|
|

|
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. |
|
|
| DavidSweden |
Jul 14 2015, 04:32 AM
Post
#1
|
|
Member ![]() ![]() Group: Members Posts: 481 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
Some of you may have read my earlier pleas for help when my engine suddenly would not start. I thought it was the FI but after following the advice of members I did a compression and leak down test and discovered Zero compression and 100% leakage on #2.
With a heavy heart I pulled the engine, the pictures say it all. I had the heads rebuilt earlier this year and have not done more than 300 miles. (IMG:style_emoticons/default/mad.gif) Some questions: what else needs to be checked for damage? I need some new heads does anyone have some ready to use heads for a 75 2.0? I guess the piston is also unusable, if I get some aftermarket P&C can I just install them without replacing the bushings on the connecting rods? I guess the summer will be over before the engine is fixed. (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1436869957.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1436869958.2.jpg) |
![]() ![]() |
| Cj Honeycutt |
Jul 19 2015, 05:57 PM
Post
#2
|
|
Member ![]() ![]() Group: Members Posts: 50 Joined: 7-August 10 From: Fallbrook, CA Member No.: 12,020 Region Association: Southern California |
Agree with taking them back for a refund, but NOT work/rework. If the person repacked parachutes, would you go back ? Not likely. Get as much money back as you can.
The used heads you have coming have many advantages to yours reworked (by anyone) as many have already suggested. I want to add my 2 cents: The used heads have already been thermal cycled many, many times and are still OK (assumption here) based on the seller and you agreeing they are "good heads". So, the chances of a seat failure are unlikely if all other aspects of your engine running are as they should be. This option for you seems like the best based on the information you provided to the Board. Here is my 2 cents: Remove the valve keepers and spring(s) from each of the four exhaust valves prior to installing. Push the exhaust valve open with your finger about what the cam would when installed. Then, rock the valve face perpendicular to the valve shaft back and fourth, then move your fingers 90 degrees and repeat. If the valve rocks about 3 mm to each side, you need guides and will most likely have smoke when you lift as the intakes will also be worn only not as much. Installing Silcon Bronze guides and hand lapping the valves (your self) will buy you some time with the used heads. If the rocking of the valves is less than the above, you are good for many, many carefree miles. Spend the time enjoying your used heads saving to have your original heads done up right by the folks I and several others have recommend as the heads are the key to the 2.0 engine long life and performance. Spend the money on heads as the stock bottom end is nearly bullet proof when taken care of. Hope this helps. CJ |
| DavidSweden |
Jul 20 2015, 09:57 AM
Post
#3
|
|
Member ![]() ![]() Group: Members Posts: 481 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
I pulled the head for #3/4 this afternoon and got more bad news. The intake valve seat on #3 had dropped. The piston has hit the intake valve and broken the rocker arm.
(IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1437407864.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1437407864.2.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1437407864.3.jpg) I found a Rocker arm for a type IV it has the same part # can anyone say if its the correct part for a 2.0 76? Help much appreciated as I am beginning to get a little disheartened |
DavidSweden Found the problem Jul 14 2015, 04:32 AM
falcor75 Aow that really sucks :( Jul 14 2015, 04:56 AM
wndsrfr Looks to me that you should get the valve seat rep... Jul 14 2015, 05:52 AM
billh1963 I would like to think that the piston is okay....b... Jul 14 2015, 06:05 AM
RobW What a bummer, but at least you are going for it... Jul 14 2015, 06:24 AM
Cairo94507 Oh no! That sucks beyond belief. I hope dama... Jul 14 2015, 06:47 AM
Cj Honeycutt The pistons take a much worse pounding with each c... Jul 14 2015, 07:09 AM
cwpeden That doesn't look so bad. Head can be saved.
... Jul 14 2015, 07:25 AM
914_teener
That doesn't look so bad. Head can be saved.
... Jul 14 2015, 08:56 AM
Mark Henry When rebuilt was the seat replaced?
Seat looks od... Jul 14 2015, 09:09 AM
Valy The piston is good, just buff the top.
The head ne... Jul 14 2015, 09:24 AM
screenguy914 Some here have pretty good observation skills to a... Jul 14 2015, 10:45 AM
Cj Honeycutt The piston crown is designed to take much abuse. S... Jul 14 2015, 11:10 AM
DavidSweden
The piston crown is designed to take much abuse. ... Jul 17 2015, 11:08 AM
whitetwinturbo .......................unless the pins holding the... Jul 14 2015, 01:17 PM
Cj Honeycutt The piston pin is THE most robust part of the enti... Jul 14 2015, 01:41 PM
rfinegan If the lands are not damaged then blending the edg... Jul 17 2015, 11:18 AM
veekry9 Buff?
Nah,Pull the cylinders,check the rod for ben... Jul 17 2015, 02:36 PM
Dave_Darling Send BOTH HEADS to Len at HAM. One intake seat ca... Jul 17 2015, 07:35 PM
Cj Honeycutt
Send BOTH HEADS to Len at HAM. One intake seat c... Jul 18 2015, 05:37 PM
McMark Safe way: check everything
Fast way: leave the cyl... Jul 17 2015, 10:38 PM
euro911 I've had worse looking pistons. I had about 70... Jul 19 2015, 01:31 AM
Dave_Darling I gave one shop three chances at that. I finally ... Jul 19 2015, 10:39 AM
brant There is a chance the rod is now slightly bent. S... Jul 19 2015, 11:09 AM
rhodyguy Shipping a set back and forth will cost a fortune.... Jul 19 2015, 12:23 PM
euro911 Shipping a set back and forth will cost a fortune.... Jul 19 2015, 01:02 PM
DavidSweden
Shipping a set back and forth will cost a fortune... Jul 19 2015, 02:13 PM
rhodyguy See post #1 mark. Jul 19 2015, 01:22 PM
euro911 See post #1 mark.I know my eyes have gotten worse ... Jul 19 2015, 02:06 PM
Cj Honeycutt Crap ! In this case, the push rod is almost fo... Jul 20 2015, 10:37 AM
Valy When did you last adjust the valves? Did you have ... Jul 20 2015, 11:53 AM
DavidSweden
When did you last adjust the valves? Did you have... Jul 20 2015, 12:06 PM
stugray
Perhaps the rocker failure and the seat failure ... Jul 20 2015, 05:34 PM
DavidSweden
Perhaps the rocker failure and the seat failure... Jul 21 2015, 02:20 AM
DavidSweden The shop that rebuilt my heads opened today after ... Jul 27 2015, 10:31 AM
Valy
The shop that rebuilt my heads opened today after... Jul 27 2015, 06:16 PM
Spoke
In other words it was not due to a bad workmanshi... Jul 27 2015, 08:26 PM
euro911 Interesting that you didn't see low compressio... Jul 20 2015, 02:26 PM
DavidSweden
Interesting that you didn't see low compressi... Jul 20 2015, 02:56 PM
Valy Can you push open the valves that broke/bent the v... Jul 20 2015, 02:58 PM
DavidSweden
Can you push open the valves that broke/bent the ... Jul 20 2015, 03:14 PM
arkitect Makes me wonder what the shop did wrong that the s... Jul 21 2015, 03:42 AM
Racer Chris No, the shop owner is a lying liar. Jul 27 2015, 11:44 AM
Dave_Darling
No, the shop owner is a lying liar.
Either that... Jul 27 2015, 08:18 PM
porschetub Some shops have no idea how much interferance fit ... Jul 27 2015, 02:04 PM
Cairo94507 I would say to post the name of the shop.....but g... Jul 27 2015, 05:23 PM![]() ![]() |
|
Lo-Fi Version | Time is now: 2nd April 2026 - 03:51 PM |
| All rights reserved 914World.com © since 2002 |
|
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |