| Page: |
| Home > Help Needed / General Tech Chat > No or very little oil pressure | |||||||
 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
9th Jul, 2015 at 07:28:35am
The point I was trying to make last night is clear here
Schrödinger's cat - so which one am I ??? |
||||||
 6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 09:12:54am
I hadn't picked up on that Rod and its a very valid point |
||||||
 696 Posts Member #: 10034 Post Whore Birmingham |
9th Jul, 2015 at 09:25:27am
Do you need the drain? Most of the pictures so far show the drain (just about) blocked, so If I make a steel gasket support, should I just block it off?
|
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 09:44:24am
I think we should see how Graham's works out with the new pump; Hopefully that confirms our thoughts and we can work on the solution as a retro fit. I would have thought the drain is there for a reason otherwise the oil expelled from the cam bearing will have no where to go
|
||||||
|
5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
9th Jul, 2015 at 09:51:07am
On 9th Jul, 2015 PhilR said:
Rod, what due think is the chance that this pump will ever prime? I've had to prime mine manually the oldskool way twice, once when I first built it and once when I hadn't run it for a year (lost interest in the project syndrome). Other than that I just get a very slow build-up of pressure and overall lower pressure than you would expect from a high capacity pump. So I'm 99% certain I have a badly designed/machined pump too. Won't know for certain until I pull it out to look but all the indications are that it is the same. If you assume that unwanted gap is smallest at the "T" area (and the lack of gasket looks longer around the ports in your case too) then the size of the hole is the width of that "T" bit times the thickness of the gasket. So it depends on how fast air can flow in through that gap (lack of prime) or oil can flow out (loss of working pressure) compared to the capacity of the pump. One thing Graham did tell me a while ago (by email, not on the forum) is that when he had refitted his pump for I think the second time and temporarily installed a clear plastic tube from the block to the filter to watch how fast the oil was draining back, whenever he was cranking the engine there was a steady stream of air bubbles flowing with the oil. Neither of us could understand why at the time as he'd been through all the usual stuff, gearbox gasket, O ring, suction pipe gasket etc. I think it's fairly obvious why now... EDIT missing bit added. Edited by Rod S on 9th Jul, 2015. Schrödinger's cat - so which one am I ??? |
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 10:25:15am
this is all good stuff guys and clearly shows the knowledge and info available on this forum.
|
||||||
|
696 Posts Member #: 10034 Post Whore Birmingham |
9th Jul, 2015 at 11:11:55am
On 8th Jul, 2015 Rod S said:
Phil, In those measurements did you include the bolt head thicknesses ? There's a mistake in my calcs that I've now gone back and edited. I thought you meant the bolts that hold the steel back on the pump, but totally forgot about the 1/4" bolts that hold the pump to the block. Taking these into account closes the gap down to 1.6mm for me. I'll reiterate that you should measure it for yourselves if you choose a steel 'patch' plate as a fix! |
||||||
 608 Posts Member #: 1106 Post Whore Hungerford, Berks |
9th Jul, 2015 at 11:21:54am
On 9th Jul, 2015 Rod S said:
One thing Graham did tell me a while ago (by email, not on the forum) is that when he had refitted his pump for I think the second time and temporarily installed a clear plastic tube from the block to the filter to watch how fast the oil was draining back, whenever he was cranking the engine there was a steady stream of air bubbles flowing with the oil. Neither of us could understand why at the time as he'd been through all the usual stuff, gearbox gasket, O ring, suction pipe gasket etc. I think it's fairly obvious why now... EDIT missing bit added. There will be NO bubbles in 5 ½ hours time… ’77 Clubman build thread
|
||||||
|
696 Posts Member #: 10034 Post Whore Birmingham |
9th Jul, 2015 at 11:32:39am
Thanks, that's a good idea with the clear pipe - will have to remember that one for the future. Edited by PhilR on 9th Jul, 2015. |
||||||
|
608 Posts Member #: 1106 Post Whore Hungerford, Berks |
9th Jul, 2015 at 11:39:35am
To start with I was not so sure it was a good idea:
’77 Clubman build thread
|
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 11:49:32am
here is hoping!
On 9th Jul, 2015 Graham T said:
On 9th Jul, 2015 Rod S said:
One thing Graham did tell me a while ago (by email, not on the forum) is that when he had refitted his pump for I think the second time and temporarily installed a clear plastic tube from the block to the filter to watch how fast the oil was draining back, whenever he was cranking the engine there was a steady stream of air bubbles flowing with the oil. Neither of us could understand why at the time as he'd been through all the usual stuff, gearbox gasket, O ring, suction pipe gasket etc. I think it's fairly obvious why now... EDIT missing bit added. There will be NO bubbles in 5 ½ hours time… |
||||||
|
940 Posts Member #: 1424 Post Whore Carnforth, Lancs |
9th Jul, 2015 at 12:14:21pm
This is definitely a good active thread and there's been some great engine forensics carried out by you guys.
|
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 08:19:01pm
Well i spoke with graham about an hour ago. He's now doing an good impression of a dog with 2 tails!
|
||||||
|
608 Posts Member #: 1106 Post Whore Hungerford, Berks |
9th Jul, 2015 at 11:09:28pm
On 9th Jul, 2015 PhilR said:
Thanks, that's a good idea with the clear pipe - will have to remember that one for the future. It’s not that good an idea, especially if you get distracted on the phone and forget you have a piece of shit plastic pipe as you main transfer pipe… 
Dad saw it ballooning, he said about 4” around, It burst seconds before he got to the ignition key. Now it all has to come apart again to clean the oil off the block and out of the radiator. However, before the mass evacuation of oil 
Not a bubble… Primed once, spun over on the starter and within 10 seconds all air was gone and pressure at 60PSI. Left it for 15 minutes and spun over again on starter 6 seconds to get pressure up. Looking good… Plugged in ECU, started up and 4 or 5 seconds to 60PSI on fast ticker over – 1200RPM. Let it get warm and increased revs to 2900 – 75PSI Ran it up until the fan cut in, still holding 75PSI. Stopped the engine, chatted with Rob a bit more and restarted after about 5mins. Instant pressure, holding 70PSI at 1800RPM Dropped down to idle after another few minutes and Pressure was at 40PSI, which it held nicely. Transfer pipe will be replaced on Saturday, then I can run it up again and check the leak down over the next few days. So not 100% confirmed as cured until I know I’m not going to have to constantly keep priming it, but with the turbo pump installed it never got pressure up that quickly and has needed to be re-primed after 5mins of inactivity. Now if I had some brakes I could do the real test. ’77 Clubman build thread
|
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
9th Jul, 2015 at 11:17:30pm
Good news then Graham. |
||||||
|
166 Posts Member #: 8952 Advanced Member Athens Greece |
10th Jul, 2015 at 09:50:55am
Thanks for an amazing thread,
|
||||||
 67 Posts Member #: 8956 Advanced Member Algarve/Portugal |
11th Jul, 2015 at 11:13:47am
Same here, GLP110MS bought from minispares in March 2015, still package in the box.
|
||||||
|
5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
11th Jul, 2015 at 11:55:56am
Get yourself some engineering blue, put a small film on the block face, insert the pump and wiggle it a bit then photo the back of the pump.
Schrödinger's cat - so which one am I ??? |
||||||
 2094 Posts Member #: 9894 Post Whore Dorking |
12th Jul, 2015 at 11:24:56am
Bugger. Got one of these in my fresh build. Yet to turn it over. |
||||||
 1733 Posts Member #: 1910 Post Whore Wilts |
12th Jul, 2015 at 10:28:21pm
Ive also got one in my engine yet to turn it over, I think I'll pull it apart :( On 15th Jul, 2009 fastcarl said:
the pissed up clown stood back up, did a twirl and left bollock naked, |
||||||
|
608 Posts Member #: 1106 Post Whore Hungerford, Berks |
13th Jul, 2015 at 07:21:52am
One thing of note:
’77 Clubman build thread
|
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
13th Jul, 2015 at 07:53:27am
good stuff Graham. Glad to hear its still looking positive.
|
||||||
|
5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
16th Jul, 2015 at 07:33:55pm
Just dragging this one up again...
Schrödinger's cat - so which one am I ??? |
||||||
|
6729 Posts Member #: 618 Post Whore Glasgow |
16th Jul, 2015 at 07:39:54pm
I know a few people have looked at pumps and may have similar concerns but nothing has been blued to confirm as yet |
||||||
 1767 Posts Member #: 9165 Previously josh4444 Australia, brisbane |
17th Jul, 2015 at 08:26:54am
Sunday is the day for me to pull my new engine out for a few other reasons not related to this pump deal but i sure will be checking it while its out
|
||||||
| Home > Help Needed / General Tech Chat > No or very little oil pressure | |||||||
|
|||||||
| Page: |