California 1978 Datsun 280z Restomod

[jonbill]

It shouldn't be silicone, the vent baffle originally has some hard light coloured material holding it, but it quite often breaks off so people might be tempted to replace it with silicone.

[grannyknot]

You can chip it out but if you are going to sand blast it you need to remove the oil  baffle entirely, lots of sand can hide in there and destroy the engine later.  I used 3Bond 1184 to seal the oil baffle and securing screws, it has held up well over the years.  Best to wait until the powder coating is done before reinstalling the baffle.

 

[Kevin McSweeney]

On 6/1/2019 at 2:49 AM, grannyknot said:

You can chip it out but if you are going to sand blast it you need to remove the oil  baffle entirely, lots of sand can hide in there and destroy the engine later.  I used 3Bond 1184 to seal the oil baffle and securing screws, it has held up well over the years.  Best to wait until the powder coating is done before reinstalling the baffle.

 

Ok, I spent some more time on this valve cover today. Removed as much of the silicone as I could and took out the baffle and power washed the whole thing. Looks ready to sand blast and powder coat.

Edited June 27, 2019 by Kevin McSweeney

[Kevin McSweeney]

In other news.... 

 

I got them to include extended studs so I can run a strut tower brace aswell as having the camber plates.

[grannyknot]

I think that little crack would only be a concern if it extended to the outside of the valve cover, besides it will be covered in sealant when you are done.  Ask your powder coater to include the valve cover with a couple of other batches that are going into the oven before he coats the cover, it has been soaked in oil for 40 yrs and it will need to out gas in the oven for a while. If the cover doesn't get baked first it will out gas under the plastic coating and you'll have little bubbles popping up through the coating or at least that is what happened when I did it.

[Captain Obvious]

Of course I can't tell without actually seeing it with my own two beady eyes, but I don't think that's a crack. It just looks like a casting flaw.

See if you can catch a fingernail on it... Does it go in (like a crack), or does it actually protrude out?

[Kevin McSweeney]

13 hours ago, Captain Obvious said:

Of course I can't tell without actually seeing it with my own two beady eyes, but I don't think that's a crack. It just looks like a casting flaw.

See if you can catch a fingernail on it... Does it go in (like a crack), or does it actually protrude out?

You are correct, it's more like a scratch, nothing to worry about I suspect. The valve cover is now at the powder coater. Will post pics when it comes back.

[Kevin McSweeney]

Also decided to give the transmission a degrease, clean and power wash this afternoon. Came out pretty good, some before and after below. I know the trans works well so won't be messing with it too much. It's a 5-speed. Just replacing the shifter bushing and boot, and changing the oil. Also have a new mount insulator coming and I had the mount crossmember zinc plated with new bushings.

If anyone can tell me any more about my transmission - what the numbers mean, whether it's original or not, gear ratios, etc. - I would appreciate it. Haven't done much searching on this topic to be honest.

[Mark Maras]

 According to my notes and using the mount on both sides of the tail shaft housing for reference, your trans is a 77-79 wide ratio. 1st-3.321, 2nd-2.077, 3rd-1.308, 4th-1.00, 5th-.864

[Kevin McSweeney]

Valve cover came back from powder coating today. Very happy with the finished product.

[Kevin McSweeney]

Also finished polishing my new brake master cylinder and bolted it back onto the freshly painted brake booster and adapter plate. Need to clean out the reservoirs next.

[Kevin McSweeney]

I was also planning to go with stainless steel fuel tank straps, but decided to be a bit more creative (and save some money for a change) and make use of the fact that I have access to free plating services. Got my old straps clear zinc plated and mounted some new rubber as an insulator. Fuel tank is also freshly blasted, sealed and painted, ready to go back in the car (Not a good photograph but it looks good in person). Looking for a new sending unit but they seem to be hard to find..