Loctite 518 and oil pump, ...did I screw up bad? Options

[yeahmag]

I'm running the CB performance dry sump pump and am attempting to get a bit more pressure at hot idle. I'm considering addressing two potential issues:

Primary Concern: I used Loctite 518 AND the gasket between the cover and the pressure side of the pump. 518 is a gasket replacement and NOT a gasket enhancer. Anybody care to guess if I managed to increase the cover to gear clearance a bit by using 518 and the gasket on the front cover?

Secondary Concern: The last 3 feet of my supply line necks down from -12AN to a T and then -10AN. Not likely in my mind to cause a hot idle issue (cold idle is 40PSI), but thought I'd mention it.

Idle pressure is almost exactly 10PSI at 185F and 1000RPM. I'm using Brad Penn 20w-50. BTW - both motors appear to have water vapor coming out of the breathers with Brad Penn. I've heard others having this "issue" too. Is it an issue? I'm considering trying Jake's "Snake Oil"...

[r_towle]

Try joe Gibbs racing oil.

[yeahmag]

Opinions on DT50 vs. Snake Oil (Raby's Brand)?

[Jake Raby]

My "Snake Oil" became DT50 last year.

As for the 518, it shouldn't be used with a gasket, often if it is it will compromise the gasket due to its density.

[yeahmag]

Yeah... I'm half tempted to pull the fan shroud and replace the gasket/518 combo with just a gasket. Then again I have a set of Finch heads from Len waiting to go on (to replace my 2L heads) that is awfully tempting!

[mrbubblehead]

i dont think i used a gasket at all. just the 518. i did open the passages of the pump and radiused all of the 90 degree turns. is your oil light flickering at idle?

[yeahmag]

If I drop it much below 1000RPM with the dual pole VDO (which is set higher than stock) it will flicker or come on.

I radiused all the turns and paid special attention to the outlets as they seemed especially small. I spent some time porting and measuring this pump. A good bit more than a "cleanup" though...

What are your pressures at idle?

[mrbubblehead]

at 800 rpm on the blistering hot days, 230 degree oil temps im at 6 to 8 psi, running 5-30wt amzoil. no flicker with the stock sending unit. but i dont even sweat it. no load at idle.

[r_towle]

Seems to me that a ported blueprinted oil pump would flow more, but may end up doing it at a lower oil pressure.

Have you looked at the relief valve and blueprinted that?
There was a good thread here about getting the seat smoother and making that valve do its job better...

Rich

[yeahmag]

I installed one of the Headflow Masters oil control valves out of curiosity and it made little difference at idle. I have a Weltmeister high pressure setup on the secondary relief still.

[r_towle]

have you looked at the thread about the seating area of those valves?
Its rough and when honed and trued up, can and does increase oil pressure.

Something to look at if and when you remove the engine for heads and other work.

Rich

[yeahmag]

Are you talking the secondary relief valve? The one in the side of the case?

[r_towle]

http://www.914world.com/bbs2/index.php?sho...++valve++honing

[yeahmag]

Yeah... That's the one that got entirely replaced by Adrian's widget:

http://www.headflowmasters.com/vw-oil-pres...ml#.UlxkHGRgZRc

[r_towle]

that might be cool, but if the seat sucks, then a new piston will still let pressure move past.
The seat is in the case.

Rich

[yeahmag]

It's not a new piston. It's an insert that replaces the piston and seat (press fit) and then uses a ball to act as the piston. Take a look a that link I sent in the previous post. It should by pass the "bad seat" problem entirely.

[r_towle]

cool, but you still have an issue IMHO of low oil pressure.

Is there anyway for you to increase the oil pressure with a different pump?

Did your oil pressure get worse over time, or has this been since day one of the rebuild?

What is the capacity of your system?
If its small enough, go buy the other types of oil suggested, see if that helps.


rich

[yeahmag]

Day 1. But I've never run an oil pressure gauge before this build. All the normal things were done to this case to help guarantee good pressure.

The only thing I can really do pump wise is to address the issues at the top of the thread. The is the CB Dry Sump setup, so going back to a wet sump isn't really palatable. Above idle is all good so far. Technically even idle is passable, I'd just like to see more pressure there. Again, pressure is off the chart when "cold".

[yeahmag]

Forgot to say capacity is about 11 qts.

[r_towle]

Accusump might help, depending upon how you configure it.
It may be worthwhile to try out Jakes oil...
He made mention of this in another low oil pressure thread...changing from BP to Gibbs...

Not sure, maybe the heated oils have different viscosities...which kinda sucks considering the ratings are there for a reason...

He has done some research on the oils...its what...50 bucks...
Worth a try I guess.

rich