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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- 13 replies
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So, my basically stock '78 has developed an annoying habit. The overflow tank lid keeps popping off, and I have to keep adding coolant. Now,I cannot identify any external leaks, but have not given it a lot of attention. Not running hot, no steam or odors from the exhaust, and the oil looks normal, meaning no milkshake. Car runs fine, with no issues other than this. I did just put on a new radiator cap, as the old one was leaking for sure. Even after this, these symptoms persist. Looks like I may have a gasket in my future, what you guys think?
Last reply by ZCurves, -
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My dad and I have 4 Datsuns b/t the two of us. We have built 3 engines over the past 3 months and have had the hardest time ever finding exterior engine bolts, washers, nuts etc. I am not referring to the silver Zinc either. There are plenty of those at Ace Hardware. I am referring to the grade 10.9 yellow zinc/cad plating. Reddat wants $100 for the whole L series set of bolts in the original finish which doesn't even include oil pan bolts. Those are still available from Nissan. His shipping costs are absolutely outrageous and not stated in the auction description. I believe I have found a source for all these with a very large minimum order. If so, I will be selling en…
Last reply by Phred, -
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Anybody have a spare shifter for a 280Z 5-speed? They appear to be unobtainium. I’ve checked with several Z used parts sites, the CZCC classifieds, Craig’s list and ebay. The MSA short shift kit is on 3 month back-order. Thanks!
Last reply by Darrel, -
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Okay so here is my idea but not sure if its worth it.I recently bought a n42 head had it port and polished rebuilt.Next im using a n42 block and i wanted to have it bored over to 3.0,Have a friend that works for nissan so he said he can get me 6 ka24de pistons for 150 so im happy there.Running su's on my l28 its a 240z so using those. Am using the l24 rods from my 240z. Now my question is me boring over to 3.0 is it gonna make that much of a difference or should i just forget the boring over and live with my head work any ideas.Im a student so i cant really spend to much.I have all these parts already so please ideas would help thanks.
Last reply by blitz_86, -
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i have a 1973 240z that i bought and now the transmission (5th gear) is not working... not a big problem.. i know that this transmission is not the factory one bc its not a 4 speed... when i dropped the trans it had 280zx sport written on the outside with a marker... so here is my main question.. how do i know what rebuild kit to buy for it? i understand that there are two different types besides the borg warner and i know that its not that... the only thing i can find is #5-10-31 that was put on there when it was made... any ideas guys? 0
Last reply by Travel'n Man, -
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Why do we HAVE to cut the floor to mount the fuel cell? Can it just sit inside the trunk with mounting straps? I never plan to take my car to the track, just weekend street driving. someone took all the vent lines and such off my my stock gas tank and I just have this (perhaps wrong) thought that it would be cleaner/better to get one of the summit racing fuel cells and mount it inside the trunk. is there some general knowledge i dont have? or did I miss a memo on why everyone cuts their floor? I searched google and the Grand National guys just mount the fuel cell in their trunk, no cutting. Looks like this:
Last reply by revlis240, -
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Hey! I am about to rebuild the engine in my 240 but I have come across something interesting. I want to use Nissan parts and noticed that the part numbers are different depending who I ask but they all claim that the arms are all the same. So does the 510, 610, 240, 260, 280 and other motors use the same rockers? Thanks! Polecat
Last reply by Carl Beck, -
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I built a stroker engine for my '71 Z. Hatch Engines built the bottom and and I put the head together. The valves were also done at a machine shop. It ran perfectly for two years. Engine has 1500 miles on it. I show it occasionally and rarely drive it. I started it a while back to get some fuel in it. I looked in the mirror and saw a lot of smoke coming from the tail pipe. I drove it home and it stopped smoking after driving it for 15 minutes. Today I took the car in for some electrical work. Same think happened. Smoked badly at first and then stopped smoking after I drove it across town. The engine runs well and is responsive. Where is this oil coming from? I wonder if i…
Last reply by Travel'n Man, -
I have a two part question for our resident engine builders. Use the bore/stroke of an L28 for comparison. First, is the power/torque gain for a fun-to-drive street/autocross powerplant with a full 3.0L stroker kit using 10:1 pistons worth the added expense compared to just using new 10:1 pistons and sticking with the L28 rods and crank? Second, I've read that stroker V8 engines like more aggressive cams and tend to "soak up" the lumps & idle smoothly. Does this apply to our L engines as well? I suppose a way to objectify the question is, would a stroker L30 prefer a cam that's a step or two up from a mildly more aggressive cam made to hop up a stock-block L28? Th…
Last reply by LeonV, -
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OK guys, I tried the search function, but did not find a definitive answer. Will the shifter from my 1972, 240Z 4-speed work in a 1977 280Z 5-speed? From what I read it sounds like it will fit. I was planning to use a MSA short-shift kit, but found out today that they are back-ordered for 3+ months. If my 4-speed shifter won't fit, I may have to design & fabricate a custom part, but I really don't want to do that.
Last reply by sblake01, -
just checked my 240's compression and found: 115 75 75 50 50 115 the first three plugs were black and sooty...the other three were almost new looking...becasue they are...(maybe an hour on the new plugs) what are options? Leakdown test first? buy another motor? rebuild mine? Sea Foam? check valves/adjust? timing chain? thanks
Last reply by Diseazd, -
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I've seen this topic come up several times but never found a good description of how to tell. I realized today that I've seen one distinct difference between an early 280Z four speed and a 280z five speed. So I took a couple of pictures for the record. One is a 1976 four speed, the other a 1978 five speed. The difference is in the straightness of the housing across the bottom of the speedometer drive gear mounting area. The five speed is essentially straight while the four speed diverges at the housing. The old timers probably know how to tell at a glance, but I have not been able to find a good writeup of how to tell them apart visually. Both are mounted. The 76 …
Last reply by Zed Head,
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