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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To address the wet plugs issue and to enjoy the car a little more. Mainly occassional driving and few autocrosses. I’m not well versed on the technicals. Work will be performed by a skilled friend. Plan is to overbore, use larger pistons, steel 280 valves, regrind a 280 camshaft into a stage II profile, rejet the Weber 40s to 42. I could use your suggestions. Baseline is my 260z motor with Weber40’s, headers. Want to keep the budget as low as possible but since I’m already diving into a rebuild I might as well hope for about 100hp increase. Am I dreaming? I’m hoping to recreate the adrenaline pumping I get from my now gone aircooled 911. Thanks 12/70 2.6 block E88 hea…
Last reply by wil84911, -
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My car burns what I think is too much oil, about 1Q every 500 or so miles. I notice some smoke when starting up but quickly clears up. I do a LOT of short trips, low speed stuff, which I have read may cause issues for an engine that likes to rev like the L series. There are no external leaks and no internal (crank case oil looks good, no milky looking stuff at all, no oil film in rad). I did replace the PCV valve on the assumption that if it was clogged crankcase pressure could rise and cause problems. The compression looks good (160-165 on all with a cold engine) but I know that only means the compression rings are ok and could still be stuck or broken oil control rings.…
Last reply by Dave WM, -
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Delivered my 240Z head at the workshop this morning, before installing the new manifold and triples, I decided that it would be better to have it cleaned, and checked before it all went back together again... That made me thinking.... What about a mild cam instead of the standard? What would it take, besides the cam itself, rockers and lash pads? any thoughts, any one?
Last reply by fairladyz432, -
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I have a 2 inch pipe looking for a nice deep growl for exhaust. Any recommendations? Sent from my iPhone using Classic Zcar Club mobile
Last reply by joe newsom, -
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As the title says I have my L24 bored 1mm over and pistons. I also have rebuilt N42 with new valves. Anyone tried this combination with a N42 head? Any valve clearance problem found?
Last reply by madkaw, -
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Need all new valve guides and clips for my 240 head. Do the Nissan and the ITM version come with the retaining clips? Also, The parts manual shows different p/n for intake and exhaust. Some sellers say they are the same guide for both. Anyone purchased and installed any lately? Thanks.
Last reply by gundee, -
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Beginning the installation of a different head (E31) on my 72 stock engine. Are new head bolts a good idea? Non turbo or Turbo? Where would you buy them? Are new studs better than new bolts? Where to acquire the timing chain wedge? Other recommendations are a[appreciated Don.
Last reply by 240260280, -
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i can’t believe I’m asking this, but how do you remove the air cleaner housing on a ‘72 240Z?! The front wingnut is too long to fully extract - it hits the front strut mount area on the driver-side inner fender. Without extracting both Wingnuts, I can’t remove the housing. There’s gotta be something I’m not seeing. Can someone help a Z brother out?
Last reply by zKars, -
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In my daily perusal of CL I ran across an interesting photo in this posting. Photo 22 shows what looks like a crank trigger wheel on a very stock looking 1973 240Z with supposedly 66k miles on the clock. It does have an aftermarket coil, but the smog pump, carbs, and distributor are still in place on the pretty unmolested looking engine. Any ideas on what we are looking at or why a carb car with a distributor would need a crank trigger? My only guess is there's some kind of different ignition timing going on somewhere. I'm starting an L28E build with Megasquirt for my 240Z and am looking at crank trigger options. Thanks, K
Last reply by Zed Head, -
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I look at a 1971 240z with an Engine Block number L24 015581. The head has a E88 Casting (which should be E31 for 1st series) and the valve cover I don‘t know. What are your recommendations? I was not able to check yet, if the block was mtching nrs...
Last reply by jfa.series1, -
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Hi, What do I do with the metal cylinder that came with my new throttle linkage boot? Howard ’74 260z
Last reply by siteunseen, -
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I have a four speed manual transmission from my '73 240z. I noticed some heavy grime in the bell housing and wanted to replace the seals and gasket. My trouble is getting the front cover off. Is it supposed to come off once unbolted from the front? I have searched and didn't come up with anything other than removing the fork and tapping with a screwdriver and a mallet, but it is not budging. Thanks for any helpful insight.
Last reply by Thekvr,
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