Engine & Drivetrain
Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.
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I’m nearing the end of my veeery long rebuild project on my L24 and I finally bolted on my original F4W71A. I’m using the original throw out collar and fork, but installed this new clutch kit from zcarsource: link. When pressing on the slave cylinder side of the fork, I was just expecting to feel a nice gradual resistance as the TO bearing engaged the pressure plate. Unfortunately I feel absolutely nothing until almost the end of travel. I can’t imagine that small amount of travel is going to be able to get enough leverage to actually disengage the clutch. Any ideas what I could have done wrong? Here’s a video of me fiddling with the fork to show what I m…
Last reply by Patcon, -
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My 1972 (11/71) 240Z is in the garage for engine work. The shifter has been in the neutral position all that time. Now that it's ready to be test driven we find that the shifter is hung up and will not engage first or second gear but only third and fourth. On an important side note, the car was two miles inland during hurricane Ian and flood water came up about 18 inches on the sides of the car. Don't know whether water may have found a way in. Thoughts please.
Last reply by Yarb, -
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Hey there! I have been getting some great tips from you guys. I own a 1971 240z. Original l24 with a 5 speed installed by prior owner. The other day, I was replacing leaking master and slave clutch cylinders and I noticed the following stamped on one side of the transmission housing: L5 "NMCA" and "#3" on the other side. Does anyone know what kind of 5 speed this is and gear ratios? Any help would be greatly appreciated. Thanks!
Last reply by dutchzcarguy, -
- 2 followers
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Looking for an early 4 speed transmission cross member for my May 70 03802 240Z. I have a 1972 cross member but it's the wrong one for the early 240Z I have. Happy to swap my 1972 mount for an early one if anyone is interested. Thanks, Roo
Last reply by SpeedRoo, -
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I believe there is only a few minutes running time on an engine I'm tearing down at the moment. This is the #1 cylinder and is the worst one, there is a minor amount on a couple of others. Also, the rod bearing shells.
Last reply by grannyknot, -
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I have an FS5W71B of unknown history that goes into second and third just fine except for a frequent grind. I understand it’s a fairly common problem and I’m pretty certain it not a clutch release issue because I don’t have a problem getting it into reverse. May need new synchros, but I read in a really old post on another forum that putting stronger spread springs behind the shifting inserts helped avoid that problem. The idea was that it pushed the synchros into the cones with more force. Any experience with that? Dennis
Last reply by swflaz, -
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My car doesn't have a hose for the wintertime connection from cleaner to manifold. I don't really need it in Sacramento, but do I want to put it on there anyway? I don't think I ever see one on most if not all of the cars that get a proper restoration on BAT, but it just feels weird to have that exhaust manifold going nowhere? A quick search here really didn't provide much other than a small thread from 05. If I do need it, is it really this from Z Car Depot as the original looking hose?
Last reply by siteunseen, -
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Hey guys, I have an L28 Engine, N42 block and N47 head. My goal was to rebuild the engine and make it a reliable engine that can last a long time. I want to avoid having to pull the engine anytime soon. Power is not my biggest concern however I would like to be above the stock power numbers minimum with this rebuild since it's going to gain a little weight with aftermarket AC. For the most part I will be sticking to the stock efi for smog reasons and would like whatever I do internally to not mess with my ability to pass smog. I have almost all refurbished or new parts for the intake manifold too which should be a big help. The condition of the block is the cylinder …
Last reply by Ownallday, -
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- 17 replies
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On one the first starts on my 73 restoration project, I notice I didn't have any oil pressure showing on the gauge. I was pretty sure I had oil pressure because the engine wasn't making a lot of noise but shut it down just to be on the safe side. Using the forum, I was able to find out how to check to determine whether it was the gauge or the sending unit. Turns out it was the sending unit. I ordered a new one from Zcar Depot. I installed it and that took care of the issue. I started noticing a small oil leak under the car. I had a hard time locating the source but finally discovered it was coming from the oil pressure sending unit. It appeared dry around threads, bu…
Last reply by EuroDat, -
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Doing a rebuild on a 05/1970 L24 engine and looking for advice on pistons. Need flat top +0.20 or +0.30 83mm pistons, anyone bought any recently and know what is still available? Usual suppliers all out of stock.
Last reply by Yarb, -
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I just changed my oil and filter for the first time (71 240z) and was wondering if my pressure readings seem accurate to folks. 10w30 at idle (9000 - 9500) with the engine temp at midpoint gets me about 1/4 reading on the dial. If I give it some throttle to keep it steady at 2K it climbs to 1/2 gauge and hold steady. Does this sound right? It seems the PO put on a new sending unit but it's the gold one which after some digging here it seems some people don't speak highly of. Also I did some reading on dipstick type and accuracy and it seems my e3001 has just slightly shorter dimensions from shoulder to tip than most folks report. My reading is about 3/16th over …
Last reply by Racer X, -
- 2 followers
- 15 replies
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Friend had an exciting day yesterday. 75 280 with the early Z (78-80ish) 5speed (the one with no reverse lockout). Pulled away from a stop light in 1st, got about 10 ft, and BANG!!!!!!! And the car stopped dead. Needed a tow home. He drives the car 50,000 km a year, drives it daily. Has a modified L28 “maybe” 200hp. Not a sense of anything going wrong, just WHAM. I rebuilt this trans over a year ago with the usual bearing and sychro refresh. He pulled it last night, brought it over this morning, we tear it down. Found something I’ve never seen before.
Last reply by Captain Obvious,
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