babaz7

seems like im having all kinds of problems with my new build.

its a 2.1L build and now im having an oil leak between the head and the block coming from where the cam angle sensor housing is located.

the headgasket is a brand new cosworth gasket. head studs are arp torqued to 80 pounds.

what could be the reason for the oil leak between head and block?

can you install the head gasket incorrect, upside down etc? or thats not a possiblity?

RightSaid fred

What's the bore size of the engine?
What's the bore size of the gasket?


Have you tried re torquing the head?

How much boost?

babaz7

engine bore size is 86.5mm
head gasket is 87mm

i will re torque the headstuds today

im just running 18 psi at the moment, my 3 port failed on me so waiting for a new one, right now just wastegate pressure

mines5

Don't wana sound harsh but I think your engine builder / mechanic is a novice.

Check your inbox.

meckert

iTrader: (11)

Looks like your light about 20ft lbms--straight from the ARP instructions.

Automotive Racing Products
Tel: (805) 339-2200 1863 Eastman Avenue Fax: (805) 650-0742
Ventura, Ca 93003 www.arp-bolts.com
INSTALLATION METHOD FOR CUSTOM AGE 625 HEAD STUD KITS
Part Number: 207-4302
Application: Mitsubis
hi 2.0L (4G63) Turbo 4-cyl
1.
Always verify the part number for your application wi
th the part number on the side of box and the part
number on the instruction sheet. This will help ensu
re you have the correct installation procedure for
your specific application before installing any components.
2.
Clean and inspect all hardware prior to installation. Look
for obvious defects or shipping damages, plus proper fit,
length and dimension.
3.
To ensure proper thread engagement and accurate torque
readings, clean ALL threads in the block. Chase if
necessary with ARP Thread Chaser, part number 912-0004 (M11 X 1.25)
.
4.
If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD
SEALER.
5.
Screw studs into the
block “HAND TIGHT ONLY”.
NOTE: LOCTITE MAY BE USED IF A PERMANENT MOUNTING OF THE STUDS IS PREFERRED. THE
FASTENERS, HOWEVER, MUST BE TORQUED PRIOR TO THE LOCTITE SETTING UP.
6.
Install the cylinder head(s) and check for binding or misalignment.
7.
Lubricate the stud threads, nuts and washers with
ARP ULTRA-TORQUE FASTEN
ER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto
the studs and tighten them hand tight.
ARP recommends using the
ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that
is provided with each kit as opposed to
motor oil. This is due to higher friction on the studs
as well as inconsistencies in the clamping force of
the fasteners when motor oil or other low quality lubricants are used.
PRELOAD (TORQUE) RECOMMENDATIONS
8
.
Following the manufacturers recommended torque sequence tighten the nuts
in three equal steps to
100
ft lbs with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.

mines5

Is there any instruction..how many times can these be re torqued?

meckert

iTrader: (11)

These are no stretch studs so as many as it takes.

LetsGetThisDone

iTrader: (1)

You would need to check the stud for stretch.

mines5

That's what i was thinking

meckert

iTrader: (11)

I would think a quick call to arp would answer this question--
Since there is no stretch limit measurement mentioned in the instructions, and way too may folks resell these after they're installed ....I find it hard to believe they are torque to yield. He didn't even hit the max torque for the application yet as well at 80lbs,
Hell, maybe I'm wrong.

mines5

You might be right but i have seen ARPs stretch. So if people are applying more torque they would still not stretch ?

meckert

iTrader: (11)

Since there is a question, ask the manufacturer--that was my first recommendation.
How do you stretch something when you haven't reached the recommended torque spec yet?
If you have seen stretched ARP's-- the OP could benefit from the stretch you experienced and the torque applied.

talonkev

iTrader: (5)

Which ARP head studs do you have? The instructions posted above are for ARP 625+ studs. I believe 80 ft-lbs is ARP's recommended torque spec for the "standard" APR head studs.

tauro91

when did you notice it started leaking? was the block and cylinder decked and resurfaced properly for an even seal? the torque/stretch is a good point but why only focus on that why is it only leaking from that particular side, bad gasket? alot of factors