 engine advice please |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| speyer911 |
 Mar 25 2013, 12:06 PM
Post
#1
|
|
Newbie  Group: Members Posts: 2 Joined: 11-March 12 From: NH Member No.: 14,240 Region Association: North East States  |
 My engine is underpowered even by 914-4 standards, low compression one cylinder, bad clutch and back oil leak. So dropped the engine. Now what? Any suggestions on how to find out if its bad head vs cylinder? plan to replace pushrod tube seals and clutch as well as SS exhaust. anything else I should do? Thanks in advance. |
   |
 
|
| Mblizzard |
Mar 25 2013, 04:09 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
What size is it? Miles? Recent rebuilds?
If you have it on the ground it is hard not to consider new rings and a valve job. But of course your budget dictates what to consider. A good machine shop can check your heads and see how much work they need. Unless you have obviously damaged pistons or jugs, that might be all you need. But a check of the tolerances for the lower may tell you if you need to go deeper or just to do the top. I am sure you will get some more specific guidance from others but that is kind of the most basic approach. |
|
|
|
| type47 |
Mar 25 2013, 04:33 PM
Post
#3
|
|
Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
How about rebuilding the heads, honing the cylinders, new rings, powdercoating the cooling tin and induction parts, cleaning the short block, assembling, installing and driving? Driving season is upon us and the last thing I'd want is my 914 up on jackstands.
|
|
|
|
| Cairo94507 |
Mar 25 2013, 04:37 PM
Post
#4
|
|
Michael Group: Members Posts: 10,130 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California 
|
You can also just look for another running engine here. They pop up all the time on here from cars being upgraded to sixes. Keep your eyes open and you could find a nice 2.0.
|
 |
|
| nathansnathan |
Mar 25 2013, 04:45 PM
Post
#5
|
|
Senior Member Group: Members Posts: 1,052 Joined: 31-May 10 From: Laguna Beach, CA Member No.: 11,782 Region Association: None |
If you take the heads off, do a "spirits test". Pour paint thinner in them and see if the valves leak. If they do, you can take the valve out (need a valve spring compressor) and see if you burned one from your valves being tight/held open. A good valve will have shiny ring around the edge where it seats. A burned one won't have that. Chances are you find a burned valve on the cylinder that is low.
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 26th December 2024 - 09:12 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.