2H Turbo oil feed - Vacuum pump supply or not?

[GarethsSixty]

Anyone supplying there turbo oil from the vacuum pump supply line? was thinking of getting a double banjo bolt and picking up from there, it appears to come from the camshaft bearing supply, I noticed the 12HT has a fitting a bit above the vacuum pump supply line....was thinking it might save me some mucking around running over to the other side of the engine via the pressure sender, Thoughts?

Gareth

 

[Tapage]

I never did .. but always thought about it .. maybe if you check if that port have full oil pressure and flow .. I don't see any problem with your approach.

 

[fitzmooney]

I did exactly that 3 years ago on my 2H and have had no issues to date.

 

[GarethsSixty]

Thanks guys! much easier to get to, shorter oil line, i think ill do it this way

Gareth

 

[bigbrowndog]

Yes, I ran the oil line from there to my T3 turbo. It was a second hand Safari Turbo Kit and was made to hook up that way by Safari. Had to buy a fitting from Pirtek as that part was missing, Has been no problem all this time, can't remember when fitted for sure think around 2005 or 2006. Cheers

 

[Diesel42]

JUst for info, when your engine rpm increases, your turbo spools requiring more oil as does the vacumm pump from altenator, both now are pulling from the same line competing for oil. Some years back, Crushers posted on a thread discouraging this as he saw premature bearing failures on eihter the turbo or pump when this was done. Our turbo kits come with fittings that allow unrestricted pressure directly from the oil gally on the block. Not saying it won't work but Toyota wouldn't have done it that way.

 

[gerg]

I always T'd off from the oil pressure sender. It just 10" lower down off the block. Use steel braided hose as it's much less chance of rupturing. Hard line would be even better but I always find them frustrating to work with.

 

[bigbrowndog]

Wow, I find this hard to fathom. The 2H has about 25psi at idle, 80psi at 3,000 RPM. Most older 2H=90%+ motors have around 100+PSI as the bore in the pressure relief valve wears unless a longer after market piston is fitted to reduce the pressure. There is plenty of oil there even with a new after market valve. MHO cheers

 

[BEE-JAY42]

Wow, I find this hard to fathom. The 2H has about 25psi at idle, 80psi at 3,000 RPM. Most older 2H=90%+ motors have around 100+PSI as the bore in the pressure relief valve wears unless a longer after market piston is fitted to reduce the pressure. There is plenty of oil there even with a new after market valve. MHO cheers

That's system pressure measured from the gallery, not vacuum pump supply pressure measured after going through a restriction.

 

[watrob]

Hi Bee-jay42, how are things going?

In regards to taking oil from the vacuum pump, I would first pull the pump apart and check the carbon based vanes, these tend to be brittle on older 2H engines after 30 years, if not already broken & chipped and you are now going place more stress on this component. One would assume you are going push oils thru the turbo rather suck hot oil from the turbo into the vacuum pump?

Either way the vacuum pump should be checked?

 

[RufusTheDufus]

In regards to taking oil from the vacuum pump... component. One would assume you are going push oils thru the turbo rather suck hot oil from the turbo into the vacuum pump?

How would the vacuum pump suck hot oil from the turbo?

 

[BEE-JAY42]

Hi Bee-jay42, how are things going?

In regards to taking oil from the vacuum pump, I would first pull the pump apart and check the carbon based vanes, these tend to be brittle on older 2H engines after 30 years, if not already broken & chipped and you are now going place more stress on this component. One would assume you are going push oils thru the turbo rather suck hot oil from the turbo into the vacuum pump?

Either way the vacuum pump should be checked?

I think you have the wrong person?

 

[watrob]

I was saying hello to you Bee-jay42.

Second part of the conversation "In regards" was to Gareth, did not make myself clear enough?

 

[Lasse]

Anyhow, I think you got it wrong Watrob, return oil from turbo has about nada pressure so that would work as any oil feed. Instead of connecting them in series you connect them in tandem/parallel with each there own oil supply hose and return line. Just that on the engine side of the oil hoses they are connected to the same supply/spot.
Got it?

 

[GarethsSixty]

I didnt think it would be an issue as the Turbo will use bugger all oil, it needs bugger all, and the banjo fitting on the turbo has a 1.5mm restrictor....might do a before and after flow test and see how much oil comes out in 30 seconds without turbo, and recheck with turbo....

 

[bigbrowndog]

Must be something wrong with my 2H as it has plenty of oil going to the vacuum pump and not sure why anyone would take oil from the vacuum pump return line. When this hose fails you will see what I am saying LOL.

 

[RufusTheDufus]

...not sure why anyone would take oil from the vacuum pump return line.

I don't think that's what Gareth had proposed though somehow that's what this thread has morphed into. To do so might be the stupidest turbo install idea/suggestion ever.

 

[GarethsSixty]

yeah, I definatley wont be using the vac pump return as a turbo supply LOL
just a double banjo on the block to run two oil lines, One to Vac pump and One to Turbo SIMPLES

 

[AussieHJCruza]

Denco diesel take their oil for the turbo from a fitting at the oil pressure sender.

 

[Aravind Dileepan]

Anyone know where to get replacement oil return lines and banjo fittings? I'm in the States.