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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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vacuum hose goes where???

July 30, 2002 by sac02
1 reply

1.7k views
hey guys, We're trying to get a '73 240z running again after many years of sitting still. The PO had visions of restoring it and did some disassembly and now we have to play connect the hoses without any idea what we're doing. All we have is a service manual (that looks like it's from WWII) with a few pics, and any engine pics we find on this website. Oh yeah, the emissions control system appears to have been mostly removed. 1)The vacuum advance on the distributor: It looks like it should have a vacuum hose attached to it, but it doesn't. Should something be attached here? There is a stray hose on top of the throttle butterfly on the front carb - could we have a matc…

Last reply by Graeme Suckling, July 31, 2002
Radiator

July 25, 2002 by mattymatmat
5 replies

1.6k views
Hey does anyone know where to get electric fans for a early 260z radiator? And perhaps how much it would all cost? I'm told an electric fan can give you a few horsies over the stock fan.

Last reply by mperdue, July 27, 2002
PCV routing

July 23, 2002 by dstrong
3 replies

1.7k views
Okay...so high school auto shop was a long time ago... I had some work done on my '73 a couple of years ago. The major piece was the replacing of the flat tops with a couple of round top SUs. The mechanic also put on a pair of those "Ramflow" air filters in place of the original orange air box and filter. This was originally a CA car and so he also ripped all the emission stuff off...I could finally see the engine! Here's my question...I was under the hood the other day and noticed two things: 1) The PCV hose that terminates into the top of the valve cover is just hangin' at the other end. I assume that it originally attached to the orange air filter box. 2) Bot…

Last reply by skip260z, July 27, 2002
I Need To Know If This Engine Combo Will Work... 1 2

July 16, 2002 by 71datsun240z
14 replies

3.1k views
hey all i need t oknow if this engien combo will work ? and if not let me know what will be needed to get it to work ook? billet aluminum flywheel+stock 7'1 L24 engine+L28d crank+E-31 head+40mm tripple webber carbs+77 280 z 5 speed+perfromance clutch. the part im not sure about is the desil crank? what do i have to do to get the crank to run in my engien what parts am i going to need to build around that and the parts that i have said will they work with the crank? or will i have to start with a l28 engine or can i just bore the l24 to the apropriate bore. plz lemi know thnx what will be needed to do this.

Last reply by shock96, July 26, 2002
My engine rebuilt

July 25, 2002 by guy_geo
0 replies

1.3k views
WELL, what a week.. My engine is being rebuilt this week. It did look as it would be an easy job... Listen: 1. The cam was broken at one end..so we had to fit a new one (260Z) 2. There was a piece of the valve guide that did get loose at one point and was floating on the top of piston #3... but just a small dent 3. The car was running with the head gasket of a 280ZX (NOW I KNOW WHY IT WAS OVERHEATING) 4. My 240Z 72 has flat piston.. not the curved ones on the top.. 5. There was a broken bracket on the radiator (new one and clean-up) 6. My oil pump was almost dead (so I didi put a bigger one from a 28-ZX Turbo) 7. Timing chain had to be changed (the whole kit from…

Last reply by guy_geo, July 25, 2002
260Z cam???

July 25, 2002 by guy_geo
0 replies

1.2k views
Well, to make a short story, my engine was in rough shape... Just want ti know if there is any advantage/disadvantage on putting a cam from a 260Z?????

Last reply by guy_geo, July 25, 2002
Fuel regulator

July 23, 2002 by Akir-ra
2 replies

1.8k views
MSA has a fuel pressure regulator that has been recommended along wiht a newer model electric fuel pump as being benficial in my search for more power on a 74 260 with N42 block.. Any thoughts..?

Last reply by ZmeFly, July 23, 2002
did the engine for the 240Z ever win any awards?

July 23, 2002 by E Train
3 replies

1.4k views
did the 240Z engine ever win any awards? For that matter did the car win any awards? If so can you list them. also where can I find these at. Thanks guys

Last reply by E Train, July 23, 2002
E-31 head.....

July 22, 2002 by 71datsun240z
3 replies

1.7k views
ok so i am assuming the e-31 head is the best head out there for z's right? well i popped my hood of my car to just take a look at the engine and i looked at the lower part of the head and theengine block it was a L24 i saw which was right and then the head was e-31 head and was already on my z?... was that stock or did someone else put that on? and the head cover is unpolished aluminum

Last reply by Ivan, July 22, 2002
Valve adjustments

July 21, 2002 by santamaus
1 reply

1.3k views
Are all the feeler distances and torque values the same for the valve train on the L26 and L24 engines? Thanks, Chris

Last reply by carguyinok, July 21, 2002
L28 rebuilt and 5 speed

July 16, 2002 by thinkmonkey
8 replies

2.2k views
I bought a '73 240 in February and I am race prepping it from the ground up, including stripping the interior and installing a rollcage. The car itself was not pretty to look at, but had a lot of aftermarket items on it that were very nice. The previous owner installed a momo wheel, lowering springs, 3.9 R200 rearend, 80 something zx wheels, miata buckets, and a Nissan rebuilt L28 coupled to a zx 5 speed. I'm building up a 350 for the car right now, so I won't need the engine or tranny. The engine has 11,000 miles on it and is documented, so I'm pretty sure that I want to sell it and the tranny because it is such a strong motor. The camshaft is nice and shiny and when I d…

Last reply by Zvoiture, July 20, 2002
Crank Bushing

July 19, 2002 by Ed
0 replies

1.3k views
How do you remove the pilot bushing on the rear end of the crank shaft?

Last reply by Ed, July 19, 2002