Datsun Roadster Forum-311s.org

Hi,
Trying to put my 1600 back together, could anyone provide some insight into the correct setup for the gears on r16, found for u20. Crank TDC chuck is straight up, what should the Cam gear be set to? Are the dots on each gear suppose to be at each other or opposed? HELP.
Thanks
Trevor in Phoenix

Well, let's see--it has been a while since I did that but #1 should be at top dead center with the crankshaft key up. The dots on the crank and cam shaft pulley should line up across from one another. You should be good to go. You can also use the links but lining up the the dots is easier and works great.

Steve

Turn the crank until keyway and #1 piston at TDC.

Assemble the spockets to the chain and align the 2 chain marks to the camshaft gear mark and the crankshaft gear mark.(keep marks to right hand side)

Rotate both gears ,(while maintaining them engaged to the chain), until the gear marks align to face each other and the crankshaft gear keyway pointing at TDC.

The camshaft can now be rotated to align its key with the keyway in the camshaft gear.

Slide both gears on simultaneously.

If the installation was done correct, the spocket marks should now be facing each other and aligned between the shaft centers when #1 piston is at TDC.

Now you probably will have to take them off to because you forgot to put the oil slinger behind the crankshaft gear.(dished side facing to the front)


Ray B.

This is also a good time to make sure the Dizzy drive shaft is in the correct location..you'll be glad you did!

Matt

You betcha! I still dont have mine in the right place, its off by a tooth. Its off timing by very little.

Joaquin

Thank you guys, very helpful been some trial and errors on this.
FYI: 66 Roadster matching numbers, hand me down. Pulling the engine apart due to overheating, found all standarnd, nothing turned. AMAZED

Overheated due to that *^#% longer bolt on head, now trying to find and engine hook, to put in?

well, not sure what you mean by "longer bolt on the head" but one of the head studs is longer than all the others to accomadate the engine removal bracket. Also, when your all ready to fire it up make sure you have a new cap on the water filler. This way you'll never know if that was the only problem.

itsa68 wrote: Now you probably will have to take them off to because you forgot to put the oil slinger behind the crankshaft gear.(dished side facing to the front)

Ray B.

My brother called me frantically asking about this. He just finished rebuilding his R16 into a stroker. The oil slinger does not go behind the crankshaft gear. It actually goes in front of it after you fit the timing cover on. Right behind the crankshaft pulley. My brother almost tore his motor apart to make the fix. It actually goes like this-crank gear shim, crank gear, crank shaft oil thrower--then the timimg cover, crank shaft pulley, lock washer and crank bolt. I am pretty sure that is correct. My brother has 5 to 6 hours of running on his motor and all is fine. Maybe Ray B. meant pulley instead of gear??

Steve

Steve,

That does not sound right to me. The purpose of the oil slinger is to reduce the amount of oil that is trying to work it's way out of the seal. That being the case, it should be behind the timing cover - the last thing on before the cover bolts on. It is sort of like the flange that is machined into the crank just before the rear seal. They act to deflect the oil and keep as much of it away from the seal as possible to reduce the work load on it.

I stand corrected as the oil slinger does go behind the timing cover. It definitely does not go behind the crank timing gear though.

Steve

Sid is correct on the placement of the slinger

My mistake
I was thinking shim, but had a mind fart, and then fingers went into a typing frenzy about the oil slinger.
I'll have to proof read my posts from now on and open the manuals more often to keep my memory in check.

Sorry about the misinformation.
Ray B.

What does the oil slinger look like? Anyone have a pic they can post?
Thanks,
RE

Here is a black and white from the parts manual



Steve

Thanks steve,
Just replaced my tensioner on my 1600 and I dont recall seeing that part. Would the elimintation of the slinger allow the crank gear to move forward or backward on the crank itself?