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 have a question on the blow-by or crankcase fumes coming out of the top of the valve cover on my car. I noticed that the car doesn't burn any oil or smoke at all when the hose is disconnected from the air intake. The amount of 'steam' coming out of the valve cover starts out as almost none at all, to lightly and steadily rising out like a kettle with the lid open coming close to boil. It comes out steady and not in puffs with each stroke. It also steams out the oil disptick tube if you pull the dipstick. When connecting the hose to the air intake, the car noticably idles rougher, and the exhaust gets a little stinky and it smokes a little on throttle. Smells like o…
Last reply by ajmcforester, -
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I was removing the spark plugs for a compression test and here is what I found: Carbon/dry, sooty deposits on all 6 plugs = too much gas/problem with the injectors...? Plugs no.2 and no.5 were oil fouled = worn piston rings or worn/improperly seated valve guides. Are my diagnosis above correct? Am at least headed in the right direction? If so, what do I need to do all of those jobs; replace the vlave guides and piston rings, and, clean or replace the fuel injectors? This would be my first time pulling the head...so I have a few questions: Is there a book/manual for doing a ring and valve job? What other things should be replaced, inspected, etc, while the head is off? .…
Last reply by JohnnyP, -
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Post deleted.
Last reply by JohnnyP, -
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For any of you that have 6 into 1 headers on your cars, do you know if it is possible to drop the tranny without taking the header off? I'd like to put in a 5 speed, but I want to do the exhaust first. However, if everything has to come back off, I might as well wait until I have all parts. Thanks. Todd
Last reply by tlorber, -
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Hey can i get some estimates of what you guys think it would cost to have a head work do, replace the a couple valves, valve job, etc. thanks frankie
Last reply by Frankensteinz2, -
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I am still troubleshooting my fuel system. History in the following post... http://www.classiczcars.com/forums/showthread.php?t=37722 I have a clean tank, new filters and I blew down the fuel lines. The car runs great 95% of the time but now and again it tries to die when idling. I pulled the return line (after the restriction orifice) and ran it into a gas can. I get lots of fuel flow from the return line but it spits and pops like I would expect it to look if the gas was boiling in the line. I'm running out of things to test but I thought I would try to take the mechanical pump out of the equation in case a blockage in the pump is causing an intermittent problem. …
Last reply by steve91tt, -
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I was going to adjust the valves on my 70 240 I bought last year. As a matter of course I checked the compression at the same time. The first 5 cylinders were 185 to 187 psi at a warm to touch engine. Number 6 was 160+ and the plug was white. Number 6 is obviously running too hot. No oil in the water or water in the oil. I did a variation of a leak down test and air came out number 4 plug hole. It doesn't appear to be a head gasket (or at least the typical failure), but I am not sure what it is. The valves did not seem really screwed up. Anyone have any ideas? I would really appreciate it.
Last reply by Z-Luke, -
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I have a L28 from a 83 280ZX for my 240Z. I have triple 45 from Top End Performance with TWM airbox and 3-2 headers in 2" with 3" exhaust in stainless steel. The head is N42 and will be ported to fit in/ out. I am not a " motorhead " and I have read a lot about this but will also try to ask for some advice. My goal with this engine is good power also with low rpm - and the questione is what type of camshaft and spec should I go for. I feel that I am lost in a "technical" jungel with this cam issue:stupid: This car will only be a street car. Thank you for your time rab
Last reply by ra240z, -
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Hi guys, I recently tried to move my 260 that had been sitting for quite some time in the garage. Turns out I have no clutch pressure and the car won't budge. The master isn't leaking so I'm thinking that the diaphragm in the slave has gone. The real question I have is why the rear wheels won't budge. I jacked up the car and beat on the drums for a bit, thinking maybe the shoes had stuck themselves to the drum. That didn't fix anything. I also thought that maybe the wheel cylinder had gone on one side as I had to replace one side quite a while ago and didn't opt to replace both at the same time. I've heard this will sometimes cause the opposing side to go on older …
Last reply by Zs-ondabrain, -
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I just finished setting valve lash on my car's L28 today. I followed the FSM spec, 0.007 intake and 0.010 exhaust, set with engine cold. Took me several re-checks to finally get all 12 valves to be happy, I'd set them and rotate the cam back around (using the crank bolt) to recheck and a couple would be loose or tight so I'd have to set them again. Here are some questions I came up with. 1) almost all of the 17mm set nuts felt ridiculously overtightened when I first broke them loose, took my whole body weight and in a couple cases I even had to use a cheater pipe on the wrench. The other engines I've set valve lash on all used the same "one hand tight" spec on the set…
Last reply by dclamm, -
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I am trying to get a better feel in my shifter. I have pulled my center console to try to clean it up and maybe put some paint on it and refresh the chrome strip with a sharpie as has been documented. What I was wondering is if there is a harder rubber alternative to the stock rubber shifter bushings? I would like to make the shifter feel a bit more solid. I have looked at some of the usual Z parts places and with no luck. Does anybody make a kit for this? Thanks
Last reply by Zedyone_kenobi, -
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just installed new flywheel,clutch,pressure plate, release bearing, When i let up the cluch im getting a bouncing and tremble in the car,like it viberates instead of a smooth shift, anybody know why this is happening?
Last reply by iscopa,
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