Discovery II Talk about the Land Rover Discovery II within.
Sponsored by:
Sponsored by:

Cylinder Head Installation Issue

Thread Tools
 
Search this Thread
 
  #11  
Old 05-08-2013, 12:56 PM
jfall's Avatar
TReK
Join Date: Mar 2012
Posts: 3,171
Likes: 0
Received 44 Likes on 37 Posts
Default

Yes you can run it as is.
Just be on the watch for overheating.

Fill it up with antifreeze.
Bleed it.

Then raise the coolant tank way high.
Try to run it for 5 minutes with the cap off of the coolant tank.
If it blows out tons of antifreeze - then your head gasket job may be failed.

If it does not blow out antifreeze, then bleed it some more
and enjoy the ride.
 
  #12  
Old 05-08-2013, 03:10 PM
Disco Mike's Avatar
Administrator
Join Date: Apr 2006
Location: Denver, Colorado
Posts: 25,707
Likes: 0
Received 99 Likes on 81 Posts
Default

Originally Posted by james.martin1
Unfortunately I did not read this until after I got the engine reassembled. When I put the bolts in I did use thread lube but I did not remember to clean out the holes in the block. The bolts were all turned at least an additional 50' after being torqued to 15 ft/lbs. Since I will have to buy new parts to re-do the heads, I want to just run the engine as is. Will I definitely blow the head gasket again trying to run the engine like this? Sorry if this is a dumb question.
Can you say, "HUG MISTAKE"?
Your running the engine the way it was put back together will just cause you more expense and damage.
 
  #13  
Old 05-09-2013, 02:08 AM
jfall's Avatar
TReK
Join Date: Mar 2012
Posts: 3,171
Likes: 0
Received 44 Likes on 37 Posts
Default

If all your head bolts made the 3rd turn OK.

Meaning
15lbs turn 1
90 degree turn 2.

90 degree turn 3. And, you say then the torque wrench tripped.
If it tripped at 70 degrees or greater, I would not worry about it.

most people screw up the turns anyway by 20 degrees at least.
 
  #14  
Old 05-09-2013, 08:05 AM
roverguy7's Avatar
Pro Wrench
Join Date: Apr 2008
Posts: 1,475
Likes: 0
Received 35 Likes on 30 Posts
Default

Originally Posted by jfall
If all your head bolts made the 3rd turn OK.

Meaning
15lbs turn 1
90 degree turn 2.

90 degree turn 3. And, you say then the torque wrench tripped.
If it tripped at 70 degrees or greater, I would not worry about it.

most people screw up the turns anyway by 20 degrees at least.
This is correct, the degree of turn is not entirely critical, the bolt will stretch to the correct clamping force, break if it's gone too far, or not stretch at all. Biggest issue with not getting the full 90 on the last turn would be the bolt either not stretched, or just barely stretched, and able to loosen over time.

That said, the way I read the previous posts, didn't seem like you got enough to really stretch them, so I would not recommend driving it.
 
  #15  
Old 05-09-2013, 09:03 AM
drowssap's Avatar
Baja
Join Date: Feb 2011
Location: Boston Strong
Posts: 9,298
Received 317 Likes on 311 Posts
Default

if it is hydrolock and you start it what do you think is going to happen to the water trapped in the holes? yes; your right it will heat up and expand, and where do you think it will go when it expands?
 
  #16  
Old 05-09-2013, 10:00 AM
Disco Mike's Avatar
Administrator
Join Date: Apr 2006
Location: Denver, Colorado
Posts: 25,707
Likes: 0
Received 99 Likes on 81 Posts
Default

It will put a connecting rod and or piston thru the side of the engine and usually damage the head.
 
  #17  
Old 05-09-2013, 11:45 AM
james.martin1's Avatar
Mudding
Thread Starter
Join Date: May 2013
Location: Massachusetts
Posts: 117
Received 2 Likes on 2 Posts
Default

I think i'm going to take it down again this weekend, it should be pretty fast since I just did it anyway. I still have a few questions though. After I reassembled the engine I tried to start it but it was misfiring badly and would not run for more than a few seconds. Should I order a new gasket set with the head bolts? Would it be worth it to have the machine shop re-check the heads? Is atlantic british good about overnighting parts? Thanks for the help.
 
  #18  
Old 05-09-2013, 05:14 PM
jfall's Avatar
TReK
Join Date: Mar 2012
Posts: 3,171
Likes: 0
Received 44 Likes on 37 Posts
Default

It is your money.
Machine shop to check the heads - sure. It is only money.

Buy Victor Reinz Head gaskets. They are quality.
Get new stretch bolts.
Clean the holes.
Have a go at it again.

I would not use a torque wrench for the 90 degree turns.
Just a sturdy pipe.

I used an iron gas pipe I slipped onto a breaker bar.

Here is the gory detail

Flickr: Landroverdude2's Photostream
 
  #19  
Old 05-10-2013, 06:05 AM
drowssap's Avatar
Baja
Join Date: Feb 2011
Location: Boston Strong
Posts: 9,298
Received 317 Likes on 311 Posts
Default

yes, you will need a new kit and new bolts.
yes, AB is very good about overnight shipping.
24 inch breaker bar is plenty to tight the head bolts
 
  #20  
Old 05-12-2013, 07:03 PM
james.martin1's Avatar
Mudding
Thread Starter
Join Date: May 2013
Location: Massachusetts
Posts: 117
Received 2 Likes on 2 Posts
Default

The engine is stripped down to the valley pan now, I have just been waiting for the weather to clear to finish the job (no garage). AB did get the parts out same day, but I can't say I was satisfied with FedEx's "overnight" shipping. I will definitely use UPS next time. Are there any things I should watch for or examine while i'm changing the heads?
 

Last edited by james.martin1; 05-12-2013 at 07:15 PM.


Quick Reply: Cylinder Head Installation Issue



All times are GMT -5. The time now is 04:14 AM.