Who's the guy that sells the rebuild vanos?

[jet_dogg]

What are other places doing (or not doing) that's causing the pressure loss?

I'm simply trying to understand what the actual process is and services rendered that you are paying for.

[eacmen]

What are other places doing (or not doing) that's causing the pressure loss?

I'm simply trying to understand what the actual process is and services rendered that you are paying for.

Its not poor workmanship on the rebuild or the parts used but wear and tear on the unit that wouldnt be evident unless you’re a machinist.

[maupineda]

Its not poor workmanship on the rebuild or the parts used but wear and tear on the unit that wouldnt be evident unless you’re a machinist.

Agree… I tested a unit from a low miler (according to the seller) and it could only do 85bar at hot. So it is not only bench testing the seals, but at temperature. Unfortunately, unless you are BMW, i don’t see how anyone could test these units properly. Best course of action is test your car (DIS ISTA and pressure) and if all ok, redrill your disc and keep your own unit, otherwise it is a gamble… ask me how I know.

heck, lesson learned here is do not mess with it unless you must, if all tests are ok and your only concern is disc hole size for the hub, just do that.

and by test I meant putting it on my car and test with ISTA and Pressure

[eacmen]

Agree… I tested a unit from a low miler (according to the seller) and it could only do 85bar at hot. So it is not only bench testing the seals, but at temperature. Unfortunately, unless you are BMW, i don’t see how anyone could test these units properly. Best course of action is test your car (DIS ISTA and pressure) and if all ok, redrill your disc and keep your own unit, otherwise it is a gamble… ask me how I know.

heck, lesson learned here is do not mess with it unless you must, if all tests are ok and your only concern is disc hole size for the hub, just do that.

and by test I meant putting it on my car and test with ISTA and Pressure

Never saw his test rig first hand but Mike was able to bench test these units to working pressure.

My naive view is he was able to plumb the oil inlet and outlet and drove the pump disc with an electrical motor.

How he did it doesnt really concern me as much as having confidence in the unit you’re putting in.

[maupineda]

Never saw his test rig first hand but Mike was able to bench test these units to working pressure.

My naive view is he was able to plumb the oil inlet and outlet and drove the pump disc with an electrical motor.

How he did it doesnt really concern me as much as having confidence in the unit you’re putting in.

I think you are being naive, how will he test the unit can build 115 bar of pressure and oil +70C? Yeah, i bet if someone has that capability they would be screaming and raving about it.

Function testing could be done with the bmw tool that fcp and ecs sell and a 20lb air supply, but that is not representative of a 115 bar and +70C temp oil.

[02_lsb]

It looked him up. I don’t see any type of test bed description. Please share details.

[BlAikenstein]

I rebuilt a few vanos units and drilled some disks for mike while he he was out of commission from shoulder surgery. the test procedure was spinning the pump disk by hand, if it built pressure it’ll click and if not it’s toast. We’d check the intake/exhaust bores for scoring and slide them in/out to check if they were sticking. Idk what other companies are doing but mikes method seemed to work.

[Cubieman]

I had a conversation over IG with Mike at Naturally Agitated and he said his testing process was bolting the vanos to his "shop engine", I figured S54 on an engine stand when he said that.


Edit:

I rebuilt a few vanos units and drilled some disks for mike while he he was out of commission from shoulder surgery. the test procedure was spinning the pump disk by hand, if it built pressure it’ll click and if not it’s toast. We’d check the intake/exhaust bores for scoring and slide them in/out to check if they were sticking. Idk what other companies are doing but mikes method seemed to work.

I must not be remembering correctly in this case..

[maupineda]

I rebuilt a few vanos units and drilled some disks for mike while he he was out of commission from shoulder surgery. the test procedure was spinning the pump disk by hand, if it built pressure it’ll click and if not it’s toast. We’d check the intake/exhaust bores for scoring and slide them in/out to check if they were sticking. Idk what other companies are doing but mikes method seemed to work.

Really, spin by hand? That ain’t a test…