Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
5,574 topics in this forum
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- 9 replies
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I have a 73 240z with flat top carbs. It feels as if the car is only running on 5 cylinders. It idles really rough. I took the spark plugs out today and the plugs in cylinders 1-4 looked normal, but in 5 and 6 they were really black. Is it running rich? The manual says to turn the idle mixture screw counter clockwise to increase the mixture. Is that correct? Also I have replaced all spark plug wires, and sparkplugs, should I check the distributor cap?
Last reply by sblake01, -
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Hey guys, I have a 75 280z EFI fuel injected. I bought a 60mm Throttle body a while back and had some trouble fitting it to the stock linkage and being able to adjust it and all but, my question is if anyone knows how you could bore out the intake so the larger intake can be more useful. Instead of forcing more air from a larger opening into a smaller hole, have the smaller opening be bored out to meet the larger opening as well. Does anyone know how to do this by your self or is it reasonable to take it somewhere to get it done, or is it even possable? Thanks for your input guys! Dean
Last reply by sblake01, -
Fitting cam towers 1 2
by Inf- 12 replies
- 3.7k views
I bought a rebuilt e88 with new guides, steel seats and everything. It has no cam, cam towers, no rockers fit to it so I was planning on moving those parts from another e88 (taking care to remember what rocker came from where). I was reading up and all the manuals I have recommended marking the cam tower position since they have to be fit in an exact position, but I don't really have access to the kind of tools they were recommending if these marks are not there:stupid:. I may just take both heads to a shop and ask them to do it. How much do you think that should cost to do so I don't get ripped off? Or is there any way for me to do this on my own? Andrew
Last reply by 240Zdragon72, -
- 7 replies
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Hi, I have an annoying problem. Whenever I come to a really hard stop, the engine idle drops to about 400 rpm for 4 or 5 seconds and then bounces up to normal idling speed (650-700). While it is doing this it idles like the mixture is rich. I have the stock 71 SU's, floats are perfectly adjusted to the high side of spec (14mm clearence instead of 15). Brake booster seems to be functioning properly. Anybody have any ideas? I have had the problem for a couple of years, but can't relate it back to anything I've changed. Seems like it has to be fuel related. I unhooked the fuel chamber vent lines to air filter, but no change. Is it just the fuel sloshing to the front …
Last reply by alternativez, -
I was doing some reading the other day and was reading about different heads. I saw that the most of the 240z's used E88s and the early ones used the rare E31. Well, I got a bunch of heads when I recently bought my second 240, and I thought I should check out some in my garage. What do ya know! One is an E31! Is this head worth replacing the E88 on a stock 240z? Ps: How do I know if I need a cam oiler?
Last reply by Gav240z, -
- 5 replies
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I have a late 73 240z, and the engine sometimes surges. It is majorly underpowered, and seems like its only running on about half the cylinders. We replaced the fuel pump, had the points checked, replaced the air filter, and replaced the spark plugs and spark plug wires. The engine ran great for about 2 months. It started surging, so we checked and readjusted the valves (cold), and it ran perfect for about 2 weeks. I didn't run the engine over the weekend, and now have the same problem happening, the engine surges, and most of the time is severly underpowered. I have balanced the carbs. Should i try to readjust the valves hot? What should I do?
Last reply by beandip, -
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I have 78 280Z 2+2 and am looking to do an engine swap. Will the L28ET bolt right up the existing stock car? If not what kind of mod will have to look forward to? Also what else must be replaced if I decided to throw a LS1 small block in? Any help is appreciated. Thank.
Last reply by sblake01, -
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I had a squeak in my idler pulley on my 280. It got progressivley worse, and I purchased another pulley from Z barn. The fellow there said he was familiar with the problem and sold me a puley that he had instaled new bearings in. I put the pulley on a couple weeks back, much quieter. Now that pulley is starting to squeak as well! But it is intermittent. I thought it might be related to temperature, but it seems to just be loud some days and not so loud on others. Any ideas?
Last reply by seerex, -
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I am replacing the head on my 240z. The current engine is an 1983 L28. The old n47 head is currently off the car and the N42 is ready to go. I was going to order gaskets from MSA but the gasket on the car is a Felpro. What head gasket should I use with the N42. Will the compression be different? I also heard gaskets with metal are bad, is this true? Thanks Ps, While the head is off, do I need a cam oiler with a robello cam? It was on the N47 with a crane cam.
Last reply by Bambikiller240, -
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Has anyone tried this? It sounds like a great way to clean the thing out. Any info would be appreciated.
Last reply by PrOxLaMuS©, -
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I want to install an Air/Fuel ratio meter but am looking for suggestions on the best method to install the sending unit. Cheers, LWW
Last reply by hls30.com, -
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They have a sale going on now on their Aerospace Thermal coating for headers, does anyone know if this is jet-hot or if not who does this for them? Also anyone have any feedback if they bought a header with this coating? Thanks Jeff
Last reply by byunique,
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