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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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Identifing engine type

February 10, 2004 by TTDRIVER
4 replies

1.2k views
Today I went to look at a 1970 L24 and was unable to identify what type of head it had. The only thing that I noticed was a stamp on the block saying E31. Does that mean that the head is also a E31 or ....... Can some one help

Last reply by frank13, February 12, 2004
rotary engine 1 2 3

January 29, 2004 by Fun_in_my_z
33 replies

5.1k views
hey i got a crazy idea. i know this guy with a 73 240 out in the weeds. it was hit be lighting and burned. he says it was a special order car its got a rotary engin. needs rebuild.dont no size specks or anythang about the motor.i was thinking on getting it and stuffing it in my 71 does anyone have any knowledge of these engins.like what kinda power do they make how reliable are they that kinda stuff. just givce you 2 cents Bill

Last reply by zed240au, February 12, 2004
Whats that pipe?

February 11, 2004 by TTDRIVER
10 replies

1.7k views
Im trying to indentify the pipe that sticks out of the block located under the exhaust manifold next to the distributor. It looks like its about six or seven inches in length and has another small pipe coming out of it. The reason why I am asking is because the smaller pipe comming out of it is loose and has play. Should I JB weld it or does the complete pipe come out for me to change? Thanks to all the pro's who can help.

Last reply by TTDRIVER, February 11, 2004
Lean, rich, or draw?

February 11, 2004 by yuppie69
2 replies

1.3k views
Hi, my 83 280ZXT has been stumbling on hot restarts, whenever I let it sit for ten minutes or so. My mechanic saw it happening..stumbling, intake popping for air, poor idle stability, but he told me it is a "running too lean" problem, and suggested I buy a cylinder head temp sensor, an air temp sensor, a new AFM and god knows what else! I was surprised when I heard him tell me that "there are no simple adjustments on a fuel injected car for rich/lean". Is that so? Is there anything I can do with a screwdriver short of throwing it at him to compensate for this lean restart stumbling? The fuel pressure's ok, there is one slightly leaky injector I'll have to replace,…

Last reply by Chino 240Z, February 11, 2004
280zx oil light

February 10, 2004 by drunkenmaster
4 replies

1.3k views
The oil light next to the oil temperature needle has started to intermittanlty come on in my 280zx. I doubt it is oil getting too hot as it is usually on when the car is first started cold, then disapears and comes on in various situations while driving. I am wondering if this light refers to oil pressure not temperature which is featured on the lower half of the same guage?

Last reply by 2ManyZs, February 10, 2004
Valve & Port Sizes

February 9, 2004 by Gav240z
2 replies

1.2k views
This is just a general question about our engines and possibly applies across the board. I am wondering though why the intake valves and ports are so much smaller than the exhaust ones? It seems to me that whatever goes in must come out so why does so much more air come out than in? Is this the case? I was just looking at some of the new uploaded pics and it's always puzzled me that to make power in an engine it's the quicker you get it in and out that makes most of the difference. Can anyone explain this to me?:cheeky:

Last reply by Dale B., February 9, 2004
Fuel pump necessary?

February 8, 2004 by 2Forty
5 replies

1.5k views
The 73 I just bought has wiring for an electric fuel pump but it is missing. Car seems to run fine without it. That may change when summer gets here. Should I install one? Also, the interior reeks of gas. I replaced the taillight gaskets (taillight mounting flanges warped). Hatch gaskets aren't bad. Someone replaced one of the vent lines that needs to be sealed. Anything else? I guess my daily driver idea is almost out the window. Car needs a lot of "little" things.

Last reply by beandip, February 9, 2004
engins

February 8, 2004 by Fun_in_my_z
9 replies

1.7k views
hey i have a 71. the engine was out when i got it but it came with the car. but i donno what size it is . can someone clue me in how what is the difference? i know this is a dumb q for you guys im all full of em .

Last reply by halz, February 9, 2004
Changing head gasket: Cleaning the mateing surfaces?

February 8, 2004 by Murph
5 replies

1.4k views
I've just pulled the head off my sisters 2L sigma to change the head gasket. Now what I am wondering is, what is the best way to clean up the surfaces in preparation for the new head gasket? Also, what's the best way stop any of the old head gasket gunk getting down into the bores while cleaning it? Thanks, Justin

Last reply by Murph, February 9, 2004
oil cooler

February 7, 2004 by z_boi
4 replies

1.4k views
My motor runs hot, and i would like to be able to drive long distance without having to worry about overheating. I've 160 degree thermalstat but it still gets way over those temps after having driven for a while, or jus idling for a while after driving. I've installed a pusher electric fan but have yet to drive my car. I was wondering if there were any to install an oil cooler or if there were any aftermarket oil coolers out there i can use.

Last reply by z_boi, February 8, 2004
Starter

February 6, 2004 by 78 280zcar
2 replies

1.2k views
I am having a problem with my starter it wont disengage after it starts is this the starter itself or the starter solenoid. Thanks

Last reply by 78 280zcar, February 6, 2004
5spd better or 4spd

January 22, 2004 by TTDRIVER
11 replies

1.9k views
Which is better for performance and any disadvantages going from 4 to 5 spd? This question is for a stock 240z

Last reply by sblake01, February 6, 2004