I have my doubts as to whether you could persuade a Dynastart to run backwards.
JayTee
Nullus Anxietus
Getting involved in discussions is the best way to learn.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
I have my doubts as to whether you could persuade a Dynastart to run backwards.
+ 2016 D4 TDV6
OK, that's fascinating.
Couple of questions.
1; Will it start like that?
2; What happens if you open the throttle?
I'm tipping the answers will be;
1; No, and
2; It will stall.
I have seen engines "diesel" before, and I suspect that yours is doing just that. Happy to be proven wrong, as I love to learn.
One thing though; will it do that backwards? I'll bet not.
JayTee
Nullus Anxietus
Getting involved in discussions is the best way to learn.
2000 D2 TD5 Auto: Tins
1994 D1 300TDi Manual: Dave
1980 SIII Petrol Tray: Doris
OKApotamus #74
Nanocom, D2 TD5 only.
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
Haffie motors will run and last fine if not driven to their limits all the time,
They are well known to drop valves if driven hard .
Not possible for a Haffie motor to run backwards for any lenght of time.
Raising a rocker cover oil return pipe and therefore the oil level in the rocker cover reduces valve trouble under duress.
Think of early Volkswagon Kombi vans..........people would load them up a drive them over the Nullabour in 35 degree heat at 100 kph and they would drop a valve.
Same motor in a Volkswagon beetle never had the dropped valve issue.
The little motor in the Haffie works hard.
Every time I have seen one driven hard sooner or later goes bang.
Ex aussie army ones with the little belt driven governor on them and working with the extra air flow and oil cooling would last forever if the oil level and changes were kept up to it.
The motor design If memory serves me correctly as standard is 643cc and 24 bhp single thoat carby and 27 bhp dual thoat carby at about 4600 rpm which is about as hard as you really want to go on a 1950s design push rod engine meant for a scooter when designed and that horse power was never meant to be sustained on a scooter, let alone later uses for that motor in a
Puch car and Halfinger.
If driven as designed.......great motor.........if driven to its limits or hotted up its not so good.
The haffie motor wass designed in the 1950s ,in the haffie was governed and only had a 30 odd mph road speed.
That never happens these days as the haffies are driven to suit more modern times in countrys with hot climates and more open spaces than Austria.
Govenors were fitted to the haffie motors so they could not go bang
How many owners run the belt on the govenor?...............none.
Aussie army testing for our climate suggested the cooling mods for aussie army models.
Good background - the car in question is not on the road and is undergoing a rebuild and the engine was just being started in the vehicle in the workshop. The owner is in denial on what occurred - also a concern the owner has not looked for, nor found the bit from the broken spring. Hopefully it fell out when the rocker cover was taken off but he did not realise the spring was broken.
InkedBroken Spring_LI.jpg
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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