Welcome to the all new Geo Metro Forum. We hope you enjoy your visit.You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are features you can't use and images you can't see. Registration is simple, fast, and completely free. If you're already a member please log in to your account to access all of our features: Join our community! |
| Can someone explain... | |
|---|---|
| Tweet Topic Started: Aug 28 2014, 08:48 PM (687 Views) | |
| Morty | Aug 28 2014, 08:48 PM Post #1 |
|
New Member
![]() ![]() ![]() ![]()
|
Can someone explain these holes in the block that go all the way through down to the crank (bottom of the picture)? The head gasket doesn't cover them completely, wouldn't oil get shot up through there? What's the point?
|
![]() |
|
| Metromightymouse | Aug 28 2014, 08:52 PM Post #2 |
|
Powdercoat Wizard
![]()
|
Those are drain back holes for oil coming from the head. |
![]() |
|
| clarkdw | Aug 28 2014, 09:07 PM Post #3 |
![]()
|
The long slots at the opposite side of the block are actually the drain back points. They are lower when the engine is installed. The round holes are meant to allow the blowby gasses from the sump to make their way up to the valve cover and then through the pcv system back into the combustion chamber to burn off the vapor. If there was no outlet from the crank area to the valve cover to relieve pressure then it would keep building till it blew out the front or rear crankshaft seal. |
![]() |
|
| Metromightymouse | Aug 28 2014, 09:27 PM Post #4 |
|
Powdercoat Wizard
![]()
|
guess I shouldn't post when I have had way to little sleep...
|
![]() |
|
| chessir | Aug 28 2014, 10:31 PM Post #5 |
![]()
|
The round holes around the cylinders is for "lemonade" or red colored coolant. |
![]() |
|
| Bad Bent | Aug 29 2014, 02:20 AM Post #6 |
|
Facetious Educated Donkey
![]()
|
Don't loose the check valve in the tiny hole. pictures.
|
![]() |
|
| calrenman | Aug 29 2014, 08:15 AM Post #7 |
|
Just another wrench.
![]()
|
|
![]() |
|
| Morty | Aug 29 2014, 08:18 AM Post #8 |
|
New Member
![]() ![]() ![]() ![]()
|
Funny you mention that, I found this "thing" on the floor after disassembling the motor and had no idea what it was. After extensive research on here, I found out what it was. I haven't let it out of my sight since.
|
![]() |
|
| myredvert | Aug 29 2014, 09:22 AM Post #9 |
|
myredvert
![]()
|
Mysteries of the G10... How do it know what color the coolant is? And where would a different colored coolant go, and how would it cool the cylinders if it can't go in the water jacket?
|
![]() |
|
| Bad Bent | Aug 29 2014, 02:15 PM Post #10 |
|
Facetious Educated Donkey
![]()
|
Does this help?
|
![]() |
|
| myredvert | Aug 29 2014, 02:58 PM Post #11 |
|
myredvert
![]()
|
Hep what? I wasn't wondering about the circulation pattern, I was curious how the engine actually knew the difference between different color coolants because someone mentioned that "those holes" are for particular "colors" of coolant and I thought... Nevermind! |
![]() |
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · Engine Tech & Diagnostics · Next Topic » |


Welcome to the all new Geo Metro Forum. We hope you enjoy your visit.


![]](http://z3.ifrm.com/static/1/pip_r.png)





guess I shouldn't post when I have had way to little sleep...


3:48 AM Jul 11