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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I have heard it said that the bright links of the timing chain will "line up with the timing marks ever now and then" when you spin the engine over. Well... I'm here to put a number on it and that number is eleven. I lined up my timing marks and then rotated the crank to see how long it would be until the marks lined up again, and the answer is that they line up every eleven rotations of the cam (twenty-two rotations of the crank). Not being satisfied with only experimental results, I counted teeth and links and stuff. There are 20 teeth on the crank gear. There are 40 teeth on the cam gear (makes sense since the cam spins at half the crank speed). Ther…
Last reply by Adnan, -
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- 2 followers
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- 494 views
does anybody know what you call the plug on this...it looks to be like a sensor or something?
Last reply by Yarb, -
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Hi Guys. Pulled my Valve cover today to adjust the valve lash and noticed that there is a lot of burnt oil on the value train. Is this normal? Or a sign of overheating? I have only had the car for about a year and a half. It’s had two oil changes in that time over about 400 miles of total driving distance so I don’t think it is due to my care, but no idea about the P.O. I haven’t seen it overheating in the time that I have had it. I do drive a mostly in the city which may have some impact. If it’s not a big deal, will just clean it up with some acetone and go about my adjustment. If you guys have any suggestions for things to check, let me know!
Last reply by Muzez, -
- 2 followers
- 6 replies
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Hey Guys, Mechanic has my FSM and Haynes manual for a transmission inspection. Hoping you can answer a curiosity question: What is this part called and what is it for?
Last reply by Muzez, -
- 1 follower
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Just wondering about some input on the valve cover gasket material. I am seeing cork/rubber and composite material listed with very little additional info. Which seems to work better on this long valve cover? Also wondering about the valve stem seals Are the VITON material seals the best choice or should we spend the extra money on the polyacrylic seals. Looking at the MAHLE brand for the seals. Thanks for all the help on this resurrection project. Just trying to line up all the parts needed for the cylinder head rebuild. Thanks, John-Lugoff, SC.
Last reply by heyitsrama, -
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- 25 replies
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I have to replace my head gasket and I'm not a mechanic. So does anyone have a video they recommend on how to do it, and who you recommend to get one from? 77 280z 2.8 NA Sent from my Pixel 2 XL using Tapatalk
Last reply by Dave WM, -
- 2 followers
- 8 replies
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Hi Guys, Going to look at a used differential this week to pair with a ZX transmission I just pulled. Was trying to think of things to check before buying. Check Diff stamp on ring gears Internal welds Metal on the drain plug Damage to spider or ring gears Play in the pinions that hold the spider gears. Damage to the pinion seal or bearings. What else am I missing? Thanks to @Zed Head for some initial inspiration here.
Last reply by Muzez, -
- 3 followers
- 9 replies
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Does anyone know of a source for the stock Nissan rubber/steel washers used to mount the differential mustache bar? I noticed that the ones on my '73 are starting to show some wear and want to replace them. MSA lists the washer/bushings as NLA and suggests going with polyurethane. I have the bushing which fits vertically inside the mustache bar and would like to keep this mount rubber. Any help would be appreciated, Thanks, John
Last reply by inline6, -
- 3 followers
- 14 replies
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Hi there, Three months ago, I purchased a 1974 260Z with L28 turbo block with 3.1 L stroker conversion with Carbs. I love the sound and responsiveness but can't drive for no more than 20 minutes due to the smell of gas. I want to retain the current block but maybe convert to fuel injection. Any advise regarding this conversion including itb would be highly appreciated. I would like to know what hardware and engine management is required and where I can source the parts. Ultimately I'd like to tune the vehicle via dyno. I love the look of the itb. Any advise for this Newbie?
Last reply by Racer X, -
- 5 replies
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I have turned into the Datsun tutor for a young lad(17”) Alex that has bought a 81zx project. The motor was half apart and the guy he bought it from was not the wrench on this car , just an owner . Anyways , the block and head were together in the car , but no induction or exhaust - that was all laying in the car . Dirty valve train like the valve cover was off for a long time . It’s been sitting for years . Took the head off to inspect and clean . Mating surface was flat . Cam is a CWC core and seems to be a stock replacement . Engine did turn over fine . He brought me the head and I broke it down to be cleaned and to do anything else necessary for him to have a runne…
Last reply by madkaw, -
- 2 followers
- 6 replies
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Hi, I’ve been slowly working on restoring a 77 280, it has the 5 speed with a hole in the bell housing, I found an early 4 speed from a 70-71 for a decent price locally. I was hoping someone more knowledgeable than me can tell me if the 4 speed bell housing would fit the 5 speed before I spend the money. Thanks!
Last reply by Racer X, -
Tranny leaks 1 2
by 73avocado- 4 followers
- 16 replies
- 3.3k views
I’ve got a new (to me) 73 Z, and I’ve got leaks from the 3 devices mounted to the transmission. They all leak down the outside of the housing. I’ve found a drawing that calls them the speedo drive, reverse lamp switch, and the clutch slave cylinder. I’ve only been able to find a part number for the o-ring for the speedo, and not much info on how to get at them. Does anyone have the part numbers for the 3 o-rings or seals? Anybody done these before? I’m really hoping to change them without dropping the tranny. Thanks!
Last reply by 73avocado,
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