cam caps and sealing
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
cam caps and sealing
Once again i come to the forum seeking knowledge.......
When replacing the cam chains and tensioners do you have to put a sealant under the front cam cap between the cap and head surface to stop oil squeezing out the front face and down the engine.
I understand the need to put sealant at the 4 corners and front edges between casket and cam cover...BUT am uncertain in regard to under the front cam cap where the seals are.
Anyone done the job
When replacing the cam chains and tensioners do you have to put a sealant under the front cam cap between the cap and head surface to stop oil squeezing out the front face and down the engine.
I understand the need to put sealant at the 4 corners and front edges between casket and cam cover...BUT am uncertain in regard to under the front cam cap where the seals are.
Anyone done the job
Race Car
Joined: Apr 2006
Posts: 4,772
Likes: 2
From: South Florida
Archive Gatekeeper
Rennlist Member
Rennlist Member
Joined: Sep 2002
Posts: 18,832
Likes: 4,031
From: Irvine, CA
By cam caps do you mean the front and rear cam bearing saddles, or the circular sealing covers that cover the ends of the cams? There was a nice sheet of Loctite 574 under the cam caps on the '91 motor I disassembled. Gives that nice whiff of anaerobic sealer when you pop the saddle off. Don't recall any sealer on the round covers, nor is there anything in the WSM about it.
Team Owner
Joined: May 2004
Posts: 31,279
Likes: 4,248
From: Philly PA
add some loctite 574 to the cam caps, so oil wont seep out. ( just the end caps)
also add some hondabond to the head/cap joint ( where the edge of the cap meets the head) to seal the cam cover gasket in this joint
also add some hondabond to the head/cap joint ( where the edge of the cap meets the head) to seal the cam cover gasket in this joint
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
By cam caps do you mean the front and rear cam bearing saddles, or the circular sealing covers that cover the ends of the cams? There was a nice sheet of Loctite 574 under the cam caps on the '91 motor I disassembled. Gives that nice whiff of anaerobic sealer when you pop the saddle off. Don't recall any sealer on the round covers, nor is there anything in the WSM about it.
When I pulled the cams hence the bearing saddles I didnt see any sealant under the "saddle" between saddle and head face.
I thought this was a concern for leakage.
The rears should be OK as there is the question of shorter cams and I have updated to the dowell plugs in the oil journal.
Your view is appreciated.
Regs
Peter
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
thanks for the link I will be unable to view at work as we have a block on streaming sites...so at a pinch I will view tonight at home.
Thankyou
Peter
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
So under the front and rear caps between cap and head face even with the shorter cams and no real pressure at the rear as it has the upgraded dowells.
Regs
Peter
Trending Topics
In Your Face, Ace
Rennlist Member
Rennlist Member
Joined: Jun 2001
Posts: 11,120
Likes: 7
From: New Orleans
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche's Top 5 Most Questionable Naming Decisions
Verdad Gallardo
Pogea Racing's 964 Porsche 911 Reimagination Stands Out in a Crowded Field
Verdad Gallardo
6 Convertible Top MYTHS Most People Don't Understand!
Michael S. Palmer
2026 Porsche 911 Club Coupe is Spectacular, And Everything Wrong with the Porsche Market
Joe Kucinski
Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million
Verdad Gallardo
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Team Owner
Joined: May 2004
Posts: 31,279
Likes: 4,248
From: Philly PA
If you take a fresh razor blade and hold it perpendicular to the surface of the head sealing are and rub it back and forth you find a small bit of white powder coming off the sealing area(____I_____ I= the perpendicular blade) also clean the end caps the same way, acetone can be used once the blade has been used
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
If you take a fresh razor blade and hold it perpendicular to the surface of the head sealing are and rub it back and forth you find a small bit of white powder coming off the sealing area(____I_____ I= the perpendicular blade) also clean the end caps the same way, acetone can be used once the blade has been used
So both front and rear..??
Team Owner
Joined: May 2004
Posts: 31,279
Likes: 4,248
From: Philly PA
if you remove a cap then you must reseal it.
if you dont remove the cap then dont touch it if it isnt seeping oil.
Still use the hondabond for the head to cap angle( this helps the gasket to seal better and prevent leaking)
if you dont remove the cap then dont touch it if it isnt seeping oil.
Still use the hondabond for the head to cap angle( this helps the gasket to seal better and prevent leaking)
Thread Starter
Racer
Joined: Oct 2008
Posts: 361
Likes: 0
From: Northern Territory, Australia
