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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- 13 replies
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i have an L16 that has a dead cylinder. my neighbor's boyfriend said he could get a hold of another head that has been ported and polished. what other things need to be done if this head is different from what I have? I'm going to have the engine yanked because there's an oil leak, and a buddy of mine may be able to do the rebuild for me. the engine's gonna have to last me a while...
Last reply by Mr Camouflage, -
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HI ther ya'll! What's the word? I just got another engine for my car. I was thinking of rebuilding it. It's an l24. I was thinking about putting in an l26 rotating assembly with an e31 head. Is this possible? Will the valves on the e31 hit the pistons? Has anyone ever tried this? I wonder what the compression ratio will be. I would figure try to figure it out, but i can't find the cc's of each head. Any ways, let me know what ya'll think.
Last reply by Gav240z, -
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True or False: ALL P90a heads have hydraulic lifters. steve
Last reply by Gav240z, -
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Most of the magazine articles on the 240z and 260z list the stock BHP as 151 and 137 respectively but my 74 260z I.D plate list's 162 bhp and so do a few aust 1974\75 motoring magazines. what hapenned down under, what about N.Z and the U.K what did you get over there. Cheers Roger Adelaide STH OZ
Last reply by Victor Laury, -
- 3 replies
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Ok at the end of summer just befroei put my baby aways, there was an exaust leak right at the engine. put your hand there and u can feel the blow comming out. So I called somewhere and they said "there is no gasket" that goes between the head where the exxaust comes out and where the manifold meets the head. Well some one on here told me that there is a gasket. So when i get one, should i be going from underneath the car to take the manifold off? I am pretty clueless on how to adjust the carbs so don't want to mess with those much, maye i'll learn how to do that stuff this summer. Anyways how to i go about gettign at the exaust area? jack it up and go. or do i have to re…
Last reply by Bambikiller240, -
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I went ahead and took my car out for a drive today. Well it was fun for a little bit, at least until I opened my hood. I recently posted and was told that my head gasket was bad or my head was warped, due to a brownish slug in the coolant lines (being oil and coolant being emulsified, and that I should try to flush my system. I went ahead and tried. I let the water go through the system after the thermostat and had no luck. I cannot get any water to run through my manifold, no matter which side I run water in at. Does anybody know a way to unplug the coolant system. Or should I skip this step and start to look for a new motor. Let me know Frankenstein Z
Last reply by Daniel, -
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I have been looking around for a motor to rebuild for my 240. After all the looking around I have found a 78 280 motor for $400. Is this what i should expect to pay?
Last reply by ZmeFly, -
Valve polishing? 1 2
by kmack- 12 replies
- 20.4k views
I'm getting started tearing down my original motor for my 240Z. L24 w/E31 head. I'm going to refresh it and possibly do a little porting on the head (maybe). My plan is to run SU's, stock cam, 6-2 headers, Crane XR700 ignition. My question then: Is there any benefit to polishing the valves (intake and exhaust)? In theory I should get better flow across the valve along with lessening the possibility of carbon being deposited (hard to stick to a smooth surface). But is there any real measurable increase in performance? Should I even bother?
Last reply by beandip, -
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Hi there ya'll! I got some news. My engine is broke. It makes a kewl new sound. It's kinda like "clink clink clink clink" in very rapid succession. I kinda like it. NOT! I was on my way to work, when I had a los in power. I pushed the clutch in, and the engine stoped. I turned my radio down, and heard that kewl new sound when i restarted. I immediatly turned it off. Un fortunately, I was forced to drive it off the free way to a place that would be safe to stick my z in the back of a trailer. It's now partially dismantled in my garage. I hope i didn't damage it too bad. I think i spun a bearing, becaue when i was pulled over on the freeway i checked t…
Last reply by Ed, -
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I have read many articles on modifications to increase horsepower for the 240Z. Nobody seems to offer a scale of suitable mods showing horsepower gained with the level of modifications done. I run my car in hillclimbs and sprint events but also like to use it on weekend runs. I apparently have an L24 motor with N42 head, SU type, round top carbs and 6 into 2 extractors with 2 and half inch straight through exhaust.( I have not opened the motor to check the internals yet) This engine revs to 6500 rpm before running out of breath. Torque seems to be in an even band from 2500rpm. The addition of an electric fuel pump has helped deliver fuel. Does any one know what the …
Last reply by spunkysandoval, -
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Anyone know how 'rare' P90 heads are in Australia and what I should pay for one if I find one? Also, anyone tried the Brian Little (Dr Z) engine mods? Are they sound in terms of engine life? I want to give my project car some grunt but from the point of view of my limited knowledge I want to keep things fairly basic.
Last reply by Ben, -
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I want to start fixing up my 240z and i thought it'd be a good idea to get fuel injection. How would i go about doing this cheaply?
Last reply by ZmeFly,
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Wilbur
