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Engine & Drivetrain

Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.

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Anyone ever tried a 195*F thermostat?

March 3, 2020 by grannyknot
1 follower

6 replies

728 views
A friend bought this 280z recently from a guy in Georgia and the temp gauge is too low by my thinking after a hard drive, I'm guessing PO put a 160*F thermostat in. My local Nissan dealer won't order in a thermostat but I found a Stant 195*F , wondering if it is worth a try? I thought I had a spare 180* but can't put my hands on it. Thanks
Last reply by 240260280, March 4, 2020
2.4 with 5 speed and round top SUs. $350

February 29, 2020 by siteunseen
2 followers

8 replies

1k views
The carbs are worth $350. https://orlando.craigslist.org/pts/d/orlando-datsun-240z-l24-engine5spd-trans/7083471590.html
Last reply by Patcon, March 2, 2020
bounceing tach after msd 8920 hookup? 1 2

February 28, 2009 by kully 560
1 follower

17 replies

5.4k views
I have a early 1974 260z with e12/80 dissy .installed the msd 6a with the blaster 2 coil .could not get the tach working with the msd 8910 so I pickup the msd 8920 tach adaptor. tach works but there is a little bounce there and also when the headlights are turned on it stops for a moment. I hooked up the msd 4 wire tach adaptor as follows black ground, red 12v switch power, violet to blue wire from wire harness in car which is the tack wire, white to white wire from msd 6a and also connects to c term. on e12/80. msd is closed today . is this the correct hookup thanks kurt

Last reply by Firepower, February 28, 2020
Transmission rebuild NLA parts recommendations?

February 23, 2020 by chaseincats
1 follower

5 replies

1.5k views
Hey gang, now that we got the shifter pin out, I'm putting together my bag-o-parts to reseal this transmission and have everything except for 2 bits which are NLA. - main shaft nut (right hand threaded one which is a 280z trans only part) - part number 32354-a7400 - reverse switch o-ring size 22x2.5mm - cant find part number Anyone have a source for these or know if they're really necessary?
Last reply by Patcon, February 25, 2020
78 280Z rear axle hardware

February 21, 2020 by One Way
1 follower

2 replies

559 views
Just beginning the resurrection project on the rear axles and related components. Removing the outboard axle nuts required some heat-red hot- to break loose after 40 plus years. I know new nuts and lock washers will be required, but what do you think about the bolts? The J.I.S. M10 hardware is a bit difficult to locate-14mm hex size-and the taller height nuts I believe will work in that spot. Interference nuts or regular nuts with lock washers? Just looking for recommendations on the best hardware options. I have got the new rubber boots and clamps already and will be pressing out the u-joints as time permits to size them up. Surprisingly the u-joints still feel pr…

Last reply by One Way, February 22, 2020
280Z early 5-spd 1st gear

February 19, 2020 by gnosez
1 follower

10 replies

1.1k views
So, this is a first for me. Has anyone else seen on of these?

Last reply by Zed Head, February 21, 2020
Removing Intake Manifold Heat Shield 1 2

February 16, 2020 by ea6driver
3 followers

14 replies

2.8k views
I've successfully removed all the bolts securing this heat shield to the underside of the intake manifold, but it seems as though the EGR pipe (the pipe that is connected between the intake and exhaust manifolds) is blocking the heat shield from being able to be removed from the engine. I tried for several minutes trying to wiggle the heat shield out, but with no luck. The next logical step would be to remove the EGR pipe to get it out of the way, but everything I've read on this forum indicates that loosening the bolts that secure the EGR pipe is damn near impossible. Am I missing any trick to getting the heat shield out with the EGR pipe still installed?
Last reply by siteunseen, February 18, 2020
Crankcase to PCV Valve Hose 1 2

February 11, 2020 by ea6driver
3 followers

17 replies

1.8k views
Was this hose originally painted from the factory? I removed this hose recently as part of an overall engine "clean up" project and noticed that it appeared to have been painted a silver color. Well, thinking that it must have been painted that way by a prior owner, I dutifully removed all the paint with a solvent. Then, while perusing numerous L28 engine photos posted online, I found several that displayed this hose seemingly painted a "silvery" color... Just wondering if it was originally painted from the factory (and why). Thoughts? Also...it appears to be somewhat "clogged up" with "gunk"....how would you recommend a thorough cleaning of it?
Last reply by ea6driver, February 13, 2020
Diagnosing Valve Train Noise 1 2 3

April 13, 2014 by Mixelplix
1 follower

26 replies

8.9k views
While slowly reconditioning my early 74 260z, I decided to do a valve lash adjustment. After I was done I was able to notice a significant valve train noise somewhere around cylinder 5 or 6. The noise is sharp and follows the RPM. It's the same hot or cold. With a stethoscope it appears to be more loud on the passenger side. It makes the noise regardless if the spark plug wire is plugged in or not. I've triple checked the lash both hot and cold. And they're extremely close to perfect at .008 intake / .010 (cold) and .10 intake / .012 (hot). My oiling bar is recently cleaned and silver soldered by me, and I visually verified that it is working (what a mess). I believe…
Last reply by Zed Head, February 7, 2020
HELP PLEASE!!!Need to find TDC with no regular indicators 1 2

January 26, 2020 by zdude1967
1 follower

23 replies

2.1k views
Here is the situation: Engine was rebuilt the cam timing chain gear is not the standard with the notch, the car doesn't have a timing tab and the dizzy has been set wrong so how do I find TDC with tis situation. Can I remove the valve cover, rotate the engine by hand until I get one of the pistons to the top of its stroke. Then rotate that one through its 4 cycle stroke until i find the pattern of intake opening at the top of the cylinders stroke, closing until exhaust valve opens coming up exhaust stroke and find the 1,53,6,2,4 pattern of this then rotate the engine through to go back to # 1 and set it at TDC. I may not be explaining this clearly but I would be happy t…
Last reply by zdude1967, February 2, 2020
240z overheating at idle in traffic lights and intersections 1 2 3 4 12

December 31, 2015 by Johnny wick
3 followers

134 replies

23.5k views
Okay, finally decided to pick up my1972 240z from the mechanic. Charged me US$160 for changing the fan clutch, thermostat, wrapping heat shield cloth on the fuel lines and replacing wáter pump. He also changed the exhaust manifold pipe gasket. Car timing was set at 10BTDC. Car ran fine. No backfire either from intake or exhaust. However, once i reached home while playing with the car stereo temperature started to rise until reached 3/4. RPM dropped from 1000 to 500 and then raised to 1000 again. A few seconds later it stalled and i had to crank it again. It does the same at intersections and while at idle on traffic lights. Took out all plugs and cleaned them. I guess i w…
Last reply by Johnny wick, January 23, 2020
5 speed worn bushing prevents reverse? 1 2

January 15, 2020 by Civilizedape
2 followers

13 replies

1.7k views
I have 5 speed transmission that is giving me trouble. After a rebuild it is really hard to get into reverse and if it does its gets stuck there. After taking it apart and putting it back together a couple times I noticed a lot of play in the shift linkage. Has anyone dealt with this? I assume next step is get a new bushing pushed in.
Last reply by Civilizedape, January 20, 2020