oil pan heat shields

Guest · Post by **Guest** » Sun Oct 12, 2003 3:34 pm

Well, I have to turn to all of you "Roadster Gurus" for help. I finished rebuilding my '68 1600's engine, and I can't figure out where the two heat shields, or whatever they're called, that go on the oil pan. I don't remember which way they go either! Some of the pictures I've seen, seem to have the carbs' overflow tubes going through one of them (but again, these pictures also have the alternator where the air pump goes in my engine!)

Please help! I also have problems installing the shims that secure the rear brake cylinders...old or new, they keep splitting open and not too secured! Thanks!

Jorge
Torrance, CA

Post by **S Allen** » Sun Oct 12, 2003 9:01 pm

Not sure what heat shields you are referring to. There are none on the oil pan. There is one that attaches to the intake and shields the carbs from the heat of the exhaust. Send us a picture please?

As to the rear brake shims-they need to be put back in the proper order or they will not hold. (Guess you found that out!) Here is a picture of the rear wheel and the proper order for the shims. Do it like this and they will hold. Go here to view the picture. http://www.311s.org/Pics/rearbrake.jpg

Steve

Russell Roach · Post by **Russell Roach** » Sun Oct 12, 2003 9:18 pm

Jorge,

Like Steve says gotta put them on in the correct order, don't worry though once on they work really well for a flimsy design. I hammer the brakes on my vintage racer on a regular basis and they don't dissappoint.

Good Luck

Russell

Post by **spl310** » Mon Oct 13, 2003 1:10 pm

The heat shield is there to protect the oil pan and the motor mount from the stock manifold. If you have a header, you cannot use it. There is a metal bracket that goes under the mount on non-smog cars that one end bolts to (the stock motor mount on smog cars has the bung for the mounting) and the other end bolts to the exhaust manifold. The unit is two pieced. One is sheet metal and the other is a thick metal strap. The strap is a reinforcement. If you loosely put the strap in place, you can probably figure out the sheet metal piece. The narrow end goes between the header and the pan gasket.

Post by **S Allen** » Mon Oct 13, 2003 1:37 pm

Well, as usual I stand corrected on the heatshield question. I had never seen one on any of the roadsters I have had. --but that is a rather limited number to begin with. Thanks Sid for the correct info.

Steve

Guest · Post by **Guest** » Mon Oct 13, 2003 2:43 pm

Thanks Steve, Sid, and Russell. I will try to e-mail you a picture of the oil pan "unknown" pieces....I was putting everything in pre-labeled zip-locks as I dismanteled every part of the engine, and these i remember taking out and putting in the oil pan bag. Maybe I'm naming the parts wrong. I'll take some snaps of them, and again, thanks for the help...as to the brake shims......I'll keep you posted on the outcome once I get down and dirty!

Jorge

Post by **spl310** » Tue Oct 14, 2003 7:52 am

Steve,

I was not trying to one up you there - I read it that you were not familiar with the parts. The vast majority of Roadsters out there (and owners as well) don't have those parts. If you go to Gordon Glasgow's website you can see a pic that sort of illustrates the way that they go. Not the best, but it is the diagram that Nissan used. The link is http://www.gordon-glasgow.org/Images/5-1.gif

Best of luck!

Post by **S Allen** » Tue Oct 14, 2003 9:11 am

Jorge sent me a couple of pictures of the oil pan heatshields. Again, I have never seen anything that resembles them on any roadster I have had or taken apart. Sid, any ideas? I did go to the diagram of the intake on the later cars and they did have a bracket that looks similiar to these for the carb overflow tubes.

There is one more picture here http://www.311s.org/PublicPics/bracket2.jpg

Steve

Post by **spl310** » Tue Oct 14, 2003 9:39 am

Wow! Those are rare parts!!! They are the brackets for the lower end of the overflow tubes. They typically get thrown away when the pan is off for whatever reason. To give you a frame of reference, I have 8 Roadster motors in the garage at the moment (more or less) and only have on pair of these. They were only used on the pushrod motors to my knowledge. As to exactly which bolt hole they go on, I cannot say at the moment.

If you are using the solid overflow tubes, you want to use these. They use a rubber grommet in them and the overflow tube goes through it - it acts as a vibration isolator. Without these, the solids overflow tubes tend to break off from the vibrations.

Guest · Post by **Guest** » Tue Oct 14, 2003 2:47 pm

Steve and Sid:

Once again, thank you for your valuable help. I just found an old picture that actually shows, as you said, the overflow tubes from the carbs going through what seems to be my two brackets.

Although I can say that this car has 99% of the original hardware still, it seems like someone cut the overflow tubes because they are probably 6-8" long......which means draining right on the exhaust manifold! What advice can you give me?.......new metal ones, or replace them with a different material?

Jorge

Post by **spl310** » Tue Oct 14, 2003 3:35 pm

Well, that depends on what your plans are. If you are going show car, replace them. If you are going driver, keep the short ones (sounds like they were replaced by ones for a 2000 engine to me...) and attach rubber fuel line and route them down away from and below the level of the header to prevent any fires.

Post by **S Allen** » Tue Oct 14, 2003 8:54 pm

That is what this is all about. Glad to help. No silly questions here. I learned something again today as I had never seen those critters before. As Sid said, I use a length of rubber hose to direct the fuel should your floats stick away from the exhaust. --And stick they will at some point.

That would be one heck of a fire. I run all three roadsters that way.

Steve

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