new lifters but still ticks

[240slidekat]

so which holes is it in this picture? is the red ones? whats the green ones for?

[240slidekat]

anything?

[Bluefire]

Red... you most likely have an oil clog somewhere. A lot of times when your scraping the factory headgasket off, stuff will get stuck in the water and oil passages.

[240slidekat]

so which one is the oil passages for the lifters?

[Darius]

Not sure. Blow air in each port in the head deck and see if air comes out in the lifter supply "tube".

[mott6904]

If you have the cams out already pull the lifters and spark plugs. then have a buddy crank the car over see if you have oil squirting where it needs to.

[nemesis-dk]

Sorry to bring a OLD thread to life again ..... But im ready to NUKE my RB

long story short: Have an all in pro spec R32 R25 drift-car and have now picked my engine apart 4 times now ,given it ARP bolts new-used head that been by the machine shop to be recon´d
Changed oilpump
alot of headgaskets

BUT

I have a lifter (oil) problem i cant seem to find !
The engine runs spot on !!..... until i rev it to 7000ish and here starts the ticking from the lifters and i have 80 psi oilpressure here fully warmed up ............. I dont get it !

Is there somewhere in the head i can meassure the oilpressure in the oil gallery ?

Bonus info
The ticking is on both sides
If i disregard the ticking and keep on "trucking" it just spreads to almost all of them.
then i stop the engine and scream at it go home and return the next day to start it up and the ticking stops !
I have an oil-cooler with fan on it
im running Sunoco 10-60 racing oil

I need to find the origin of my problem or i will go MAD
You can see my car here : http://bilgalleri.dk/gal_visbil.aspx?ID=205765

[Darius]

At 7000 rpm, are you sure it is the lifters and not knock? What do you have for an EMS since you've raised the redline?

[nemesis-dk]

Megasquirt and yes im sure ! and no its not my 12 injectors eigther

[Darius]

What is your rev limiter set at? Are you running the stock valve train (i.e. valve springs)?

[nemesis-dk]

Late last year i smashed a lifter and the valve under at a competition where i could hear a lifter was dead and ignored it to complete the comp. the top of the valve stem had taken a lot of beating so i replaced lifter, valve, spring. retainer and lock and reassembled the engine just to find this problem.
There is now a different head on it from a running engine and it still has the same problem so im ruling lifters out .
rev limit 7500 oem springs

bottom bored 2 years ago and acl bearings and wossner pistons

Running 1 bar boost

[nemesis-dk]

Ok guys i took my Sherlock Holmes hat on today (again)
I took my old head and went through its oil channels and im maybe 1 step closer to solve this mystery ...

The lifters get oilfeed from 2 channels that runs through/past 4 of the head bolts....then i remembered .... had absolutly no problems before i shifted to ARP studs.

Im well aware that thousands of ARP bolts/studs find the way to our engines with no issues at all but it is possible that ive got a set that are a fraction thiker than normal so they will act as restrictors.



So when i can free some time from the costumers old US-cars i will try to replace 4 of the studs with oem bolts and see if that does the trick.

[Darius]

It will be tough to tell, but some people run restrictors in the oil feeds or block them with a plug completely. I have one plugged and one restricted with an N1 pump and ARP head studs and don't think it has ever ticked at high rpm. It tends to break up but I think that is due to timing or coil signal noise. That is still TBD.

[nemesis-dk]

Got around to pulling the four headbolts arp studs are 11mm std bolts are 10mm and the channel is 11,5mm so there has only been 0,25mm around the arp stud to feed oil to the lifters ..... in my book not much... i have hammered the engine and slaugthered a set of tires ,,,, you know what ..... no ticking at all ! So much work and money for gaskets wasted because of stud opgrade ........