that's the whole exhaust system yes lol
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The 1957 Dope Dauphine
- Thread starter Adey
- Start date
that's the whole exhaust system yes lol
I see the pigeons have been out in force!
The last of my bits turned up today so i got them fitted. Wiring finished and the temp switch for the rad fan fitted. Tested it at idle and allowed it to warm up and cool down over a few times over. Working great so really happy with that.
Then on to the oils. Engine oil dropped, filter changed and new oil in. Gearbox oil was another story, took about 2 hours to gravity feed it into the box. Still filled up and all good.
Right onto the test drive, its pokey and goes very well doesn't feel too bad at all. Pulls very cleanly in all 4 gears and is probably at the limit of the chassis and brakes that are on there. Only down side is it runs very hot. No leaks, no over pressurising runs very well, no smoke and no mixing of oil but when cruising along it gets hot enough to keep the fan running, so it 92+ degrees. If you pull over and idle itll drop back down on the fan. Anyway a quick chat on the drive with the mechanic neighbour and hes going lend me his timing gear and comp tester again just to set everything up. Ive just twisted and turned the dizzy till it started and left it there. His suggestion was the timing being out followed by carb jetting thought the carb looks to be an renault 8 item. I decided to do a quick search of a french renault 8 website and low and behold the first hit that came up for "température du moteur" was a chap with an r8 whos car was running very hot, fitted a new rad, cowling and electric fan only to find his timing the issue. Maybe and fingers crossed the engines are just a little sensitive to timing.
7 Mile test drive and it hasnt blow up yet.
Then on to the oils. Engine oil dropped, filter changed and new oil in. Gearbox oil was another story, took about 2 hours to gravity feed it into the box. Still filled up and all good.
Right onto the test drive, its pokey and goes very well doesn't feel too bad at all. Pulls very cleanly in all 4 gears and is probably at the limit of the chassis and brakes that are on there. Only down side is it runs very hot. No leaks, no over pressurising runs very well, no smoke and no mixing of oil but when cruising along it gets hot enough to keep the fan running, so it 92+ degrees. If you pull over and idle itll drop back down on the fan. Anyway a quick chat on the drive with the mechanic neighbour and hes going lend me his timing gear and comp tester again just to set everything up. Ive just twisted and turned the dizzy till it started and left it there. His suggestion was the timing being out followed by carb jetting thought the carb looks to be an renault 8 item. I decided to do a quick search of a french renault 8 website and low and behold the first hit that came up for "température du moteur" was a chap with an r8 whos car was running very hot, fitted a new rad, cowling and electric fan only to find his timing the issue. Maybe and fingers crossed the engines are just a little sensitive to timing.
7 Mile test drive and it hasnt blow up yet.
binge
Well-Known Member
Quite chuffed its got this far
Ive been doing some more reading, quite a few post on the Team-R8 forum where otherwise healthy good running engines are running hot due to the timing being out. Hopefully its an quick and easy fix.
Reference post
R8 - Engine 956 and 1108
Temperate countries
Opening start 84 °
Full opening: 94 °
Hot countries
Opening start 73 °
Full opening: 83 °
R8G - 1100 and 1300
Opening start 73 °
Full opening: 83 °
R5A
Opening start 86 °
Full opening: 92 °
R12
Temperate countries
Opening start 89 °
Full opening: 100 °
Hot countries
Opening start 75 °
Full opening: 87 °
R18 - 1400
Opening start 86 °
Full opening: 100 °
Super 5 - 1400
Opening start 86 °
Full opening: 100 °
R8 - Engine 956 and 1108
Temperate countries
Opening start 84 °
Full opening: 94 °
Hot countries
Opening start 73 °
Full opening: 83 °
R8G - 1100 and 1300
Opening start 73 °
Full opening: 83 °
R5A
Opening start 86 °
Full opening: 92 °
R12
Temperate countries
Opening start 89 °
Full opening: 100 °
Hot countries
Opening start 75 °
Full opening: 87 °
R18 - 1400
Opening start 86 °
Full opening: 100 °
Super 5 - 1400
Opening start 86 °
Full opening: 100 °
So ive had a good crack at getting it to run cooler. I'm wondering if the fact the original engine ran a mechanical fan is causing an issue?
Timing was checked, adjusted a few times and then set to 6 degrees. no change to temp on the dash in any setting.
The dash was obviously designed for a dauphine with the sensor in a different place so maybe reading very differently. It used to be in the top of the radiator and now its in the heads water flow about an inch from the cylinder top.
My rad fan cuts in at 92c (this is currently my only way to judge engine temp accurately) ive just checked the thermostat and that starts to opens at 89c so isnt fully open until 100c so i've ordered a lower temp item (that said my boiling temp should be about 120ish). I've found the info regarding the oem renault 8 stat and it starts to open at 84c and is fully open at 94c. Now I'm wondering if i have under specked the fan switch? In my head you wouldn't want the fan running every time the stat was fully open or would you? Wouldnt you want a few degrees of room on that too? If anyone could chime in on this that would be great?
there seems to be no air in the cooling system at all, I'm confident its bled up well.
The car runs really well, no issues at all. No mixing water with oil or smoke out of the exhaust. The water/antifreeze mix keeps its colour and the hoses don't go bar hard or swell as if taking in combustion pressure.
I think i really need to sort a better way of measuring the water temp, I'm wondering if i actually have a cooling issue and am just flapping for no reason?
?
Timing was checked, adjusted a few times and then set to 6 degrees. no change to temp on the dash in any setting.
The dash was obviously designed for a dauphine with the sensor in a different place so maybe reading very differently. It used to be in the top of the radiator and now its in the heads water flow about an inch from the cylinder top.
My rad fan cuts in at 92c (this is currently my only way to judge engine temp accurately) ive just checked the thermostat and that starts to opens at 89c so isnt fully open until 100c so i've ordered a lower temp item (that said my boiling temp should be about 120ish). I've found the info regarding the oem renault 8 stat and it starts to open at 84c and is fully open at 94c. Now I'm wondering if i have under specked the fan switch? In my head you wouldn't want the fan running every time the stat was fully open or would you? Wouldnt you want a few degrees of room on that too? If anyone could chime in on this that would be great?
there seems to be no air in the cooling system at all, I'm confident its bled up well.
The car runs really well, no issues at all. No mixing water with oil or smoke out of the exhaust. The water/antifreeze mix keeps its colour and the hoses don't go bar hard or swell as if taking in combustion pressure.
I think i really need to sort a better way of measuring the water temp, I'm wondering if i actually have a cooling issue and am just flapping for no reason?
Ive been chatting with a chap on the thread i have on retro rides who has been going through a few things with me. First off i need to prove how hot the water actually is. Looking into it the early 4cv/dauphines didn't run a stat and the later ones had one that ran circa 75c so middle of the dash gauge would be close to that. My engine runs about 20c hotter looking at it so it makes sense that the gauge is now reading hotter and thus i might not actually have an issue. I should also have a rad fan that cuts in a few degrees above the fully open thermostat temp so my 92/82 temp switch might actually be a touch too low. He seems switched on about it all and spent years testing and developing cooling systems for an OEM supplier. He did note that the more modern rad i have probably isnt as effecient as the old brazed type i had based on its placement where normally they are at the front of the car with high pressure ahead of them.
DaveL485
Staff member
Edited.
As I cant sit still waiting for bits to arrive I thought I'd test out adding a bigger scoop under the car. Quickly thrown together with some spare metal. I'll probably make it nicer if it helps out. Whilst there I also realised the original engine had a lower tray too that blocked off either side of the engine to the floor. They arnt the correct shape anymore but I can probably trim them abit to make them fit. Maybe they have some effect on the flow through? I'll take a look at them this afternoon.
So i have today, fitted a bigger scoop underneath, fitted all the engine cowling and on the dash it shows no different when running down the road. So its either ok or overheating but i dont know which lol. Its good to have it all in to hopefully improve the efficiency of it all but im really clutching at straws until the other stat and temp probe turn up and i can check things properly.
As i side note i fitted a 6mm (smallest i could find) restriction in the hose to the header tank which made no difference on the gauge so i then clamped the hose closed and drove and again made no difference to the dash running temperature. I will leave the restrictor fitted to limit flow to the header tank to force it more towards the radiator.
As i side note i fitted a 6mm (smallest i could find) restriction in the hose to the header tank which made no difference on the gauge so i then clamped the hose closed and drove and again made no difference to the dash running temperature. I will leave the restrictor fitted to limit flow to the header tank to force it more towards the radiator.
You tried just putting the sensor in some boiling water to see how hot it translates to on the gauge..?
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