Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Sudden noise, WTF not more problems SOLVED THANKS GUYS
DavidSweden
post Jun 20 2016, 09:44 AM
Post #1


Member
**

Group: Members
Posts: 481
Joined: 8-June 14
From: Sweden
Member No.: 17,452
Region Association: Scandinavia
Well having repaired the jacking point, floor and other parts I was looking forward to driving my car during the short Swedish summer...but no (IMG:style_emoticons/default/headbang.gif) (IMG:style_emoticons/default/headbang.gif)

I was driving along merrily when suddenly I hear a noise that made me think of bad exhaust header, there was also a slight loss of power. Back at the garage I got under the car and removed the tins under 3/4 thats where the noise was coming from, no sign of exhaust header leakage. The noise is really bad, the only other thing i can think of is head gasket but I cant see anything.

The engine a 2.0 CG was rebuilt last year (by me) and I did use head gaskets, the engine has done< 1000 km since the rebuild

If members have any ideas about how to go about diagnosing this problem then please let me know, thanks
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ChrisFoley
post Jun 20 2016, 09:59 AM
Post #2


I am Tangerine Racing
*****

Group: Members
Posts: 7,986
Joined: 29-January 03
From: Bolton, CT
Member No.: 209
Region Association: None
Check the spark plugs for one that came out.
Also check the air injection ports, although a missing plug in an air injection port shouldn't affect running - just make bad noise.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Jun 20 2016, 09:59 AM
Post #3


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
Bad head gasket makes a whistling or a mouse on steroids "squeak-squeak" noise.
Shit load of noise is a blown out sparkplug.
Valve adjuster way out of whack, real tight or way loose is a dropped or sunken seat.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DavidSweden
post Jun 20 2016, 10:20 AM
Post #4


Member
**

Group: Members
Posts: 481
Joined: 8-June 14
From: Sweden
Member No.: 17,452
Region Association: Scandinavia
QUOTE(Racer Chris @ Jun 20 2016, 07:59 AM) *

Check the spark plugs for one that came out.
Also check the air injection ports, although a missing plug in an air injection port shouldn't affect running - just make bad noise.


Sparkplugs are ok, the air injection ports were plunged with NPT plugs. If one of these has worked its way loose it'll mean dropping the engine but they were screwed in pretty hard


QUOTE(Mark Henry @ Jun 20 2016, 07:59 AM) *

Bad head gasket makes a whistling or a mouse on steroids "squeak-squeak" noise.
Shit load of noise is a blown out sparkplug.
Valve adjuster way out of whack, real tight or way loose is a dropped or sunken seat.


There is a shit load of noise, no mouse on steroids.
I guess a leak down or compression test is in order? (IMG:style_emoticons/default/confused24.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Jun 20 2016, 10:23 AM
Post #5


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
NPT plugs? those are metric threads.

You can't stick a probe in to see if they are still there?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DavidSweden
post Jun 20 2016, 10:29 AM
Post #6


Member
**

Group: Members
Posts: 481
Joined: 8-June 14
From: Sweden
Member No.: 17,452
Region Association: Scandinavia
QUOTE(Mark Henry @ Jun 20 2016, 08:23 AM) *

NPT plugs? those are metric threads.

You can't stick a probe in to see if they are still there?


I think the original pipe had a tapered pipe thread.
I will poke around in the holes and see if they are there
Thanks
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ThePaintedMan
post Jun 20 2016, 11:01 AM
Post #7


Advanced Member
****

Group: Members
Posts: 3,887
Joined: 6-September 11
From: St. Petersburg, FL
Member No.: 13,527
Region Association: South East States
Before you go through the trouble of a compression and/or leakdown test, I would go ahead and pull the valve cover off. If it's making that much noise, you'll probably have some visual evidence of the problem in the valvetrain.

But of course, if you find a missing or loose spark plug, then you'll already know what the problem is.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jun 20 2016, 03:00 PM
Post #8


Custom Member
***************

Group: Members
Posts: 24,705
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
Did you weld up the head tins?
The injection ports should be visible....unless they are covered now....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
era vulgaris
post Jun 20 2016, 04:35 PM
Post #9


J is for Genius
***

Group: Members
Posts: 983
Joined: 10-November 13
From: Raleigh, NC
Member No.: 16,629
Region Association: South East States
Have you checked the intake manifold gaskets for a vacuum leak?

I had an intake gasket fail on me earlier this year while driving. Made the most god awful noise along with a significant loss of power.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DavidSweden
post Jun 21 2016, 04:23 AM
Post #10


Member
**

Group: Members
Posts: 481
Joined: 8-June 14
From: Sweden
Member No.: 17,452
Region Association: Scandinavia
QUOTE(Racer Chris @ Jun 20 2016, 07:59 AM) *

Check the spark plugs for one that came out.
Also check the air injection ports, although a missing plug in an air injection port shouldn't affect running - just make bad noise.


Problem solved! I would like to give a big thank you to everyone who helped. Chris hit the nail on the head when he suggested taking a look at the air injection ports, I don't think I would have thought of that myself. One of the plugs had come loose. I didn't have a metric Allen key so I just pushed it in, now shes purring like a kitten.

Surprising that so much noise can come from such a small hole...no joke intended
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Jun 21 2016, 05:56 AM
Post #11


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
QUOTE(DavidSweden @ Jun 21 2016, 06:23 AM) *



Surprising that so much noise can come from such a small hole...

I take it you don't have kids... (IMG:style_emoticons/default/dry.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BeatNavy
post Jun 21 2016, 06:15 AM
Post #12


Certified Professional Scapegoat
****

Group: Members
Posts: 2,951
Joined: 26-February 14
From: Easton, MD
Member No.: 17,042
Region Association: MidAtlantic Region
QUOTE(Mark Henry @ Jun 21 2016, 07:56 AM) *

QUOTE(DavidSweden @ Jun 21 2016, 06:23 AM) *



Surprising that so much noise can come from such a small hole...

I take it you don't have kids... (IMG:style_emoticons/default/dry.gif)

Nice (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Kansas 914
post Jun 21 2016, 08:15 AM
Post #13


Advanced Member
****

Group: Members
Posts: 2,999
Joined: 1-March 03
From: Durango, Colorado
Member No.: 373
Region Association: Rocky Mountains
QUOTE(Mark Henry @ Jun 21 2016, 05:56 AM) *

QUOTE(DavidSweden @ Jun 21 2016, 06:23 AM) *

Surprising that so much noise can come from such a small hole...

I take it you don't have kids... (IMG:style_emoticons/default/dry.gif)

(IMG:style_emoticons/default/lol-2.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SLITS
post Jun 21 2016, 01:51 PM
Post #14


"This Utah shit is HARSH!"
**********

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None
I used 3/8" NPT pipe caps to plug the air injection tubes. One came off in the middle of the mile long tunnel going into Zion Nat'l Park. It sounded like a war zone. Slightly less loud than 3 kids Mike.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 9th May 2025 - 01:26 AM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
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 ...