I'm thinking I *may* tackle this before the winter, just for the hell of it.
I have done the timing chain kit in my 240sx, so I'm wondering what it is I got to do to repair my crankcase blowby (I think I remember seeing that piston rings or something have to be replaced).
If you were to compare the 2 jobs, are they alike, or is one much harder than the other?
Thanks for you help,
lbrowne
My crankcase has blowby, how hard to fix compared to doing timing chain?
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encasemyheart
- Posts: 634
- Joined: Wed Sep 25, 2002 1:29 pm
The engine is probably one of the hardest things you can do, short of disassembley of the transmission and all the gears inside.
I get a shop to do engine work because there are alot of things you can screw up and if they screw something up, I'm not the one disassembling the engine again to fix it. PLus they have more experience.
Usually you need a machine shop anyways to do some stuff like boring the cylinders and machining the head again etc...
I get a shop to do engine work because there are alot of things you can screw up and if they screw something up, I'm not the one disassembling the engine again to fix it. PLus they have more experience.
Usually you need a machine shop anyways to do some stuff like boring the cylinders and machining the head again etc...
Blow-by means the cylinders/rings have worn out of tolerance and combustion gas is escaping from the cylinder.
It's substantially harder to fix than a timing chain (which isn't the easiest repair in the world to begin with). Unless you have a very good set of micrometers, you will not be able to calculate how badly the bores are worn, and hence if a rebore is necessary. If you need to rebore the cylinders, that's a whole other can of worms and really should be left to a machine shop with the proper tools. This is not to disparage your abilities, it just takes specialized knowledge and equipment for this sort of thing. You can't really "guess" with precision parts like that.
You're better off giving the engine to a good machine shop that deals with import motors, and having them determine what needs to be done. This problem would be real difficult to solve on your own.
EDIT: sorry encasemyheart, you type faster than I do.
It's substantially harder to fix than a timing chain (which isn't the easiest repair in the world to begin with). Unless you have a very good set of micrometers, you will not be able to calculate how badly the bores are worn, and hence if a rebore is necessary. If you need to rebore the cylinders, that's a whole other can of worms and really should be left to a machine shop with the proper tools. This is not to disparage your abilities, it just takes specialized knowledge and equipment for this sort of thing. You can't really "guess" with precision parts like that.
You're better off giving the engine to a good machine shop that deals with import motors, and having them determine what needs to be done. This problem would be real difficult to solve on your own.
EDIT: sorry encasemyheart, you type faster than I do.
oh well. Guess I won't be doing it 
She only burns a tad bit of oil, in a trip of 450+ Kilometers, at a speed no slower than 130 kph, she was still in operating range and I had to add just a small amount.
I only get a bit of smoke if i rev her hard just after i started her. other than that she runs fine.
She only burns a tad bit of oil, in a trip of 450+ Kilometers, at a speed no slower than 130 kph, she was still in operating range and I had to add just a small amount.
I only get a bit of smoke if i rev her hard just after i started her. other than that she runs fine.