Datsun Roadster Forum-311s.org

rwmann wrote: Fri Aug 27, 2021 3:08 pmFuel leak?

Yep...fitting was only finger tight. Not my noise though..

Today is looking like drop the pan day.

cbez wrote: Fri Aug 27, 2021 12:35 pm https://vimeo.com/593402988

Was expecting a little more top end oil action with it running valve cover off …

Wow, that’s not normal at all. Assuming there are no blocked passages, I would immediately do another oil change (I know you just did one) using a good 10w-30/40 synthetic oil and a quality filter (K&N always works for me, the welded on nut is a god sent for big ape like hands) - You might just have a bad oil filter that’s restricting flow or sludge build-up. For badly blocked passages (bad sludge build-up), I’ve always used the diesel fuel oil flush method on my past ‘classic’ cars. But fist thing first - Oil & filter change!

I have some 10-30 vr1 ready to go in and a Nissan filter. Rear of oil pan was leaking anyway so needed to do it.

I really have to think an oil change is not going to fix it. Seems like something is plugged up from sitting.

Yeah, was sitting but also running good and quiet for a while, so maybe something in the meantime..

Well not looking great guys, fairly significant amount of metal down in the pan..

cbez wrote: Fri Aug 27, 2021 4:55 pm Well not looking great guys, fairly significant amount of metal down in the pan..

Sorry for my ignorance, what are those coil looking thingy's on the rags?

DAC21 wrote: Fri Aug 27, 2021 5:10 pm

cbez wrote: Fri Aug 27, 2021 4:55 pm Well not looking great guys, fairly significant amount of metal down in the pan..

Sorry for my ignorance, what are those coil looking thingy's on the rags?

Just magnets I fished metal out of the pan with.

DAC21 wrote: Fri Aug 27, 2021 5:10 pm

cbez wrote: Fri Aug 27, 2021 4:55 pm Well not looking great guys, fairly significant amount of metal down in the pan..

Sorry for my ignorance, what are those coil looking thingy's on the rags?

Wholly crap! Will be interested to know what went south. So sorry, looks beyond bad, hopefully not a I need to find a new motor bad.

Sigh, that really sucks. Pan drop will probably not be enough. I would yank it and put it on a stand.

Well, I don't see anything egregiously bad in the bottom end but I'm far from a r16 expert. Maybe the eagle-eyed will spot something. I was planning to check the torque once everything is cold. What I can see of the chain and sprocket look ok. Distributor gears look good. Cam lobes look ok. Can still see hatch on the cylinder walls. Rods seem to have the normal amount of end play. Obv I have some contact between my header and the pan.

Is it just me or do those rod bolts seem long or the nuts short? Metal pieces came from somewhere.

So you pulled your oil pump as well? You work quick.

Are those two holes side by side in the 2nd, 4th and 5th picture of the crank oil throwing features?

Yes, oil should be splattering all over the paper towels from the rockers.

There isn’t much to block oil transfer between the block and head…(unless someone messed up something kinda badly). Maybe the rocker assembly is clogged or has a problem…I’d suggest the following:



Remove the spark plugs.
If you have an electronic distributor, disconnect that. (No issue with points)
Loosen all the rocker arm adjusters to relieve spring pressure.
Remove the rocker assembly (the 4 large bolts on top of the pedestals).

You will see the oil supply galley to the rear most pedestal back by the rearmost
bolt.

Put a big rag over that hole and crank the engine. A lot of oil should come out of that rear
supply hole (that’s why the rag).

If lots of oil, it’s a rocker shaft problem-relatively good
If very little/no oil, the problem is likely below the head-not so good.

Best of luck, let us know what you find.

Addendum: sorry I wrote this before seeing all the oil pan removal stuff. You can either reassemble and test the above, or pull the engine and start complete disassembly looking for assembly errors and problems.

Thanks for all the advice so far guys.

Tried turning over by hand some to see if I heard anything. I do notice that some of the springs 'pop' when they decompress. Not sure what would cause that. Tappet??

https://vimeo.com/593556568

other thing I found was what looks like damage to piston 1. That would certainly account for a lot of metal in the oil...



I think I'll pull the head and look since a lot of the steps are needed for a full engine pull anyway..