MakeEverything
|
| posted on 12/9/09 at 08:35 PM |
|
|
Renault 2165cc 8V Engine info needed
Hi,
In my car is a 2.2L 8V Renault engine, which to be honest has seen better days.
Does anyone know if;
The engine can improveon its performance easily?
If the 2.0 12V head will fit the 2.2 block without clearance issues?
What the cause of my oil pressure problem could be?
3 - is probably the vaguest of all of the above, but i will explain;
Oil pressure on cold start is between 4 and 5 bar at tickover, and slowly frops off to around 0.8 once u to temperature. As the engine gets warmer,
the pressure drops off to almost 0 at tickover, and i need to rev it to get it up (ooo errr).
Is this because as the oil warms up it becomes thinner and loses viscosity and as such reduces in pressure, or could this be a different problem? Oil
is new, as is the filter. Maybe slightly thicker oil would be better?
Ive considered the oil pump, strainer on the pickup, and the intermediate shaft, but i dont think that the oil pressure would drop gradually if it
were these, but stay low from the start??
Your thoughts would be appreciated.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
|
|
|
|
|
Chippy
|
| posted on 12/9/09 at 10:41 PM |
|
|
The oil pressure is produced by the bearings within the engine, (mains and big ends), if the bearings are worn you will get reduced pressure as the
oil warms up. Not what you want to hear I'm sure, but that is almost certainly bound to be the reason. Cheers Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
|
|
|
MakeEverything
|
| posted on 13/9/09 at 07:45 AM |
|
|
quote:
Originally posted by Chippy
The oil pressure is produced by the bearings within the engine, (mains and big ends), if the bearings are worn you will get reduced pressure as the
oil warms up. Not what you want to hear I'm sure, but that is almost certainly bound to be the reason. Cheers Ray
I thought the oil pressure was produced by the oil pump, hence the oil pressure relief valve within its construction?
First ive heard that the mains pressurise the oil i must admit....
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
|
|
|
t16turbotone
|
| posted on 13/9/09 at 08:30 AM |
|
|
The oil pump produces flow, the pressure is produced by restiction of the flow. So if there is excessive wear in bearings the oil pressure is
drastically reduced.
|
|
|
cd.thomson
|
| posted on 13/9/09 at 08:58 AM |
|
|
im just here thirding the bearings.
It's why I have a similar (but much milder) issue on my 205, because the bearings are worn after 100k and 22 years! The oil pump was replaced
last year I think, that just keeps it circulating to the top of the engine after it returns to the sump.
The other option is that you have an oil leak or didnt fill it up enough? I know when my pug has burned a noticeable amount of oil because the
pressure is lower than it should be once up to temperature and I get a bit of oil surge.
[Edited on 13/9/09 by cd.thomson]
Craig
|
|
|
MakeEverything
|
| posted on 13/9/09 at 10:11 AM |
|
|
oh, ok, i see now. i misunderstood the explanation Chippy, sorry.
I have got a slight knock, so maybe the big endsare on their way out...
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
|
|
|
NS Dev
|
| posted on 13/9/09 at 11:26 AM |
|
|
sadly those renault engines were crap when new, let alone when old!!
Is it in a 25? If so, little point in messing with the engine, as something else will break very soon anyway!
I apologise for my bluntness, but with my brother having had one of these grotboxes, I speak from experience!! It did only set him back £50 with 12
months MOT and 5 months tax though.......which must say something
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
|
|
|
MakeEverything
|
| posted on 14/9/09 at 11:34 AM |
|
|
No worries about the bluntness.
Its not in a 25, its in the middy I bought. The renault engine have a reputation for reliability which I think is why it was put in, but I think mine
has done a few miles!!
I'm considering changing it for something a little more common, but we'll see. It needs to be a fairly simple swap, or ill run out of
time.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
|
|
|
Simon
|
| posted on 17/9/09 at 08:03 PM |
|
|
quote:
Originally posted by NS Dev
sadly those renault engines were crap
Some friends bought a R 25 about 9 years ago (with v low mileage) and mistakenly sold two years ago (mistakenly cos they bought another low mileage
car which really is crap.
Their old R 25 now has over 1/4 million miles on orig major mechs
ATB
Simon
|
|
|
