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Something horrible just have happened

Started by chiz, November 22, 2019, 03:56:13 PM

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chiz

Hello all
        I just re checked my clearances after installing shims a few weeks ago...All the confederate OK except one
      Which is on the extreme car left intake side...The clearance on this valve is 3/32 or .0880 yes you read it right.

     When I turn the engine with the two intake loves car left pointing toward the preconditions and bucket at a certain will grip a  .OO8 feeler where as the love next to it needs a .014 both loves in same position.

       I have broken my neck to look at this valve down the intake port while turning the engine the valve is moving...don,t know if this proves anything.

    Please what do you folks think I have done and what do you think the fix is????

      Thanks  Chiz

Pat Conlon

Quote from: chiz on November 22, 2019, 03:56:13 PM

     When I turn the engine with the two intake loves car left pointing toward the preconditions and bucket at a certain will grip a  .OO8 feeler where as the love next to it needs a .014 both loves in same position.


Hey chiz, can you say this ^^ again? I can not understand what you're saying...
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

FJmonkey

Quote from: Pat Conlon on November 22, 2019, 07:04:13 PM
Quote from: chiz on November 22, 2019, 03:56:13 PM

     When I turn the engine with the two intake loves car left pointing toward the preconditions and bucket at a certain will grip a  .OO8 feeler where as the love next to it needs a .014 both loves in same position.


Hey chiz, can you say this ^^ again? I can not understand what you're saying...

Pat, I think he meant this:

 When I turn the engine with the two intake lobes pointing away from bucket, an .OO8 feeler passes where as the lobe next to it needs a .014 both lobes in same position.
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

chiz

Well I slept on this issue and have come to the dreaded conclusion that I ent the end of the cam.This happened I think when a quarter got pinched by the love while turning the motor..after you guys stop shaking your heads can you tell me if the motor is ruined?

   This will add to my collection of ruined stuff of late,desktop,snowblower and bike.If it is not toast what is the fix and how?

   Will a cam replacement work and is this possible with the motor in frame??  Still wrapping my head around the force required.

  Chic

Pat Conlon

Take a picture of the cam lobe for us.

*if needed* You can replace the intake cam without removing the engine from the bike.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

chiz

Hi  I'm going to remove far left cap and try to strait edge the lobes..Ha ha take a pic this will stretch my  limits
As I killed my desktop and this Amazon fire tablet is horrible but who knows..

      I think you could almost notice a3/32 bend??

                          Chiz

chiz

Pics pics Straight edgeing the lobes no real stand out things wereseen????????

chiz


RPM - Robert

Chiz, please start over from the beginning your auto-correct on your phone has made the initial post in comprehensible.

You have several different measurements listed and recommendations cannot be provided until everything is cleared up. Can you take some pictures that are clear and in focus as wll

chiz

OK. I hate this device I really want to smash the stuffing out of it.

      So I checked my clearances after start up...All checked out OK except one, the intake lobe farthest left this measures out at 3/32  .0880. whereas the lobe right next to it is .006.

     As you all can see this is very disturbing,the valve for the offending lobe is moving up and down viewed down the intake port. Was thinking end of cam bent because of trapped pinched quarter. But with cap removed there seems to be no noticeable difference between the two.

Chiz

FJ_Hooligan

The chances that you have "bent" a cam due to an improper shim size are pretty much impossible.

It would take TONS of force to bend a cam, especially getting it bent between two adjacent lobes.

If anything, you could damage a lobe surface. 

Your measurement technique must be flawed. Were you using a quarter to help swap shims around?  Is it still "trapped"?  What cap have you removed?
DavidR.

chiz

Cap for for left intake cam removved. Just checked wit short straight edge across the top of good lobe to errant lobe at several different points around the lobes NO difference.

     What I noticed though with intake and exhaust  cams in clearence checking position#1 cyl that the bucket for offending lobe is half the hight above the head casting as the good lobe. hmmmmm.

  This leads me to wonder if the bucket is sticking or the valve and spring are funny. I replace the cap and see if this changes anything

racerrad8

Quote from: chiz on November 24, 2019, 10:50:15 AM
Cap for for left intake cam removved. Just checked wit short straight edge across the top of good lobe to errant lobe at several different points around the lobes NO difference.

     What I noticed though with intake and exhaust  cams in clearence checking position#1 cyl that the bucket for offending lobe is half the hight above the head casting as the good lobe. hmmmmm.

  This leads me to wonder if the bucket is sticking or the valve and spring are funny. I replace the cap and see if this changes anything

It is time for a compression check.

If the bucket is not coming all the way up, that is usually one of two things. But since it is an intake valve, I am thinking only one thing...

A bent valve.  :negative:

We have seen the exhaust valve seats fall out of the race car heads and cause excessive clearance or just the opposite, no clearance. But, if when you got that quarter stuck, you rotated the engine and the valve was still open the piston could have contacted it and bent the valve. The compression test will confirm if the valve is bent.

I have only seen a handful of broken valve springs in more than twenty years and they were all in the race car application and aftermarket springs. I doubt there is any bucket or spring problem.

One last thing as I write. If the quarter got stuck and displaced any of the aluminum around the bucket, that could be keep it from coming all the way out of the bore.

Compression check and then if no compression, pop the cam out and see if you can get the bucket out. If not that is where you need to start. Maybe the valve wasn't held open far enough the hit the piston. If the bucket comes out, then the valve is bent.

Keep us posted on your findings.

Randy - RPM
Randy - RPM

chiz

I like it will keep you posted....how to get out the cam??

        Chiz

racerrad8

Quote from: chiz on November 24, 2019, 03:35:17 PM
..how to get out the cam??

        Chiz
Compression test first before camshaft removal.

Randy - RPM
Randy - RPM