Stroker oil pump failure

[Error404]

I have heard an opinion that oilpump dies very quickly without that black antifriction coating on the backplate. Not personal experience. It was just about audi 5-pot motors.

...if I ever have to chose a better oilpump out of several ones withoout measuring tools, I look at the condition of this black coating at first.

Interesting. I was curious as to what that coating was for. I thought it was just black oxide at first, but why bother? Anti-friction coating makes sense.

[newsh]

There's a pressure relief valve under one of the head bolts which can be damaged if the bolt is too long. Problems usually occur only with head studs though. The stud in that position has to be shortened.

[curamrdan]

There's a pressure relief valve under one of the head bolts which can be damaged if the bolt is too long. Problems usually occur only with head studs though. The stud in that position has to be shortened.

Im sure there is not oil valve under headbolt thread in block. There is some check valve under gauge pressure sensor or pressure switch.
Can you be even more specific, maybe some picture will be the best description.
Engine is assebled ready to pickup, so i need your info soon as possible. Thanks.


EDIT2: removed prevousion, you think this right?

http://forums.quattroworld.com/s4s6/msgs/247549.phtml

So its not head but main bearing stud problem. Im using also non factory bolts here, generic M10 12.9 inbus bolts. Unsure lenght, i think maximum in few mm difference. Who know how much is there space from OEM to contact with valve...
Damn, oilpan is back&sealed on engine...

[newsh]

Stroker oil pump failure

Sorry bud, dodgy memory these days, yes it's the main bearing stud.
I don't know if this could cause your problem, I've just read about it on here in the past.

[andy10v]

No. 3 main cap stud that can crush the oil check valve if it is too long

Info from Dave towards the bottom of the page

http://forums.quattroworld.com/s4s6/msgs/96161.phtml

[bivw]

Im building a AEL stroker engine
It has no oil check valve
On 3 main cap stud [emoji848]

[AndyP]

Im building a AEL stroker engine
It has no oil check valve
On 3 main cap stud [emoji848]

It should have, all the AEL's I've stripped have had one. There are two different types, there's some pictures here:-

http://www.s2forum.com/forum/showthread.php?t=44641&highlight=check+valve

[bivw]

Aaaaah yes that one whit a seal came out ...
Could it be convert to a 12tooth one ?

[hammer]

Tdi oilpump is the same, i also use it without any problems!
Only issue is quality of the new pumps😒. A friend also had a problem with it....

Gesendet von meinem PLK-L01 mit Tapatalk

[bivw]

Stroker oil pump failure

I have let my oilpump gears and backplate of the pump camshafts,crank,mainbearings
Coated whit a DFL1 coat

After reading a lot about it i decide to give it a try
Don't now yet iff it works but got a good feeling about it
Got a new (old style oem oilpump whit black back plate)