Honda Prelude Forum
 
Go Back   Honda Prelude Forum > Tech-Talk > 3rd Gen Honda Prelude

Thread Title
New headgasket, new problems

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 06-27-2012, 09:34 PM
I'm New
 
Join Date: May 2011
Posts: 11
iTrader: (0)
redhenracing2 is on a distinguished road
New headgasket, new problems

So I just finished up the headgasket on my wifes '88 si, and there are a couple of minor issues.

- the fuel injectors are leaking like crazy where they go into the fuel rail. Is there an o-ring or something that I may have forgotten there? Gas just starts spraying everywhere as soon as the pump clicks on.

- the exhaust cam is too hard to turn. I noticed this when installing the timing belt and getting the cams aligned by hand, but put it on together anyway. I figured once some oil got circulated it would free up. That didn't happen. Did I maybe over torque the cam journal bolts? Anything else that would cause that?
Reply With Quote
  #2 (permalink)  
Old 06-27-2012, 10:10 PM
Silver Member
 
Join Date: Oct 2010
Location: Atlanta area
Posts: 258
iTrader: (0)
TripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond repute
Re: New headgasket, new problems

1. Yes, there is a set or seals and o-rings for the injectors. Fuel is dangerous when it leaks, and I recommend you remove the battery until it is fixed. FYI, a water hose will not extinguish most gasoline fires. You need a fire extinguisher handy.

2. Did you apply assembly lube when installing the cam? How hard are we talking here, like more force than 20 ft/lbs? Did you loosen the valves before removing the cam? Have you performed valve lash according to the Free Online Service manual?

Link to the Free Online Service Manual:
Prelude Bible Repair Manuals Diagrams Part Number

Link to valve lash adjustment procedure:
http://www.preludebible.com/service-...adjustment.pdf

Link to fuel injectors manual pages:
http://www.preludebible.com/service-...-injectors.pdf
Reply With Quote
  #3 (permalink)  
Old 06-28-2012, 10:04 AM
I'm New
 
Join Date: May 2011
Posts: 11
iTrader: (0)
redhenracing2 is on a distinguished road
Re: New headgasket, new problems

I'll have to get those seals and o-rings. I probably have them and didn't realize it, there were several pieces leftover in my gasket kit, several of which I could not identify.

I put some oil on the cam journals before I reinstalled the cam. It is hard to turn but can still be turned by hand. It just takes some effort, unlike the intake cam. I did not loosen the valves, do valve lash, or any of that. I just took it apart and put it back together.

This was my first time going this far into an engine, I expected a few mistakes.
Reply With Quote
  #4 (permalink)  
Old 06-29-2012, 10:04 PM
Silver Member
 
Join Date: Oct 2010
Location: Atlanta area
Posts: 258
iTrader: (0)
TripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond reputeTripleLude has a reputation beyond repute
Re: New headgasket, new problems

In that case, make sure the t-belt is on right. Do not let the crank turn backwards after you install it. If it turns backwards, it may skip teeth and inadvertently throw off the timing, then bend valves upon startup. I'd say this is the tricky part, especially for the B20a5 engine's crank pulley. See the image below for the tool that I use to hold the pulley rock solid.

The flywheel has one "T" mark for 0* (TDC), and 3 other marks for 15*. Line the timing belt up on the flywheels "T" mark. You want to assemble the t-belt in a clean, well lit area. Line everything up perfect and tension it according to that Free Online Manual.

After it is tensioned, turn the crank around and around in forward direction about 3-4 rotations, then check that the flywheel mark and cam marks still line up. Sometimes you will notice the intake cam gear will be off a tooth. sooooo....

After slipping the belt on, install the t-belt lower cover (plastic part hard to reach bolts), then install the crankshaft and torque it to 80-ish? ft/lbs or so. Then, you can loosen the t-belt tensioner and adjust your cams a tooth or so as you check it. Then turn the crank around and around to check again until you know it is correct.

You will need a set of cheap feeler gauges to adjust the valves. Here is the manual for the procedure:
http://www.preludebible.com/service-...adjustment.pdf

Adjusting the valves has a very specific procedure. The per-cylinder adjustment process is not in order, but if you can see the marks on the cam gears, you can adjust the valves. Always do a last check after tightening a valve locknut. You will need to hold the flat-tip adjusting screw still while tightening the locknut with a wrench.

I use a Duralast brand Chain Wrench:


Duralast parts are some of the worst, but Duralast tools are some of the best. Expensive, but I hate breaking tools and having to stop in the middle of a task.

Feeler Gauges cost between $3 and $30:

Last edited by TripleLude; 06-29-2012 at 10:17 PM.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Headgasket or Waterpump? jdm98lude 5th Gen Honda Prelude 11 11-16-2011 03:03 PM
Quick Headgasket help please RexUnderBoost 3rd Gen Honda Prelude 6 08-18-2010 11:31 PM
headgasket replacement codytheoutlaw 4th Gen Honda Prelude 5 05-09-2009 06:07 PM
headgasket KTanner88 4th Gen Honda Prelude 2 05-04-2009 03:20 PM
headgasket 97lude General Tech Talk 19 02-12-2009 08:41 PM


All times are GMT -4. The time now is 02:13 PM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors


Copyright © 2006-2009 PreludeZone.com All Rights Reserved.