Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,569 topics in this forum
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I had this stock mount modified to use both the stock rubber isolation as well as an energy suspension sway bar bushing (donut) or old valve spring. The stock mounting stud was cut off and a hole was drilled in it's place. Essentially a bolt passes through both plates with the head welded to the top plate. It'll bolt up exactly like the stock mount with the suspension bushing/spring mounted between the nut and the differential cross member. The benefit here is that the top plate can still extend upwards, but is limited by the dampening from the spring or bushing. My hope is that the stock rubber isolator combined with the less compliant urethane bushing/spring will…
Last reply by jmortensen, -
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- 4 replies
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Ok I have NEVER owned an import, and although my 1972 240Z is an import I really don't look at it as one just because of the cool factor it has. My builds have always been old school hotrods. V8 Vegas, Pintos, Gremlins ect. My weak spot is small cars with thumping V8's. However that being said I really don't want to V8 the lil 240. It is just totally new and very cool to me to have a straight 6 in a tiny car. I would like to build a 6 for it. But I have no clue where to start. Do I stay with a L24 or go L28? I want to stay carb'ed and do not want to use puters, ect. That being said I am not looking to get the same performance out of a 6 I would get by shoving a …
Last reply by spitz17, -
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Hey guys. Last night I did a basic run down on my engine. I do it every week to make sure that all the fluids are where they should be and there isn't anything interesting happening that I'm not aware of. Well I come to find that my air filter is rather filthy. I was thinking of switching over to a K&N filter (the one that goes in the stock box). I came across this earlier this morning. Anyone have any issue using the K&N filters? Any drawbacks to using them? Secondly. Can someone explain to me what a BCCD does? For what I remember from reading my FSM (which I can't find now) is that it helps keep idle up when you release the accelerator. Is this true? My Z's id…
Last reply by ozconnection, -
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I got a free 81 280ZX, body was wasted and 1 or 2 gear is bad. Is the lower gearing the same on the 4 speed. I would like to have a 5 speed in my 240. My curent 4 speed is in good shape. Would I be able to put the lower gears from my 4 speed into the 5 speed?
Last reply by sblake01, -
- 11 replies
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Has anyone installed an electric fan in conjunction with the stock fan shroud? If so, what size fan did you use and how well has it worked?
Last reply by twsutt, -
- 5 replies
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I recently replaced the radiator and added an overflow bottle in my '75 280z. After refilling the system with coolant, I took her for a test run to check for any leaks. The temp gauge was reading good - about 5/8ths...then the gauge dropped to the bottom of its range. I checked the connection on the temp sender and topped off the coolant and took her for another spin. Again the gauge was reading good then stopped working again. I let the system cool again and took off the radiator cap to add more coolant, but the coolant was at the top of the radiator. Would an air bubble in the thermostat housing cause the temp gauge to not register?
Last reply by twsutt, -
- 13 replies
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My car has developed a slipping clutch under WOT in 3rd and 4th gear. I have a non-adjustable slave cylinder and the clutch seems to have the proper amount of free play so I dont think that is causing the problem. If I drive it gently how likely am I to toast the flywheel? I would really like to delay changing it until this winter. Also, I can't find any stock style 240z replacement flywheels. Does anyone have any recomendations for one? Should I just spring for a 280 flywheel? Thanks
Last reply by doradox, -
- 9 replies
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I have a '76 280z. It starts up and runs, but I've been having a problem I can't narrow down. Wen the car is running and I press the accelerator, it lags for just a quick second. By lag, I mean, when the gas pedal is pressed, the engine looses a little power and slows down, than resumes as normal. The RPMs go down a little, and you can hear it in the way the engine runs, and feel it. This takes place in about 1-2 seconds. Also, at the same time, but randomly, there is a sort of a low popping sound. But it isn't very loud, it doesn't sound like backfiring. Bad gasket somewhere? This is what I've done to try and diagnose the problem: Oil change (Castrol 10W-30) new oil/air/…
Last reply by FastWoman, -
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- 1k views
Long story. I'm giving my 240Z to my brother who lives in Europe. It has high miles, but runs great. I'm a tech by trade, but not an engine assembler or machinist. I want somebody who has a passion for these engines to rebuild the engine in my car. I'm capable of pulling and installing it. Could do the assembly too, but am time limited. Is there anybody who really cares near me? I am on the coast near Eureka, but Redding/Brookings/Santa Rosa is not out of the question. Thanks Devin
Last reply by 72240Z, -
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does a clsd need to sense torque in order to engage? Was junkyard strolling and found a 85 turbo 300. I jack up the rear and the diff spun as if it was open. I thought the turbo's came with a CLSD?
Last reply by John Coffey, -
- 6 replies
- 1.9k views
Picked-up my rebuilt 77' 5-speed transmission from the shop today. Looks like they did a nice job. They replaced the seals, bearings & syncros. The gears all looked good, and spacing of components between gears, etc, was all within spec. I put together a rpm vs. gearing comparison spreadsheet. (attached). I'll install the 5-speed after the rainy season starts and see how it drives. I don't think I'll need to change-out the rear end, but can do that later, if required. RPM Chart.xls
Last reply by Rick Q., -
- 7 replies
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Hey all, I tried searching a bunch before starting this thread but I still don't quite have answers that I need. I have two engines: Block-l28,N42 Head-N42 (in the car now with SUs) Block-l24 Head-N42 I have to double check the block casting number on the l24 engine but it was out of a 1971 240z. The l28 in it now is showing signs of well... Being a 35 year old engine. I want to rebuild one of these engines but which one? I don't want to do anything that crazy as money is an issue. I read that using some of the parts from the l24 and into the l28 is an idea?? Also, is the N42 a good head? Should I try to look for an E31, P79, etc? Anyone know of an engine shop that ha…
Last reply by 1970Datsun240z,
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