Gallery Gasket Time?

nis350 · 11-21-2021, 01:28 PM

I recalled looking to buy an 350z long ago and never heard about the gallery gasket issues. I think the same V6 is also used in other models like the g35, g37, Maxima and Altma etc.... Any idea about the percentage of failure rate?

Quote:

Originally Posted by Rojoryu

The same style gasket was used on the 350z, and on the 370z up until the 2012 model when they upgraded to a better gasket material/hardware. Even still, plenty of 350z's are still on the road with stock gaskets. Just luck of the draw I guess. I have read others having low pressure codes and the dash light, but apparently at that point it may be too late and the engine could be damaged. For me, I had no symptoms. From reading on these forums I figured it would be a good measure to add a pressure gauge since this will be primarily a track car.

Rojoryu · 11-21-2021, 02:49 PM

We’ll there we have the culprit…

Rusty · 11-21-2021, 05:08 PM

Quote:

Originally Posted by Rojoryu

We’ll there we have the culprit…

The screw that is shown in the red circle. The edge of that screw and the other screws that hold everything down. You will want to take a center punch to that edge and put a dimple on that edge and into the metal. If you want to feel really safe. Put another punch mark 180 degrees from it. This will keep the screws from backing out and loosening.

Rojoryu · 11-22-2021, 05:40 AM

Quote:

Originally Posted by Rusty

The screw that is shown in the red circle. The edge of that screw and the other screws that hold everything down. You will want to take a center punch to that edge and put a dimple on that edge and into the metal. If you want to feel really safe. Put another punch mark 180 degrees from it. This will keep the screws from backing out and loosening.

Thanks for the suggestion, Rusty. I planned to used some blue loctite and torque down to 11ish lbs, I assume that's not an issue? Does the dimple work by deforming the head of the screw just enough to lock it in place?

I don't want to be that new guy who over posts but I plan to throw some pictures up today to confirm my chain is aligned with the markings correctly before I pull it off. I have been hand turning this thing forever and havent gotten close yet. I'm tempted to mark things where they are now and just remove it.

Rusty · 11-22-2021, 01:16 PM

Quote:

Originally Posted by Rojoryu

Thanks for the suggestion, Rusty. I planned to used some blue loctite and torque down to 11ish lbs, I assume that's not an issue? Does the dimple work by deforming the head of the screw just enough to lock it in place?

I don't want to be that new guy who over posts but I plan to throw some pictures up today to confirm my chain is aligned with the markings correctly before I pull it off. I have been hand turning this thing forever and havent gotten close yet. I'm tempted to mark things where they are now and just remove it.

The dimple displaces metal to lock it. It's standard practice on some equipment.

Take pictures. They will help you. I take pictures all the time when working on something.

Rojoryu · 11-22-2021, 01:59 PM

Quote:

Originally Posted by Rusty

The dimple displaces metal to lock it. It's standard practice on some equipment.

Take pictures. They will help you. I take pictures all the time when working on something.

I took pics of EVERYTHING. After pulling the primary chain off everything moved around a little but I haven't touched the secondaries so I'm not too concerned. I honestly don't feel too confident changing the secondaries out. I should have the boundary gears, new chain, water pump, thermostat, etc tomorrow or Wednesday so I will be able to button it up soon. Here are the pics I took before removing it.

Rojoryu · 11-23-2021, 04:16 PM

Well, I think I made a pretty stupid mistake. When I was turning the motor over by hand to time it, I didnt use the pulley or a spacer, I just put the bolt directly into the crankshaft. When I went to pull the bolt out after timing it I noticed it was a little tough coming out. And now it wants to bind up going back it after a few turns. I ordered a new bolt, but my fear is that I damaged the threads in the crankshaft. I assume I can chase the threads if that's the case but it's not something I have any experience with. Any suggestions?

Tractionless · 11-25-2021, 07:49 AM

Quote:

Originally Posted by Rusty

The dimple displaces metal to lock it. It's standard practice on some equipment.

Applying the dimple won't screw up the threads in the hole or be the cause of cross threading etc? Curious as to why not high temp. thread locker.

Dreadnaught · 11-25-2021, 07:31 PM

Using just a c*nt hairs worth of blue loctite will work just fine.

Rusty · 11-25-2021, 08:20 PM

Quote:

Originally Posted by Tractionless

Applying the dimple won't screw up the threads in the hole or be the cause of cross threading etc? Curious as to why not high temp. thread locker.

Dimpling the edge of the screw won't damage the threads. Too far away. You don't touch the threads.

11-25-2021, 07:31 PM	#9 (permalink)
Dreadnaught Track Member Join Date: Dec 2009 Location: Farmington, Utah Posts: 582 Drives: 14 SR 370z 6MT Rep Power: 10140	Using just a cnt hairs worth of blue loctite will work just fine. Optimiser likes this. __________________ Ford Diesel and Heavy Line Technician at your service. Last edited by Dreadnaught; 11-25-2021 at 09:44 PM.*

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11-23-2021, 04:16 PM	#7 (permalink)
Rojoryu Base Member Join Date: Sep 2021 Location: Charlotte Posts: 48 Drives: 2011 370z Base/Sport Rep Power: 16	Well, I think I made a pretty stupid mistake. When I was turning the motor over by hand to time it, I didnt use the pulley or a spacer, I just put the bolt directly into the crankshaft. When I went to pull the bolt out after timing it I noticed it was a little tough coming out. And now it wants to bind up going back it after a few turns. I ordered a new bolt, but my fear is that I damaged the threads in the crankshaft. I assume I can chase the threads if that's the case but it's not something I have any experience with. Any suggestions?