Rising Sun Member Forums  

Go Back   Rising Sun Member Forums > Toyota 4x4 > General Tech Forum

Reply
 
Thread Tools
  #1  
Old 06-15-2010, 09:49 AM
MattFJ40 MattFJ40 is offline
Rock Stacker
 
Join Date: Jun 2010
Location: Colorado
Posts: 12
Default Engine Work?

My #2 cyl has no compression on my 2F (actually an imp F, but it is basically a 2F). Valves look OK, but I didn't take everything apart. Might be the rings. Anyway, I will probably have the motor rebuilt or buy a used motor and have it installed.

Who thinks I should rebuild? I am leaning toward having a good used motor to replace my current one. Who would be a good/trusted mechanic to do such work? I would do it myself, but things are crazy with a 9 month old at home and I don't want my FJ to be a paperweight for years while I slowly rebuild.

Any suggestions are welcome.

No 350 swap. Want to keep it Toyota.

Pictures are just for fun. No signs of what is wrong that I could see w/o pulling the head and looking inside the beast.
Attached Images
  

Last edited by MattFJ40; 06-15-2010 at 07:14 PM.
Reply With Quote
  #2  
Old 06-15-2010, 10:00 AM
nakman's Avatar
nakman nakman is offline
Rising Sun Commander
 
Join Date: Aug 2005
Location: north side
Posts: 9,911
Default

Quote:
Originally Posted by MattFJ40 View Post
...Who would be a good/trusted mechanic to do such work? .

This guy can make your 2F scream like a newborn.. http://www.risingsun4x4club.org/foru...ad.php?t=10843

(in a good way!)
__________________
99 uzj100, 05 525EXC

www.gamiviti.com

Reply With Quote
  #3  
Old 06-15-2010, 10:07 AM
Corbet's Avatar
Corbet Corbet is offline
Hard Core 4+
 
Join Date: Oct 2006
Location: Durango, Colorado
Posts: 3,908
Default

Robbie is your mechanic.

You may want to perform a leak down test to determine where your actual problem is. Could save you some money if all you really need is some head work.
__________________
Speski OffRoad LTD, Cargo Solutions for Toyota 4x4's http://www.SpeskiOffRoad.com
"80 series, with a fridge"
1976 FJ40, Project with little progress.
2004 Starcraft 10RT

Reply With Quote
  #4  
Old 06-15-2010, 10:22 AM
MattFJ40 MattFJ40 is offline
Rock Stacker
 
Join Date: Jun 2010
Location: Colorado
Posts: 12
Default

Quote:
Originally Posted by nakman View Post
This guy can make your 2F scream like a newborn.. http://www.risingsun4x4club.org/foru...ad.php?t=10843

(in a good way!)
I just got off the phone with Robbie. He is going to stop by and take a look.
Reply With Quote
  #5  
Old 06-15-2010, 10:27 AM
MattFJ40 MattFJ40 is offline
Rock Stacker
 
Join Date: Jun 2010
Location: Colorado
Posts: 12
Default

Quote:
Originally Posted by Corbet View Post
Robbie is your mechanic.

You may want to perform a leak down test to determine where your actual problem is. Could save you some money if all you really need is some head work.
I haven't gotten around to that yet. Wasn't sure if it was needed since I have no compression on that cyl and the plug looked like somebody hit it with a hammer. Funny thing is that the motor still runs. If it weren't for the lack of Vacuum when that cyl fires and the fact that it doesn't have compression on that cyl. Idles fine and doesn't make noise yet. I think I just caught it at the start. I am sure if i keep running it there will be a big mech failure (worse than I have now).
Reply With Quote
  #6  
Old 06-15-2010, 11:50 AM
Jacket's Avatar
Jacket Jacket is offline
Rising Sun Member
 
Join Date: Feb 2007
Location: Lafayette
Posts: 4,011
Default

Quote:
Originally Posted by MattFJ40 View Post
I just got off the phone with Robbie. He is going to stop by and take a look.
Very impressive. Robbie is road-tripping back from an extended work trip in California, but not too tired to make one last stop and help out a fellow Cruiser owner. Nice.
__________________
- Matt
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock
Reply With Quote
  #7  
Old 06-15-2010, 12:35 PM
TIMZTOY's Avatar
TIMZTOY TIMZTOY is offline
Hard Core 4+
 
Join Date: Apr 2009
Location: Denver
Posts: 1,884
Default

Quote:
Originally Posted by MattFJ40 View Post
I haven't gotten around to that yet. Wasn't sure if it was needed since I have no compression on that cyl and the plug looked like somebody hit it with a hammer. Funny thing is that the motor still runs. If it weren't for the lack of Vacuum when that cyl fires and the fact that it doesn't have compression on that cyl. Idles fine and doesn't make noise yet. I think I just caught it at the start. I am sure if i keep running it there will be a big mech failure (worse than I have now).
on the contrary. You want to do a leakdown on a cylender With No or bad compression #'s to determin weither it is top end or bottom end. And were the compression loss is generating ie. Intake/exhaust/cooling system/oiling system/ or Cylender blow by.
__________________
TLCA # 20314
84 Hilux, 22re Conversion, 63" chevy rears, Rears up front, Bobbed bed, duel e-lockers, 5.29's, 35" Ground Hogs low compression
Step by Step Bed Bob
Reply With Quote
  #8  
Old 06-15-2010, 01:54 PM
Air Randy's Avatar
Air Randy Air Randy is offline
Cruise Moab Committee
 
Join Date: Aug 2008
Location: Franktown, CO
Posts: 2,804
Default

Do a simple compression test on all 6 cylinders, that will give you a much better idea if you need a total rebuild or just a valve job. If the other 5 cylinders are all within 10% of each other and not too low compared to the factory spec (be sure and adjust for the elevation difference:actual reading divided by .86) you can probably get by without a full rebuild. 0 compression on 1 cylinder could be a blown head gasket, a burnt valce or a cracked valve seat. All are fixed by pulling the head as the first step.

If the engine isn't burning oil in addition to the #2 cylinder issue you probably should just do the valve job.

I am not a big fan of installing used engines unless you are totally desperate or unless you know the engine's real history. Otherwise you could go to a lot of effort to install something that could start giving you a lot of trouble right away.
__________________
Randy Rosetta KDKWX TLCA #19351 69 FJ40 "Meanie" & 1970 Boss 302 Mustang
Reply With Quote
  #9  
Old 06-15-2010, 06:40 PM
MattFJ40 MattFJ40 is offline
Rock Stacker
 
Join Date: Jun 2010
Location: Colorado
Posts: 12
Default

Quote:
Originally Posted by Air Randy View Post
Do a simple compression test on all 6 cylinders, that will give you a much better idea if you need a total rebuild or just a valve job. If the other 5 cylinders are all within 10% of each other and not too low compared to the factory spec (be sure and adjust for the elevation difference:actual reading divided by .86) you can probably get by without a full rebuild. 0 compression on 1 cylinder could be a blown head gasket, a burnt valce or a cracked valve seat. All are fixed by pulling the head as the first step.

If the engine isn't burning oil in addition to the #2 cylinder issue you probably should just do the valve job.

I am not a big fan of installing used engines unless you are totally desperate or unless you know the engine's real history. Otherwise you could go to a lot of effort to install something that could start giving you a lot of trouble right away.
I did a compression test on all 6. The motor was cold since I didn't want to run the motor to get it to operating temp. The other 5 had compression that were just OK. One had a zero reading (tried 3 times). No burning of motor oil that I can see. To be honest I have only put 100 miles or so on it since the last change, but 70 of those were hard miles on Moab trails.

I pulled the valve cover, but didn't see anything (untrained eye though). I guess the next step is to pull the head. Then it will be a paperweight so I am not excited about that.
Reply With Quote
  #10  
Old 06-15-2010, 07:25 PM
MattFJ40 MattFJ40 is offline
Rock Stacker
 
Join Date: Jun 2010
Location: Colorado
Posts: 12
Default

Quote:
Originally Posted by nakman View Post
This guy can make your 2F scream like a newborn.. http://www.risingsun4x4club.org/foru...ad.php?t=10843

(in a good way!)
Anybody else had good luck with Robbie doing work on your rig? I talked to him on the phone and he seems like a good guy.

Nakman - How many miles do you have on your rebuild? Was he able to get the project done on-time/on-budget?
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 02:21 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.