Discussion
In the workshop manual description (V8 engine oil-change procedure), they mention installing the new filter (partially filled with fresh oil) quickly, so as not to allow the pump to drain.
This always confuses me, surely, we want all the old oil (including that in the pump) to drain out, before refilling with fresh oil?
What am I missing here?
Any help would be greatly appreciated.
Thanks In advance.
This always confuses me, surely, we want all the old oil (including that in the pump) to drain out, before refilling with fresh oil?
What am I missing here?
Any help would be greatly appreciated.
Thanks In advance.
A full fill after stripping the engine is almost 10L, the most I've ever used in an oil change is about 7.5L
That's one reason why the arguments against using a vacuum pump to extract the oil via the dipstick tube are so laughable
No least because when you remove the sump plug after using the pump, in order to check the magnet, you can catch any last drips with a kitchen towel
That's one reason why the arguments against using a vacuum pump to extract the oil via the dipstick tube are so laughable
No least because when you remove the sump plug after using the pump, in order to check the magnet, you can catch any last drips with a kitchen towel
The pump is higher than the sump, as with previous comments I believe it's not self priming.
After my rebuild, all the pipes from the filter back and through the cooler and down were dry. The manual states packing the pump with Vaseline as a way of aiding priming, my way (because I had lots of time) was to back flush. Not a quick method, it took all night for the level to drop but it was my way of doing it.
After my rebuild, all the pipes from the filter back and through the cooler and down were dry. The manual states packing the pump with Vaseline as a way of aiding priming, my way (because I had lots of time) was to back flush. Not a quick method, it took all night for the level to drop but it was my way of doing it.
I rebuilt my engine, filled it with oil, turned it on the starter for 30 secs and it self primed, the oil pump was empty prior to this..
I remembered the capacity slightly wrong, and put 7L in with overfilled it.
I think it is 6.5L in normal fills.
All I did do was fill the oil filter with oil first.
I remembered the capacity slightly wrong, and put 7L in with overfilled it.
I think it is 6.5L in normal fills.
All I did do was fill the oil filter with oil first.
The manual refers mostly to the early twin sump plug engines which were a pain in the whatnots if you left the engine empty for any length of time (eg drain oil one day, leave overnight, refill the next) .. they would sometimes not self prime. You had to back-fill as the previous poster has commented.
The later single sump plug engines appear to be vastly superior, to the point that I have never had any priming issues on those engines at all.
The later single sump plug engines appear to be vastly superior, to the point that I have never had any priming issues on those engines at all.
Went ok.
Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Edited by Imran999 on Saturday 15th May 08:15
Imran999 said:
Went ok.
Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Yeah the dipstick is interesting.Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Edited by Imran999 on Saturday 15th May 08:15
Best way is to leave the dipstick out over night and then dip the level in the morning.
You only get one go at it as the act of pulling the dipstick out drags oil up the tube and that gives you the odd readings.
gruffalo said:
Imran999 said:
Went ok.
Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Yeah the dipstick is interesting.Initially, I cranked it over with the fuel pump fuse pulled out. Got no oil pressure and panicked.
Then eventually, I found Tanguero’s post (from like 10 years ago), where he suggested just firing it up.
Did this, and sure enough, within a few seconds got full pressure (phew!).
Reading that dipstick is another story altogether - what fun that was. The back of the gauge reads one level and the front reads another. Replace and repeat and both readings are different to the first time. Keep repeating, and get almost as many variations.
I’ll read it again in the morning, and will likely have to drain a little bit off.
Never a dull moment with these cars, working or not.
Edited by Imran999 on Saturday 15th May 08:15
Best way is to leave the dipstick out over night and then dip the level in the morning.
You only get one go at it as the act of pulling the dipstick out drags oil up the tube and that gives you the odd readings.
Seems like a small foam collar on the dipstick, close to the metal tab, would work wonders for improving readings.
Edited by Imran999 on Saturday 15th May 16:13
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