Leaking head gasket

[Linda]

As I understand it, the studs with the ARP moly lube provide a more EVEN torque vs the bolts .
ARP has info on their site.
Linda

[devo]

All I can tell you is that at 60lbs on my iron head, I don't have a drop of oil escaping anywhere on my engine. When an Engineer/Engine builder/parts manufacturer tells me that it should be fine, and then another Infrastructure Engineer backs it up, I listen. Of course, I realize that I do so at my own accountability but so far, so good. Oil leak before, no oil leaks after. I'll let you all know if that changes. Pretty sure it won't though. Me very happy

[Jujuman]

So did not get photos. used a harbor freight digital torque and found all sorts of torque levels on the studs. 40-52lb
checked the clymer manual and took JT recommendations and backed them off, and retorqued to spec page 31
while the valve cover is off, gonna try to polish it a bit.

[devo]

So did not get photos. used a harbor freight digital torque and found all sorts of torque levels on the studs. 40-52lb
checked the clymer manual and took JT recommendations and backed them off, and retorqued to spec page 31
while the valve cover is off, gonna try to polish it a bit.

Did your head gasket stop leaking?

[Jujuman]

i have been on a long line of shifts current day 18/23 i have had 2 days off and each is a 12/14hr shift.
i torqued all down, tried to polish the cover just a tad to see what it would look like.
used cinchagasket and set it all up. i hope on monday i can use the colortune, tweak the mixture and be ready for JT's exhaust.
i will know MONDAY!!

[Jujuman]

well i re torqued the head and i don't think it has worked. it may be because the valve cover breathe tube was not connected. as i also was tweaking the carbs with a colortune.

reconnected and hopefully this coming week i'll have time to tinker. and check if it leaks less

New years resolution:
1: gonna break down the rust bucket
2: break down the motorless one
3: complete the 2L
4: Install JT's sweet exhaust, change the windshield, redo the seats, mount the roll bar, manage the majority of the surface rust spots, and drive it more.
5: to be added...

[Geistfahrar]

Hey, I stumbled onto this thread by accident, & couldn't resist adding my history/experience with the rear-gallery oil leak problem, My leak, however has a "mystery" fix, since it was done by the dealer under warranty. By the end of September, 1969, after taking delivery on 8/10/69, the engine ( U20 ) had oil seepage around the head/block gallery location. Oil was 1-L low @ 1,700 miles, and car was overheating.

The dealer replaced the temp sender & torqued the head, which fixed the overheating problem, but not the oil gallery seepage. The problem persisted, & as I was hip-deep in a design effort ( mating peripherals to IBM 360 mainframes ), I just added oil, until I reached the "event horizon" when the warranty expired. On 4/24/70 I took the car back to the dealer for it's 9,000 mile checkup, & insisted that they fix the problem. After the service, the problem had "magically" disappeared, and the only oil-related part added was a new VC gasket, but no explanation from the dealer. Total charge was $16.56.

When I pulled the engine apart in 1983, after the timing-train catastrophe, I found no mods to the oil gallery hole in the block, but the head was several thousand's out of flat at three corners. Before re-installing the head on the block, I had the machine shop mill the head "dead flat", which I verified on an optically flat granite block ( 8' x 8' x 1' ). Since the re-build, no oil seepage problem. I torqued the head exactly as directed in the service manual ( 18" beam/pointer wrench ) to 65 lb-ft.

Garry S

[JT68]

You are spot on Keith. Its not the studs that will fail- they are quite strong. 80ft-lbs with moly lube is a ton- that is at least 100 lbs dry. That is awfully high. Not a great idea. Factory is 45 for 1.6 and 65 for u20, DRY specs. If you use moly lube (ARP etc) and torque to factory specs you are already torquing 20-25% higher, so 80 with moly-lube is asking for problems.