Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,568 topics in this forum
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The choke cable that attaches to the front carburetor is not returning to where it should after the choke is pulled back and pushed forward again. I tried lubricating all of the joints that the cable triggers on the front carburetor, but it still isn't fully returning to normal; this causes the car to idle higher than it should and will flood the car when it's turned off(unless I open up the hood and push the lever back to normal). Anyone know how I can fix this issue?
Last reply by beermanpete, -
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Getting closer to getting the car on the road, put 4 miles on her and heard a bad rotational sound coming from the rear end. My first thought was that it could be the diff. however i had excess heat on the wheel on passenger side.. must be a wheel bearing. Unbolted the half shaft from the stub axle and this is what i found. This is not right, correct? There was not a axle nut holding the flange on but just this nut, lock washer and a couple flat washers screwed into the axle. Anyone have a direction i can take to source a stub axle? Thanks
Last reply by Robin, -
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trying to set valve lash. a couple of things: 1. can't get one valve (exhaust) lashed wider than .007 (trying for .010); can this be resolved by anything other than replacing with a smaller lash pad? doesn't this seems like a strange problem; how does the previous owner get all but one valve right? 2. i believe i have a schneider stage iii cam - is anywhere on the 180 degrees of the heel of the cam "heel" is ok to set the lash? does it matter if its not TDC, or the lobe center isnt pointing towards the sky? The reason i ask is that it feels like maybe the lash is changing even when i am on the 180 degree heel arc...is that possible? 3. most importantly, how do i repl…
Last reply by fastd, -
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Last year I rebuilt my carbs with a ZTherepy kit and couldn't be happier with the results, very high quality product and informative video. My vacuum gauge is reading a steady 19 at idle and the car performs well and my plugs look good (not rich nor lean). The main issue I've had is that when I adjust the SU's to allow for the pin lift test to work (slight RPM increase then return to normal), I need to richen the mixture so much I get a big cloud of black smoke out the exhaust and the vacuum gauge lowers to approximately 12-13 and the engine runs rough. I recently removed my emissions gear (smog pump, dashpots, etc.) and closed off all of the vacuum ports to ensure I d…
Last reply by Jarvo2, -
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Hello, I own a 71 240z and the L24 is in need of a rebuild. As luck would have it, I came across a 1984 maxima at a junkyard that had the high quench N47 head. Since this head had many of the things I would need to do to the e88 (steel valve seats, high quench design for detonation resistance, EFI notches, etc) that it would be a better starting point. Since L24 builds have fallen out of fashion there isnt much info on building them specifically. While researching i came across HS30-H's information on a High Po L24 that was slated to be used in a high performance model S30 that was never released. http://www.classiczcars.com/forums/open-zcar-discussion/25575-datsun-240z-…
Last reply by s30zgt, -
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Hi all, I thought I'd share a write-up I did on my recent clutch repair. Not a how-to, but more of a what's up, it still might be of interest to my fellow Z fans. Our Cars- The Datsun Project Update*|*Hooniverse
Last reply by Graverobber, -
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I'm sure this has been covered in other help me threads, but I've read through a dozen or more and have consolidated all of the information that pertains to my setup. I'm beginning to wonder if perhaps my distributor is going. Any advice is welcome, I appreciate the input. The problem that I'm experiencing is while the car is occasionally very smooth up to 6500rpm or so, after a few minutes of idling, it'll become jerky and misfire. The problem seems to have no easy cure. Sometimes if I shut it down for a few minutes, everything is fine again, sometimes it's the opposite. I assumed fouling from carbon may be causing this, since when it runs poorly, it will occasionally gi…
Last reply by oranngetang, -
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I went to the local AP store (Advance Auto) to get a new condenser for the ignition system, and after fooling with the computer, the sales guy tells me there isn't one for my engine or any old vehicle. I looked up myself on the company's website and found one that looks like what is on my engine, and again the sales guy says there aren't any, when I give him the part# I wrote down. Even MSA and BD don't seem to have them, unless you own a 240Z, and you can get a condenser with a set of points. Finally, he found one. Then he tells me they don't carry parts for old cars because it doesn't make "good business sense."So now all those old classic cars you see at car shows …
Last reply by beermanpete, -
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I'm going to fuel injection and I'm told the RB26 TB will bolt right up to my Weber manifolds...
Last reply by surfer.tech, -
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Hi all, A quick question regarding my B-model four speed. I pulled the transmission last Saturday in order to replace the clutch which had failed (throwout bearing really) and in giving the box a once-over outside the car I discovered a second electrical switch up near the shift mechanism. I'm including a pic below. The box has another two-wire connector just aft of the clutch fork, which I know is the reverse lights switch, as I had no reverse lights until I connected the loose wires to that. What I'm wondering is what is that other switch, or whatever it is, up by the shifter? Also, has anyone ever pulled a transmission and found the throwout bearing collar to hav…
Last reply by Captain_Zeros, -
- 46 replies
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I was going to visit a friend on a mid 60's degree blue afternoon. And car was running great. At the light where the car had been running perfectly, it just turned off. I mean just stopped cold. Would not crank to save my life. I pushed her off, and noticed I still had 3 psi of fuel pressure and the car cranked well. Oil pressure and temp were spot on. So this leave ONE thing. Electrical. I am betting my bottom dollar the ignition module in my Mallory just up and died for some unforseen and unpredictable reason. That is my first guess and where I will start the investigation. However if you guys can come up with anything else, ANYTHING, let me know. 45 minutes late…
Last reply by Stanley, -
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I removed the head the other day and i noticed that the little groove on the end of camshaft did not match one on cam sprocket. It was eeny weeny to the right, less than half inch. So i wonder should i install the sprocket so that the both grooves match perfectly? Or is it just the chain that has loosened over time?
Last reply by Reverend,
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