Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
matt gineo's Avatar
 
Join Date: Jan 2012
Location: Newport, RI
Posts: 556
Garage
Timing Chain Tensioner Failure question?

I drove my 76 2.7 less than 2 miles yesterday at 25-30 mph, low rpm and as I got close to my driveway I started hearing a noise coming from the engine that I think may be a bad tensioner. I immediately shut it down when I heard the noise. I read this article (see below) and I'm praying that I didn't destroy the engine. How quickly will serious damage be done when a tensioner goes at the speed and duration I was doing?

Thanks

911 Timing Chain Tensioner Malfunction

By Roger W. Chaney
PCA Technical Committee Chairman

This is a frightening experience because some very expensive noises are heard from the engine when it happens. The sound is a medium intensity ratchetting which may or may not be noticeable at idle. The noise increases up to 2500 to 3000 rpm after which it disappears. There is a danger of slipping valve timing a slight amount if you run high rpm (over 5000) or load the engine heavily with this situation. There is no danger of throwing a timing chain off its sprockets or damaging the engine if you drive conservatively until you can correct the problem.

__________________
1976 911 Targa 2.7 CIS
Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior
1963 356 SC- crashed
1962 356 C- sold
1965- 912- sold- fun but too slow
Old 06-22-2012, 05:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
ROW '78 911 Targa
 
timmy2's Avatar
 
Join Date: Jul 2011
Location: Salem, OR
Posts: 10,214
Garage
Open it up and find out if that's what happened.
Replace the tensioners if that's the problem and check/set the camshaft timing.
If nothing slipped you're probably OK.
__________________
Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds.
Old 06-22-2012, 11:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
matt gineo's Avatar
 
Join Date: Jan 2012
Location: Newport, RI
Posts: 556
Garage
Quote:
Originally Posted by timmy2 View Post
Open it up and find out if that's what happened.
Replace the tensioners if that's the problem and check/set the camshaft timing.
If nothing slipped you're probably OK.
Great, hope you're right. No money left right now just paid 2nd daughters tuition bill.
__________________
1976 911 Targa 2.7 CIS
Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior
1963 356 SC- crashed
1962 356 C- sold
1965- 912- sold- fun but too slow
Old 06-23-2012, 06:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
ROW '78 911 Targa
 
timmy2's Avatar
 
Join Date: Jul 2011
Location: Salem, OR
Posts: 10,214
Garage
Any news on the noise?
__________________
Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds.
Old 06-27-2012, 09:22 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
matt gineo's Avatar
 
Join Date: Jan 2012
Location: Newport, RI
Posts: 556
Garage
Quote:
Originally Posted by timmy2 View Post
Any news on the noise?
Not yet, I'm a bit crazy at my job right now but hope to check things out in a week or so. Will keep you posted and thanks for asking. Still keeping my fingers crossed.
__________________
1976 911 Targa 2.7 CIS
Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior
1963 356 SC- crashed
1962 356 C- sold
1965- 912- sold- fun but too slow
Old 06-28-2012, 05:59 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
matt gineo's Avatar
 
Join Date: Jan 2012
Location: Newport, RI
Posts: 556
Garage
Good news!!

Quote:
Originally Posted by matt gineo View Post
Not yet, I'm a bit crazy at my job right now but hope to check things out in a week or so. Will keep you posted and thanks for asking. Still keeping my fingers crossed.
Well I finally found the time to remove the engine and open things up. It was definitely the timing chain tensioner failure. Fortunately there was minimal damage, it looks like the valves on one side have to be replaced, everything else looks just fine. Cylinder heads, pistons, rocker arm etc. all look perfect. I'm going to replace all of the usual oil leak seals while the engine is out. l'll also clean and paint the engine compartment, sheet metal etc while I have access. Going to go with Carrera tensioners.

Some good news, I discovered that the Head bolts were replaced by the PO.

__________________
1976 911 Targa 2.7 CIS
Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior
1963 356 SC- crashed
1962 356 C- sold
1965- 912- sold- fun but too slow
Old 07-23-2012, 03:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Reply


 


All times are GMT -8. The time now is 05:52 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.