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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I have a 72 datsun 240z with dual weber 32/36 dgv carbs. We ran it a couple times when we tried to drive it with dirty carbs. When we took everything apart and cleaned them, we started it and it went straight up to about 3500-4000 rpms. We checked all the hoses and lines but we couldnt find out why it was doing it. Any ideas?
Last reply by beermanpete, -
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Well first of all I got a 2.5 inch msa header and complete exhaust system just installed. Before I blew it apart it ran good. Now I have trouble starting it, idle is not consistant, it stumbles when you go to rev it, and also when I go to take the #2 spark plug wire there is little change in the idle. When i go to take off the #3 spark plug wire there is no change. Also before I took it apart my electric fan and fuel pump worked fine and now when you turn on the key it does'nt come on at full power. I'm a newbie so any helpwould be greatly appreciated. Thanks, Chris P.
Last reply by Kurbycar32, -
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Hello,,,new to the z world and need to pull a engine from a 72 for a friend...My question is, do you have enough room to move the engine forward after removing all bolts from bell housing to clear the imput shaft from the clutch ....OR is it like jags that you need to remove the engine and tranny as one unit? THANK YOU!
Last reply by beermanpete, -
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My temp needle has always hung a bit to the right of the centerline on the dash gauge. Even though I have a high capacity aluminum radiator, my car always runs a bit warm, about 200 degrees F when measuring coolant temp in the radiator. I finally decided to do something about it. So I bought a new 180 degree thermostat from MSA. To verify things were operating correctly, I removed the existing 190 degree thermostat, cleaned it, and put both thermostats in a pan on the stove. I suspended the thermostats on a piece of wire so they didn't touch the bottom of the pan. The 180 didn't open until 189 degrees, and the two year old 190 didn't open until 198 degrees. Sin…
Last reply by Oiluj, -
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I wanted to talk about spark plug wires for a while. I had a set of Taylor wires on my car forever. They worked fine, but since then I have been through the gambit of wires and long story short, I have 5 sets I need to be rid of. How does one come across 5 sets of spark plug wires...humm... How do I tell this story without sounding like a tool. Well guess I just better come out with it. My car started with blue taylor spiro pro wires. They worked great on the OEM dizzy. BUT I did not like the blue. So fast forward later I bought a set of OEM replacements thinking they would be black like in so many pictures I had seen. Well the NGK's wires that came in were not bla…
Last reply by Oiluj, -
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Hi Everyone, I'm driving an early '73 240 with the original engine. Its dual carb'd, I'm not positive which brand - but I know they aren't stock. When I bought it in July, it did 0-60mph in about 8.5 seconds, which is a little slow, but that probably had more to do with my driving skill, and got to top speed almost too easily. Now its 0-60 times seem awful and it has a rough time getting past 85mph. I put some high performance injector/carb cleaner in and it seems to run a little better, but not like it did. Also, I don't know a lot about idle speeds, but I know that most cars run idle at 600-1000rpm, except those that are modified for high performance, and may behave odd…
Last reply by ninjazombiemaster, -
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I dropped my trans in my 240 to replace the rear main and discovered that my flywheel needs to be replaced. Searching the internet, I have found resurfaced flywheels, factory replacement flywheels and performance flywheels. My question is which one should I buy? The car has a built L26 and a 4 speed which I am thinking on swapping for a 5 speed. Also, what clutch should I use.... the Centerforce clutch i put in years ago still looks good And I need to do this on a limited budget...
Last reply by 73 240Z Man, -
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I'll start by saying I am a huge fan of mechanical gauges, and always hold the electrical gauge readings suspect. I will also say that having the mechanical pressure gauges (fuel and oil anyway) in the car with me will not happen, a tubing failure or broken bourdon tube can cause a mess on an oil gauge and a blow torch on an illuminated fuel gauge. So earlier this year I put a cowl induction scoop on my damaged hood to forever rid myself of the vapor locking problems with the 240. I don't really like the hood as much as the stock look (which I love) but it did the trick. So now I have my mechanical water temp and oil pressure installed, waiting on the third cup to add t…
Last reply by 5thhorsemann, -
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Last weekend i removed the engine/tranny from the car and im swapping 77 5 speed. BUT they seem to have different kind of release bearings. Smaller is from 5 speed and bigger from 4 speed. Will the 5 speed bearing work fine with L24 clutch? I have new exedy clutch kit for 240z...
Last reply by Diseazd, -
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Rebuilding an L28 and I chipped off a piece of the damper closest to the crank. Can I have my machinist repair and rebalance this damper or will I need to look for a new one? Thanks.
Last reply by EuroDat, -
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My car is hard starting, especially when cold, but seems to run fine a minute or so after I get it started. The other day I was going to do some work on a fuel line and when I went to depressurize the system, there wan't any pressure. Does it sound like my fuel pressure regulator could be bad allowing fuel to too easily run back to the gas tank and not maintaining pressure in the system? I don't know where else the pressure would be "leaking" to since I don't smell gas or see any actual leaks. Thanks Gary
Last reply by siteunseen, -
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just curious about what im working with. the engine work was pre-me, wondering if its necessary for premium fuel, the previous owners mechanic said it was a big cam, and while it sounds mean with the header and big exhaust but i dont feel it. also, ive noticed a bunch of you using 20w50 oil, is there a reason why so heavy a weight? im in hawaii so i dont have to worry about starting under 60 degress:) but i dont want to ruin my engine with overly thick oil.
Last reply by EuroDat,
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