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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- 11 replies
- 3.2k views
Can anyone help me diagnose? Thanks to the helpful folks here, I installed a 2nd 4 speed transmission into my car (since the 1st one just decided to implode). Once installed, I backed out of my driveway and all was well (ie: R gear works well). However, as i shift into first and begin to let go of the clutch, the transmission would grind. There would be quite a lot of vibration coming from the transmission tunnel. The grinding only occurs when the clutch is fully depressed. At first, I thought that perhaps this was an issue where 1st gear wasnt fully engaged, so I tried 2nd...but I got the same problem. Caveat: I had a 5 speed tranny in my car, and what I presume t…
Last reply by Bcalvosa, -
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Tranny Oil 1 2
by lenponz- 18 replies
- 3.3k views
I have a 5-Speed close ratio (i beleive) in my 240z. Q: what is the correct oil to use for it? the new stuff sold by Nissan is for the more modern trannys (very lite) but can i use it for this older trans? Any suggestions
Last reply by boro92, -
- 3 replies
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I have my rear spindles over at Andrew Streckfuss "ZCurves" brother's AAMCO putting in the new wheel bearings and grease seals. What is this crap about peening the nut that goes on the stub axle? What is peening? Shot peening is what they do to connecting rods to increase strength. Andrew if you are reading this I had to rob one stub axle nut off the parts car. I need the other one but your brother air impact won't get it off. Sounds like it is one of those things that you don't really need to do to your car, something no shop would ever do on a customer's car.
Last reply by 240260280z, -
- 4 replies
- 1.9k views
Anyone have any problems with these. My original fan clutch gave out after just 239,000 miles. You would think the factory could do a better job than that. I bought a Hayden because I know there a good company with good stuff. I only changed the the fan clutch. This morning after a 15 min. run down the freeway, I pulled to a light and the temp gauge started to climb. This is the first time I have seen the gauge run past mid point. The rest of the system is good, new thermostat, housing, sender, fan belt, 4 core rad, hoses it's all good. The only thing I can think of is the fan is not spinning like it should. Maybe I need to look at a shroud.
Last reply by 240ZGL, -
- 5 replies
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I am currently working at a Nissan dealership and have a good discount on parts through the store. I have now driven several of the 350z's and 370z's around the alot and have really begun to develop a love for them, but I would love to have a classic Datsun 240z (since they are so cheap in my area). So would it be a plausible solotuion to buy a classic Z and fit the motor, trans, computer and rear drivetrain/suspension from a 350z/370z into a 240z? I would imagine that the motor in stock form would provide plenty of power to move the car, and it would help on gas mileage.
Last reply by LeonV, -
- 16 replies
- 4.6k views
I just saw flexible fans in a Jeg's catalogue. They seem to deform at higher RPMS's as a mechanical compensation. I was thinking that this would be a great solution to do away with the failure prone fan clutches ? Has anyone tried these beasties? http://www.jegs.com/c/Fans_Mechanical-Flex-Fans/10115/10002/-1
Last reply by 71ZZZZZ, -
- 5 replies
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So I decided to upgrade my ignition system to a MSD Street Fire CDI ignition, and WOW, what a difference it made. I was running a E12-80 dizzy in my L28 240 and the car was running great, but I kept fouling my plugs b/c I have it tuned fairly rich. I installed the CDI setup to prevent the plug fouling and for the rev limiter, but I didn't expect the increase in WOT performance. The exhaust smells better, the engine sounds more powerful, and there is a noticeable seat of the pants difference. I just wanted to post this for anyone on the fence about the value of a CDI ignition. It is $140 well spent IMO. One thing I found interesting was the change in timing. I had th…
Last reply by 71ZZZZZ, -
- 9 replies
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I finally tore down the engine that came with the 71 240Z that I bought ( It was mounted to a nice stainless steel rolling stand. ) and started to pull everything apart. The guy said it was just rebuilt and had not been run yet. No way was this going in the car without a thorough tear down and tolerance check. This is an F54 block with std 79 flat tops. I pulled all the pistons and started to plasti gauge the center main bearing. I started with green plastic and it did not even touch the cap. ( these are brand new bearing shells ) I went to the red plastic and torqued the cap down to 40flbs. the reading was approx 3/4 of 0.152. approx 0.114. the next were the same, moving…
Last reply by Dobber, -
- 1 reply
- 1.2k views
Why did Nissan fold the sequence of intake and exhaust ports in the centre of the head rather than doing a consistent pattern from cylinder 1 to 6: i.e: E1I1 I2E2 I3E3 | E4I4 E5I5 I6E6 rather than E1I1 E2I2 E3I3 | E4I4 E5I5 E6I6 Having E3&E4 side-by-side in the middle does not seem like a good thermal geometry. As well, consistent port and chamber geometry and intake runner and exhaust runner spacing has been sacrificed... I am curious as to why?
Last reply by Arne, -
- 5 replies
- 2.1k views
I replaced the outer ujoint on the half shaft of my '73 z about a month and a half ago. Today it totally let loose. I can't help but think I did something wrong but I just don't know what. The ujoint was pressed in by a local machine shop and I'm unsure if I should bring it back there. It looks as though 3 of the 4 "plugs" that hold the ujoint in are gone. I found one sitting on the control arm and part of it is bust off. (picture below) Any insight/thoughts on what may have gone wrong would be appreciated so I don't make the same mistake twice. Sorry for the poor photo/video. Couldn't really see anything as it was dark and raining. http://www.youtube.com/…
Last reply by warcmalla, -
- 1 reply
- 1.7k views
Will an L28 engine bolt directly to a original 240Z Automatic Transmission? I am looking to use the Z for Bracket Racing and the automatic trans will provide the greatest continuity between runs. What modification, if any need to be made? I have not seen this subject covered anywhere in this forum. Thank you for your time.
Last reply by ozconnection, -
- 6 replies
- 2.1k views
I removed the bypass oil system from my car yesterday and replaced the filter and oil. i checked the capacity in two locations 5qts. Added this amount and took the car for a short drive, tuned off the engine and let it sit for a few minutes, checked the level and it was above the F mark on the dip stick. What could be my problem ?
Last reply by beermanpete,
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