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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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Water pump pulley spacer/shim

April 3, 2011 by BadDog
7 replies

4.2k views
My '73's original radiator sprung a leak, so I am replacing it with an MSA aluminum 3-core unit and am taking the opportunity to replace almost everything else in the cooling system (water pump, fan clutch, thermostat, hoses). Before I removed the fan and water pump, I test-fit the new radiator. Not much clearance: I could barely get my index finger between the center of the fan and the new rad. The blades themselves had a little more room though. I called MSA about the narrow clearance, and they wondered if there was a spacer there from dealer-installed AC (the AC system was removed by the PO many years ago). I saw nothing that I would describe as a spacer until I remove…
Last reply by BadDog, April 4, 2011
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Exhaust EGR plug size for 1978 280Z

March 24, 2011 by dankfrye@charter.net
1 reply

2.2k views
My EGR tube on my 1978 280Z has a bad exhaust leak where it comes out of the manifold. The past owner tried to repair it with metal tap but that obviously didn't work too good. I want to take it out and plug the hole in the manifold. I've done a lot of research on the correct plug size but can't seem to get a common answer. I've heard 22mm, 3/4 NPT Brass and several others. Does anyone know the correct plug that I need? Thanks' Dan

Last reply by ZCurves, April 4, 2011
lead free valve guides?

March 25, 2011 by 5thhorsemann
4 replies

1.9k views
Do the valve guides in 240Z engines require leaded fule for proper lubrication and sealing? Or am I missing something?

Last reply by Jetaway, March 31, 2011
shifter wiggles 1 2

March 29, 2011 by hrvat
13 replies

2.1k views
hey i bought my first 1972 240z. little things here and there need fixing and heres one of them. my shifter is extremely wiggly! i just took the center console out to see whats going on and it seems theres a lot of space on both sides of the shifter. is there anything that shoulda been there, or can i just cram it with spacers? heres the pic

Last reply by psdenno, March 31, 2011
valve noise 1 2

March 28, 2011 by spdcrazy
14 replies

5k views
hey guys, i'm out of idea's here. i have had a bit of a tick on my 77 280z. so i read up, and learned how to do a valve adjustment. first did it cold with the .010 and .012 numbers, so i could understand what i am doing. then did it hot with the .080 and .010 numbers. still ticks. oil is fresh, 5w30, filter is new, 100k on the odo, pulls hard and doesn't hesitate. just annoys the heck out of me!!!! i am beginning to think i am not adjusting it correctly. as in what i think is .010 isn't really .010. so i plan to have a shop that i know about do it again while i watch. is there anything else that it could be? anything else to check? oh and i know its cylinder number 5 or …

Last reply by ChrisZ, March 30, 2011
Master Brake hose for Series 1 Needed! 1 2

September 8, 2010 by esprist
19 replies

2.2k views
Hello, I am looking for new or used condition original vacuum hose from check valve to intake manifold on 1969-1/1971 Datsun 240Z (Series 1) It does not have to be braided ones as long as it is Nissan hose. Any help would be appreciated. :classic:

Last reply by ajmcforester, March 27, 2011
whats a good headgasket

March 27, 2011 by rpmszcar
0 replies

1.1k views
any gasket better than another?

Last reply by rpmszcar, March 27, 2011
Piston rings

March 22, 2011 by T-stone
5 replies

1.5k views
I have heard that if you twist a piston ring you can tell if it is bad. cant remimber if it was supposed to bend or break.. any ideas?

Last reply by Zforce, March 24, 2011
THermagasket, anyone ever try this goop?

March 23, 2011 by 5thhorsemann
2 replies

1.3k views
http://www.rxauto.com/application.htm I have an old Toyota PU with a V6, working on my third blown head gasket in 325K miles. I put the first two gaskets in and they blow in the same place every time. No water in the oil. I don't want to do the job again if it can be avoided and the truck is not worth paying to have it done. So the question is would you go the $113 at the risk of having to do it anyway? So anybody here try this stuff?

Last reply by 5thhorsemann, March 23, 2011
240z Exhaust Header

March 23, 2011 by WDILL
4 replies

1.8k views
Has anyone used the Motorsport 3 into 2 Exhaust Header or the performance 6 into 1 header? I had an exhaust manifold with the smog fittings but must have discarded it since I'm taking the smog stuff off. Leson learned, "Don't discard anything until you really know what you have available to replace it".

Last reply by yellowhammerjam, March 23, 2011
overheating blows

March 22, 2011 by rpmszcar
1 reply

1.3k views
blown headgasket 1977 280z had it all rebuilt 1500miles ago never seem to get hot by what the dash said. bums me out. I drive it everyday since getting it running. now I have to wait,

Last reply by esmit208, March 22, 2011
Where to get 5 speed fiber ring Syncro?

March 18, 2011 by hogie
3 replies

1.1k views
I have a 77-79 wide ratio early five speed that won't go/stay in fith gear. From what I have read that usually signifies a bad syncros, gear/bearing free play, or ball and detent spring. Unfortunately, the kits available from Drivetrain.com and other google searches don't contain the 5th gear fiber ring syncro. I spent awhile at the dealership and they couldnt help either. Has anyone got a lead on that part or will I be stuck rebuilding one of my 3 four speeds? On a side note, I think I have the stock 3.364 rear end and I guess the five speed gearing isn't favorable in that combination.

Last reply by hogie, March 22, 2011