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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- 13 replies
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My 1973 240z (2.6L engine; no smog equip) initially starts and runs normally. It runs fine for 5-10 minutes then, for lack of a better description, the engine starts cutting out at about 65 mph (any gear). I can hear the carbs "sucking air", but it seems to be starving for fuel and/or spark. With the clutch depressed, it will rev to ~4,000 rpm and again cuts out. It gets progressively worse until pull off the freeway. Once I get off the freeway and drive on the side streets, it seems to work fine again so long as I dont get above ~45mph. Also, it then rev's all the way to redline as if nothing was wrong. I'd sure appreciate any suggestions before I go buying fuel pum…
Last reply by Curtis240Z, -
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- 3 replies
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this is a newly rebuilt engine with a rebuilt head bought off of ebay from datsun parts LLC (yeah, i know, big mistake). first the symptoms: when i start her up, she roars to life and seems to run smoothly for a minute or two. then suddenly the engine will start loping heavily and the whole thing will jerk rhythmically to the right. if revved, it smooths out a bit, but often backfires. my vacuum gauge needle jerks into "Late Valve Timing" every time the engine lopes. on the first few startups, the loping will worsen until the engine dies. once the car has been started several times, it will lope badly but stay running. here's a video (you'll need audio obviously): http:…
Last reply by 70 Cam Guy, -
- 11 replies
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I want to build a NA motor for my 73 240z. Of course I am on a budget and not only that, I came from the Honda community with 13 years of building NA motor knowledge and experience. So I'm accustomed to fast natural aspirated Honda's. But old skool Datsun's is entirely new to me. I am seeking for suggestions on the best NA motor to build. Reading some stuff about the L28 blocks, sticking with the same Head and I don't know what else. Pros, please enlighten me and give me pro advice...thanks a million!!!
Last reply by YawnTee, -
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I just removed the smog stuff (pump, all the stuff on the balance tube, air galley and replace the exhaust manifold with headers) on a stock '70 S30 motor. Do I need to change any of the settings on the carb or timing after eliminating the smog stuff?
Last reply by zmadnez, -
- 15 replies
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Hi all, I had bookmarked a part number reference on the web, but it's down. I need to install a generic EGR valve on my '78 Z, but I have to fit it with an orifice washer corresponding to the OEM part number, which of course I can't find. So what's the OEM part number of an EGR valve for a '78 Z? Failing that, what's an alternative online reference to this one? http://carfiche.com/fiche009/s30/ Thanks so much to anyone who can look this up for me! Peace, Sarah
Last reply by FastWoman, -
- 9 replies
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Hey guys I have notice my oil gets dirty very quickly. I put in a new engine about 2500 miles ago. I knew i would have to change a couple of times but i thought i was through that. I changed it at about 250, then about 1000, and finally at about 2000. I wouldn't have changed it the third time but it was pretty dirty oil. Now again it is dirtier then ever. I am driving long distances so I can't risk it. Why would it be getting this dirty this fast? Just typical new engine break in. It was pretty tight when i first put it back together. Any thoughts appreciated. Frankie
Last reply by Frankensteinz2, -
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Ok, I'm searching for a source for my last major component for my engine rebuild and need to know where I can get a good set of 6 KA24E pistons from at a good price. Per Zhome.com the part number on this is 12101-40F10.
Last reply by texasz, -
Antifreeze 1 2
by JoelZ- 14 replies
- 2.2k views
I recently bought a 280Z and I am having a problem with the antifreeze/coolant. As I drive the car there is no issue with the temp or anything, but after shutting off the car, a few hours later there is antifreeze on the garage floor. When checking the radiator/reservoir, the radiator was not full to the top and there was just a little in the overflow container. I had the car to the mechanic today for state inspection and he said that he could not find any evidence of antifreeze leaking. I am wondering if it is coming through the overflow tube on the reservoir container? But why would this happen if the radiator was not even full and there was not much in the reservoir. I…
Last reply by Pomorza, -
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Hello all So I've owned my Z for about three months now. In complete love with it but I'm having a bit of an issue with it. When I try to put the car into second gear I *sometimes* get a weird buzzing sound. Sounds really like something spinning or something. I also get this noise sometimes when I revv the engine with the clutch in all the way and the car in any gear (but 1st and 2nd as I'm slowing down). I've been told it could be the throw out bearing but a friend of mine that owns a Z. Not sure if the bad tranny mount has anything to do with it. Any advise is appreciated. Jan. P.S Forgot to mention what occurred on thursday. I usually don't do this but I happen to hol…
Last reply by FastWoman, -
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I am about to install a new thermostat housing in my '76 280z. I thought it would be a good idea to check here and see if there is anything else I should be doing while I'm at it. I am going to replace the current thermostat with a 180 degree thermostat from thezstore.com. So I guess Im just curious to know if there is any thing to be done in addition with this small project? Thanks everyone! John
Last reply by JohnnyP, -
- 5 replies
- 1.6k views
I notice when I pull out of 5th gear I tend to grind a little because I slightly tap reverse before I get into the neutral position and have realized this is because the shift lever won't return to center when I pull out of 5th and let go of it. It doesn't return to center from other gears either. Looking at the Haynes manual there is a return spring plug and return spring to the left and forward of the shift lever looking down through the shift lever hole from the driver's seat with the shift boots removed. I can see that the return plug itself is actually there. I remember reading another thread that indicates there are at least two different 5 speed transmissions th…
Last reply by esprist, -
- 14 replies
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Ok, here's the deal. I got 72 240Z with emission recirculation and i was wondering is it worth effort to take it off? We dont have emission limits to 30+ cars. Does it give any Hp or make engine rev better? Also i would apreciate pictures and instructions about this.:stupid: Thanks already!
Last reply by zhead240,
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