Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Do I need to mill my timing cover since my block was decked?

Thread Tools
 
Search this Thread
 
Old 12-04-2008, 04:54 PM
  #1  
Registered User
Thread Starter
 
tim a.'s Avatar
 
Join Date: Aug 2005
Posts: 183
Likes: 0
Received 0 Likes on 0 Posts
Do I need to mill my timing cover since my block was decked?

Seems like I should,but I never have thought about it until I started putting it together.My shop took .07 off the deck so i guess they need to take that off the cover.Its a 22re by the way.Thanks for insight.
Old 12-04-2008, 05:55 PM
  #2  
Registered User
 
874runnersr5's Avatar
 
Join Date: May 2008
Location: Calgary, AB Canaduh
Posts: 3,948
Received 11 Likes on 7 Posts
Yeah alot of people forget that, you should do it to the timing cover.
Old 12-04-2008, 06:00 PM
  #3  
Registered User
 
TOYOTA 1's Avatar
 
Join Date: Feb 2008
Location: oregon
Posts: 2,799
Likes: 0
Received 3 Likes on 3 Posts
yea, the machine shop should have told you about that!
Old 12-04-2008, 08:39 PM
  #4  
Registered User
 
Pistonman's Avatar
 
Join Date: Dec 2007
Location: Kingston, Washington
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
Yes, you need to.
Old 12-04-2008, 09:11 PM
  #5  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
it should've been bolted to the block when it was cut.
hope they can get it right without causing issues sealing with the head.
Old 12-05-2008, 01:25 PM
  #6  
Registered User
 
annoyingrob's Avatar
 
Join Date: Aug 2008
Location: Calgary, AB
Posts: 1,068
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by abecedarian
it should've been bolted to the block when it was cut.
hope they can get it right without causing issues sealing with the head.
If they take too much off, you can just FIPG the top of it.
Old 12-05-2008, 03:26 PM
  #7  
Registered User
 
drew303's Avatar
 
Join Date: Dec 2006
Location: Olympia, WA
Posts: 2,880
Likes: 0
Received 2 Likes on 2 Posts
Bolt it on and see if it's flush.

personally if its not flush I'd stick it on the belt sander. The top of the timing cover just needs to be flush. It's a not a pressure seal between the head and the cover, just an oil seal. It's just important it doesnt stick higher than the deck, because that could jeopardize the Head Gasket if the head is not on flush.

Having said all that, you may be able to manipulate the cover enough with the slack in the bolt holes to line it up flush. if your not comfortable with the bottom not being flush, that'd be a safer surface to grind down yourself since the pan uses FIPG or RTV vs the gasket used ontop.

just my .02
Old 12-05-2008, 03:47 PM
  #8  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by drew303
Bolt it on and see if it's flush.

personally if its not flush I'd stick it on the belt sander. The top of the timing cover just needs to be flush. It's a not a pressure seal between the head and the cover, just an oil seal. It's just important it doesnt stick higher than the deck, because that could jeopardize the Head Gasket if the head is not on flush.

Having said all that, you may be able to manipulate the cover enough with the slack in the bolt holes to line it up flush. if your not comfortable with the bottom not being flush, that'd be a safer surface to grind down yourself since the pan uses FIPG or RTV vs the gasket used ontop.

just my .02
the main issue with just manipulating it is the fact that the oil pump bolts to the cover and the drive gear is centered on the crankshaft, and then the front oil seal is centered to that. moving the timing cover down will affect clearances (read: bind the drive and driven gear) and have the front crank seal off-center.
.07" isn't much, but is a lot when dealing with gear mesh and seals.
and if that works, there's .07" protrusion by the timing cover into the oil pan sealing surface area.
Old 12-05-2008, 03:47 PM
  #9  
Registered User
 
TOYOTA 1's Avatar
 
Join Date: Feb 2008
Location: oregon
Posts: 2,799
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by drew303
Bolt it on and see if it's flush.

personally if its not flush I'd stick it on the belt sander. The top of the timing cover just needs to be flush. It's a not a pressure seal between the head and the cover, just an oil seal. It's just important it doesnt stick higher than the deck, because that could jeopardize the Head Gasket if the head is not on flush.

Having said all that, you may be able to manipulate the cover enough with the slack in the bolt holes to line it up flush. if your not comfortable with the bottom not being flush, that'd be a safer surface to grind down yourself since the pan uses FIPG or RTV vs the gasket used ontop.

just my .02

there are dowels in the block that wont let you, plus as abe said you dont want to use the slack in the bolt holes even if you could!

Last edited by TOYOTA 1; 12-05-2008 at 03:48 PM.
Old 12-05-2008, 03:48 PM
  #10  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by TOYOTA 1
there are dowels in the block, so you cant use the slack in the bolt holes!
/me smacks self....
yeah that's an issue too.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bigjstang
86-95 Trucks & 4Runners
20
08-25-2021 12:41 AM
Gamble_STi
86-95 Trucks & 4Runners
2
07-07-2015 07:54 PM
colinmil
Newbie Tech Section
2
07-06-2015 04:03 PM



Quick Reply: Do I need to mill my timing cover since my block was decked?



All times are GMT -8. The time now is 07:48 PM.