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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- 1 reply
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Where can I find these in Australia or where can I order them from o/seas for my '72 240Z? The guy that's doing my engine reco has found everything bar the rockers. With a higher duration cam, are the rockers different? ie should I first set my mind on a cam and then buy the appropriate rockers or what? :stupid: Another option he told me was to swap the head with that of a 260/280? Is this the better option considering I want more perfomance out of the car? I'm planning to use 27/70 cams or should I go with the slightly milder 25/65? I don't want to loose out on too much bottom end power. What other options do I have with heads and/or cams? Sorry about all the questions…
Last reply by Ben, -
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- 2 replies
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The previous owner of my 71 Z put a four speed transmission back into it and i assumed it was from an early z car. Then i noticed the other day that someone wrote "77 280Z" on the transmission. i'm not sure of the name of the part is that it was written on it, but i could see it from looking down into the engine bay standing on the driver's side. So my questions are, how can i tell where the transmission came from? Did 280's come in 4 speed? perhaps i wasn't even looking at the transmission in the first place! i don't know much about cars, but i love learning about them. Thanks, Ty
Last reply by tttz, -
Exhaust FYI
by Zsled- 5 replies
- 1.4k views
So today I completed the install of a new exhaust system on my 72' 240z. It has the stock L24 with no mods. I swapped a motorsport auto header out of my 75' 280 into this car. It is the 6 to 1 style header. So here it goes... I have a header, out to a 2.25 inch pipe with about 10 inches to a Glass pack (Bullet Muffler). From this muffler it does 2 bends to a Turbo Tip! This is actually a twin tip that has been filled with glass. This whole set up from the header to the tip cost me $80 USD. The header and Tip I had, So the collector and the bullet muffler with the tubing made up the rest of the $$$. I am writing this to let you know that I have almost no loud res. in the…
Last reply by ZmeFly, -
- 3 replies
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I have had this problem since i bought my 73, 240z. When I have the engine running i can see tiny bubbles coming out of the base of my clear stock fuel filter. Under a load, the fuel level will fall below the filter 'sump' and the pump will suck air. I have replaced all of the rubber lines, filters, fuel pump, and checked the lines for damage. Still not resolved! The only way I keep my car from dying going up hills or when under load for long periods, is a temparery electric pump. What could be causing this?
Last reply by Sonic, -
- 7 replies
- 1.9k views
Driving along taking my son to Kindergarten I turned into a quiet street and caught a glimpse of a 240 roof line over a small fence. You know how sometimes you look around when your driving and something catches your eye...this is one of those times. This happened a week ago and I and after a 240 now I'm back in NZ and I went back for a real look today. Someone was at home so I walk in and chat to him. It is a 1977 240 body with a L20 injected motor with AC and 5 speed. Alan....do you know if this was a factory setup in 77 of is this a back yard beast? FairladyZ badges on rear and side of front guards ONLY. In red with iron cross wheels. It is in very bad rust mode with c…
Last reply by Ivan, -
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Does anyone know what the maximum compression a L28 .040 over, cast, flat top piston can handle before it implodes. Running on roughly 105 octane.
Last reply by ctomkins, -
- 5 replies
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Hey guys I'm looking to adjust the valve clearances in my 240z. I've done this before and it's not hard but this car has had a mild duration cam installed so I am wondering if this will mean a new set of specs for how far it should be adjusted. The lobes of course are gonna be sharper but should this affect how much clearance? I hope this post is making sense. Anyway I would also like to know how you'd know if your car is running too lean and what happens when you burn your valves? Apart from a loss in power would you have to reco the valves to correct this problem? I have a gut feeling the car is running a bit lean any help appreciated guys.
Last reply by Rick, -
Water leaking into engine
by Guest AZ 73 240Z- 5 replies
- 993 views
We are new to the forum as well as Z cars (though we've had Roadsters for several years.) We recently purchased a '73 project that blows white smoke through the tailpipe. Len was able to drive the Z home from the seller's house, and after a few minutes driving the smoke cleared out. It is our understanding that this is indicative of water in the cylinders, so we will be pulling off the head & replacing the head gasket. It's been recommended that we also have the head checked for cracks. Our biggest concern is a crack in the engine block. Is there way to diagnose this at home? Thanks! Charlotte & Len
Last reply by 2ManyZs, -
- 10 replies
- 2k views
I started polishing my rocker cover yesterday, i have only done a small section and the results are pretty amazing. All I have done is used a high quality chrome/aluminium polish ( I got this from a bike store and the Harley Davidson riders recommended it!). It has taken a lot of buffing and reapplying but the look is very impressive. I hear some people use different grades of wet paper and then polish it but I am too worried about scratching the rocker. I may use a dremmel with a polishing attachment as it does take forever. Has anyone got any tips of how they did theirs??? Do you think i should remove the rocker cover??? This would be the easiest way to go but I had…
Last reply by carguyinok, -
- 4 replies
- 2.4k views
i have a 72 auto w/l28 motor & n42 head the cam does,nt cut in till 3000rpm.I have orignal standard l24 motor with stock cam in good condition. will i get better acceleration with l24 stock cam if i swap it over. I am not interested in 125 mph top speed, but better lower end performance....Thanks... Jimbo....
Last reply by sjcurtis, -
- 4 replies
- 1.5k views
the weather stripping in my 1970 240 desperately needs to be replaced (mainly the inner rear hatch) but motorsport wants to charge me 82 bucks for it. my questions are, is there a cheaper place I could find it? and would the cheap stuff from JC Whittney do the job right? thanks, nick
Last reply by zmanofwashingto, -
- 5 replies
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Hi there..well winter is here so i figure it's the perfect time to save up my money and get everything i need to fix things on th Z. At teh end of summer i noticed that where the exaust manifold connects to the head that it has a leak on the end nearest the windshield. So i called to see about a gasket that goes between there...they said they didnt have one. So does this mean that it's metal to metal? And what do i do to fix this problem? if i put my hand by there u can feel alot of air coming out near the engine. Doesn't sound good either. And exaust gets into the car when windows are down...thanks peoples again...Since i'm gonna assume that i need a new exaust since the…
Last reply by New_BE,
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