will dissipate faster if they are open to the air......
Pop by my place and I'll lend you the digital temp meter, you can test it as much as you want then and make an informed decision.
I have just rebuilt my engine 1641 with twin ict 34 webers standard exhaust and was concerned about engine temp. Is the digital temp metre you use a probe type that you put in place of the dip stick if so what reading should you be seeing. Thanks
No, I have a permanent engine probe on Ted, the one I lend out is a laser jobbie so that you can take temp readings from all over the place, running or not.
Not noticeably hotter with the lagging, initially felt cooler but not sure if that is to do with re setting the tappets or not!
That is really kind thanks! did you say they cost £20:00? Just thinking if so it will be cheaper for me to just buy one! Also then I can regularly check the temp! What should the running temp be between?
I have a jam thermometer! What would you do? Just stick the tip into the dipstick hole? What temp should it be please?
You want it the length of the dipstick so it gets the oil temp I have a gauge and it's at 90 to 100 at 55 mph rising to 110 if thrashed I have read that up to 120 is fine
Thanks Matty, so if I go on a run then stop take the dipstick out shove the temp gauge in, as long as under 110 that should be fine shouldn't it?
I have read some bits that say 130 is ok but to start slowing down, there doesn't seam to be a official figure If you want to get into the whole worry gauges I also have a pressure gauge and find this useful as you can tell when it's getting hot as the pressure drops
As long as you can hold it, it's fine - Zed's right. After a long run, giving a 1600 a good caning, oil temps up to 120º are normal. 110º is a bit on the cool side for long runs. Stop worrying!
My understanding is automotive engine oil is designed to operate at a running temperature of 80 C so the additives can do their job. Running oil temperature should be about this (or 180 F) and at that the head temp on an aircooled engine is usually about 120 c (250 F) the head temp will change quicker than the oil temp as you put the foot down. I love my worry gauges I find them reassuring.
That sounds low to me. My understanding is that the ratings of multigrade (15W/40 etc) are at 0º and 100ºC anyway, so unless your oil's hitting 100ºC, it's not really up to operating temp. Low operating temps not good as they'll fill your engine with acidic muck, as the oil's not up to temp.
