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

Low Compression After Rebuild

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Old Aug 31, 2013 | 07:29 PM
  #21  
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From: Big Bear Lake, Cali
The lady at the DMV said I was the 5th owner.
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Old Aug 31, 2013 | 07:32 PM
  #22  
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I've downloaded the FSM off the net, downloaded a program called 'Open It' but I can't get the FSM to open, it's a RAR file.
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Old Aug 31, 2013 | 07:34 PM
  #23  
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Originally Posted by big bear
I've downloaded the FSM off the net, downloaded a program called 'Open It' but I can't get the FSM to open, it's a RAR file.
My computer skills suck, I'm a lot better with a wrench and socket set.
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Old Aug 31, 2013 | 07:36 PM
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Download a program called WinRAR.
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Old Aug 31, 2013 | 08:10 PM
  #25  
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From: Big Bear Lake, Cali
Originally Posted by Cyberman
Download a program called WinRAR.
Downloaded it, it won't work.
Says it's experiencing problems, launch me again.

Tried again, same thing.

Thanks though.
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Old Aug 31, 2013 | 08:58 PM
  #26  
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Replace timing components to spec and to proper set-up would be a good start ^_^.

-Engine re-built... including top end(cylinder heads)...?

-Valve clearance correct...?
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Old Aug 31, 2013 | 09:35 PM
  #27  
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From: Big Bear Lake, Cali
Originally Posted by Kiroshu
Replace timing components to spec and to proper set-up would be a good start ^_^.

-Engine re-built... including top end(cylinder heads)...?

-Valve clearance correct...?
Going to turn the sprockets around tomorrow.

Heads were micro-fluxed, valves 3 angle grind, re-seated, new seals and adjusted by a machine shop.

I've double checked the clearances, they're in spec.
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Old Sep 1, 2013 | 06:45 AM
  #28  
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From: Big Bear Lake, Cali
I' going out there to turn those sprockets over.

I'll take some pix.
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Old Sep 1, 2013 | 08:00 AM
  #29  
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The marks should line up.

Left
Low Compression After Rebuild-img_3798s.jpg

Right
Low Compression After Rebuild-img_3799s.jpg
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Old Sep 1, 2013 | 08:06 AM
  #30  
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Thanks for the pix.
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Old Sep 1, 2013 | 08:22 AM
  #31  
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Ok gents.

TDC, timing mark pointing at 0, rotor pointing at #1 spark plug.
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Found this, needs to be fixed for sure.
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How they were when I first took the motor apart.

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Flipped and torqued, 80ft #s

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Tool shot, my home made sprocket tool, bottom right, works very well.
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After install.
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Left sprocket, marks line up great.
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Right sprocket, here's what I meant when I stated the marks are a little ambiguous. Mark won't line up perfectly, mark lines up a little behind or I could set it a little ahead, but not dead on.
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I'm holding at this point to see what you guys think, set mark behind like it is now, or move it a tooth ahead ??
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Old Sep 1, 2013 | 09:17 AM
  #32  
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Looks to be a tooth behind. IIRC, the timing mark on the sprocket will be in the exact 12 o'clock position when everything is lined up.

This may help.
Another source: http://personal.utulsa.edu/~nathan-b...67timingbe.pdf

Last edited by rworegon; Sep 1, 2013 at 09:34 AM.
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Old Sep 1, 2013 | 09:55 AM
  #33  
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From: Big Bear Lake, Cali
Wink

Originally Posted by rworegon
Looks to be a tooth behind. IIRC, the timing mark on the sprocket will be in the exact 12 o'clock position when everything is lined up.

This may help.
Another source: http://personal.utulsa.edu/~nathan-b...67timingbe.pdf
Alright, moved the sprocket forward a tooth, the sprocket mark is just past the timing cover mark, but is at 12 o'clock now.

Thanks for the FSM link, I downloaded one from a different site, it was in RAR format and I wasn't having much luck getting it to open, your version is in PDF, sweet.

Looks like I'll go button things up and see how she runs, take care of the cracked hose too.
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Old Sep 1, 2013 | 09:58 AM
  #34  
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Kinda hard to tell, considering it looks like you're using a used timing belt. New belts usually have timing marks on them as well. Your gear marks look dead on though.
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Old Sep 1, 2013 | 10:53 AM
  #35  
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From: Big Bear Lake, Cali
Originally Posted by Cyberman
Kinda hard to tell, considering it looks like you're using a used timing belt. New belts usually have timing marks on them as well. Your gear marks look dead on though.
That's what those dashed lines are for, live and learn.

It's a brand new Gates belt, bought a full timing component kit.
There was no way I was going to re-use the ITM belt it had on it.
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Old Sep 1, 2013 | 02:18 PM
  #36  
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From: Big Bear Lake, Cali
Just waiting for the RTV to cure before I re-fill the rad and fire it up.
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Old Sep 1, 2013 | 02:20 PM
  #37  
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so you think having those pulleys reversed was the issue?
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Old Sep 1, 2013 | 02:28 PM
  #38  
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Not really, but as Kiro said getting things as they are in the book is a good place to start.

Did more the right cam clock-wise 1 tooth, see what that does.
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Old Sep 1, 2013 | 02:32 PM
  #39  
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Oh yeah, found that cracked hose too.
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Old Sep 1, 2013 | 02:37 PM
  #40  
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i suppose if those pulleys were on backwards the valve timing couldve been off slightly. that hose could have caused a bad vacuum leak creating the low power condition you were describing.
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