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 )

> Experimental Cam for 2.0 w/ variable timing, plus pic's
76-914
post Feb 13 2011, 08:36 PM
Post #1


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
In a prior post I mentioned that I was going to pull the drive train to check out the p/o's alledged rebuild. They said that they couldn't get it to idle. I found alot of blue silicone from the rebuild. Not good. Coupled with the fact that they had installed a hodge podge of FI components I decided to check out this ol' boys work. P&C's looked pretty new (I'll let the machine shop decide that) so I was hoping that everything else was too.

I almost (IMG:style_emoticons/default/stromberg.gif) in my shoes when I pulled the oil pump.

Attached Image

This bolt is not only bent but had backed out 3 threads. The one below it was hand tight.

Attached Image

looking at the back side you can see the difference in bolt lengths

Attached Image

They had to have heard this.

Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 17)
SLITS
post Feb 13 2011, 08:41 PM
Post #2


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

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None
It is hard to tell if they purposely made the cam timing adjustable by enlongating the mounting holes of if that occured due to the fastner head hitting the oil pump.

On the stand, you should have not been able to turn it by hand.

Nice job!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jake Raby
post Feb 13 2011, 09:54 PM
Post #3


Engine Surgeon
*****

Group: Members
Posts: 9,398
Joined: 31-August 03
From: Lost
Member No.: 1,095
Region Association: South East States
This was common around Y2K.. A whole batch of cam gears ending up being soft and they'd not hold torque.. It happened to me on one occasion.

Also, the oil pump drive tang is protruding too deep into the drive slot of the cam.. See those two shiny spots where the corners of the oil pump drive have been hitting deep inside the drive slot??

I bet the cam thrust bearings are trashed and the cam is walking fore and aft in the case, that could be why the bolts contacted the oil pump as well.

Start taking it apart.

This post has been edited by Jake Raby: Feb 13 2011, 09:57 PM
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Feb 13 2011, 10:13 PM
Post #4


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
(IMG:style_emoticons/default/agree.gif)
Yup, nothing good there. Take it apart and build something new. Those are some nasty pics.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
silver74insocal
post Feb 13 2011, 11:59 PM
Post #5


Senior Member
***

Group: Members
Posts: 736
Joined: 26-November 09
From: rancho cucamonga
Member No.: 11,073
Region Association: Southern California
what a great excuse to build a new engine! (IMG:style_emoticons/default/smilie_pokal.gif) maybe a conversion (IMG:style_emoticons/default/idea.gif) we need a subie around here...you go first?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sean_v8_914
post Feb 14 2011, 09:55 AM
Post #6


Chingon 601
****

Group: Members
Posts: 4,011
Joined: 1-February 05
From: San Diego
Member No.: 3,541
Custom with a C = good
Kustom with a K = that might kinda work
Qustom with a Q = questionable
Zustom with a Z =because it makes no sense at all
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Feb 14 2011, 09:38 PM
Post #7


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
QUOTE(Jake Raby @ Feb 13 2011, 07:54 PM) *

This was common around Y2K.. A whole batch of cam gears ending up being soft and they'd not hold torque.. It happened to me on one occasion.

Also, the oil pump drive tang is protruding too deep into the drive slot of the cam.. See those two shiny spots where the corners of the oil pump drive have been hitting deep inside the drive slot??

I bet the cam thrust bearings are trashed and the cam is walking fore and aft in the case, that could be why the bolts contacted the oil pump as well.

Start taking it apart.

I see it now that you point it out. I wouldn't have known if you hadn't said, thx. Todd at RIMCO mentioned that the oil pump wasn't original and it need to be brazed on the other side of the scarring.(yep, stripped it and dropped it off to them today) That time frame for the bad timing gears is exactly spot on with what the p/o had said. It's getting a Raby 9550 kit w/8300 gear, as soon as they call back to say the case is good.

QUOTE(silver74insocal @ Feb 13 2011, 09:59 PM) *

what a great excuse to build a new engine! (IMG:style_emoticons/default/smilie_pokal.gif) maybe a conversion (IMG:style_emoticons/default/idea.gif) we need a subie around here...you go first?

If I somehow ended up with a nice Boxter needing an engine, I would do it but not on my 914.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
'73-914kid
post Feb 14 2011, 09:58 PM
Post #8


Senior Member
***

Group: Members
Posts: 1,473
Joined: 1-November 08
From: Vista, CA
Member No.: 9,714
Region Association: Southern California
Dont forget Yustom with a Y Sean, for Why the hell would you you ever do something like that!?

That looks horrendous Kent... Looks like it was run a long time like that. Lok forward to seeing everything back together, and the black car on the road!

-Ethan
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Woody
post Feb 14 2011, 10:11 PM
Post #9


Sandbox Rabblerouser and head toilet scrubber
****

Group: Members
Posts: 3,858
Joined: 28-December 10
From: San Antonio Texas
Member No.: 12,530
Region Association: Southwest Region
Can't believe that thing would idle at all.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
HarveyH
post Feb 15 2011, 07:25 AM
Post #10


Member
**

Group: Members
Posts: 450
Joined: 19-June 03
From: Downingtown, PA
Member No.: 843
Happened to me too. PO had the engine rebuilt and modded (2056 cam & Webers) and about 5 years after I bought it a tick developed. Apparently the PO's builder didn't peen or locktite the cam gear bolts and three of them started walking out and eating the oil pump. My mechanic (since retired (IMG:style_emoticons/default/hissyfit.gif) ) was an old-school guy who had been doing street and race Porsches since the late 60's. We decided he would do a long term rebuild project and use the engine to teach his son how to do Type IV's so it was measured, assembled, measured, taken back apart, and so on several times before it was buttoned up the final time. Took 6 - 8 months, but the results were worth it.... Unfortunatly, I have to find a new mechanic now.....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
silver74insocal
post Feb 24 2011, 09:26 PM
Post #11


Senior Member
***

Group: Members
Posts: 736
Joined: 26-November 09
From: rancho cucamonga
Member No.: 11,073
Region Association: Southern California
(IMG:style_emoticons/default/popcorn[1].gif) any word?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Feb 24 2011, 10:41 PM
Post #12


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
Not yet. I'm calling them tomorrow = urgency = that's gonna cost me. (IMG:style_emoticons/default/blink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rick 918-S
post Feb 25 2011, 12:01 AM
Post #13


Hey nice rack! -Celette
***************

Group: Members
Posts: 20,826
Joined: 30-December 02
From: Now in Superior WI
Member No.: 43
Region Association: Northstar Region
Does anyone else see what looks like a crack in the cam flange starting at the short bolt on the left?



Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Feb 25 2011, 09:09 AM
Post #14


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
QUOTE(rick 918-S @ Feb 24 2011, 10:01 PM) *

Does anyone else see what looks like a crack in the cam flange starting at the short bolt on the left?

Good eye, Rick. When looking at from a side view. the material actually raises a bit where the 2 cracks are. But I really wasn't going to re-use it, honestly. (IMG:style_emoticons/default/happy11.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Feb 25 2011, 09:58 AM
Post #15


Advanced Member
****

Group: Members
Posts: 3,825
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None
I hate to say it, but if you had been in CO, I might say that was my old engine from college ~20 years ago.

Back then I bought the High Output pump from AA, and they never mentioned that I would have a clearance issue, so I put it together just like stock.

Never heard any ticking clicking or banging.

So the person I sold it to probably had issues later.

Oh well.... live & learn.

Stu
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Feb 25 2011, 10:41 AM
Post #16


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
QUOTE(stugray @ Feb 25 2011, 07:58 AM) *

I hate to say it, but if you had been in CO, I might say that was my old engine from college ~20 years ago.

Back then I bought the High Output pump from AA, and they never mentioned that I would have a clearance issue, so I put it together just like stock.

Never heard any ticking clicking or banging.

So the person I sold it to probably had issues later.

Oh well.... live & learn.

Stu

If I don't hear any "ticking clicking or banging" it ran out of gas. (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/laugh.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
majkos
post Feb 25 2011, 11:10 AM
Post #17


Senior Member
***

Group: Members
Posts: 1,370
Joined: 29-February 04
From: Mile High 914
Member No.: 1,729
Region Association: Rocky Mountains
Is that the same motor you drove to Moab and back!?
amazing (IMG:style_emoticons/default/unsure.gif)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Feb 25 2011, 09:58 PM
Post #18


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,647
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
No. Different one. I FU'd again. I got another one. A black 73. Hope your move goes well and that Henna adjusts.
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: Switch to: Standard · Linear+ · Switch to: Outline

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

- Lo-Fi Version Time is now: 27th December 2024 - 05:46 AM
Invision Power Board v9.1.4 © 2024  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 ...