The widths vary between brands.  Just make sure that there is no groove worn on to the sealing area of the crankshaft.  The seal does not have to be worn out to cause a wear groove.  I just did a repair sleeve on a rear end pinion shaft.  Big wide wear groove, not the typical thin seal spring wear.

Oops, forgot a link -

https://www.rockauto.com/en/catalog/nissan,1977,280z,2.8l+l6,1209248,engine,crankshaft+seal,5604

Edited March 1, 20251 yr by Zed Head

Sorry for the delay. The transmission is in, without to much drama. Installed my new Z Story exhaust (Street Sport Header) That went well. Thanks for the tips from @Patcon

But now to the what was I thinking catagory☹️ Went to install my heat shield and it is not going to clear the new header. Should of new that from the start.

So what are my options? No heat shield? If so what do you attach the return spprings to? Does anyone make a shield that will work? (running SU's)

Any ideas would be welcomed. Patcon are you going to run SU's? If so do you have a plan?

Thanks for the help.

Stee

Did you have the headers Ceramic coated? I understand that’s not the issue at hand but will eliminate carb problems.

I did not. Was going to wait and see if there was going to be a problem with the heat.

I did this

Z Car Depot Inc

Carburetor Return Spring Bracket Plate Custom 240Z

Stainless steel plate that mounts under the intake for attaching the carburetor return springs on Datsun 240Z.  This plate bolts to the original intake and allows for 2 spring clips but offers mini...

I also do not have coated headers. That may end up being an issue but I will deal with later if it is

Thanks @Patcon I had not seen that before. It's on order. If heat is a problem maybe we can get a 2fer😃

Jet Hot coatings in SC.

2 hours ago, Yarb said:

Jet Hot coatings in SC.

I believe they're in North Carolina and Oklahoma. My last header was done in OK

North South it’s still Carolina!!😂

On 2/10/2025 at 4:21 AM, HusseinHolland said:

Sorry I wasn't clear - I used 2 short & two long - my pic had 5 - 3 short, but I only used 2 of those. 4 in total

HusseinHolland, where did you get these transmission dowel pins? I can't find any online that are metric. I have a few extra bolts I can use to make my own dowels but would like a set like these.

Not sure but I think that they might be headless head bolts.

On 2/3/2026 at 7:15 PM, 268Z said:

HusseinHolland, where did you get these transmission dowel pins? I can't find any online that are metric. I have a few extra bolts I can use to make my own dowels but would like a set like these.

Apologies - I haven't been on here & didn't see your post

There are Volvo bolts - the long suspension bolts have the dowelled ends. The one of them without a dowelled end is likely a head bolt