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Engine Are dowel pins needed to align a front timing cover?

  • Thread starter Thread starter evintho
  • Start date Start date Feb 23, 2024

evintho

20+ Year Stangneter
Nov 12, 2003
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#1
  • Feb 23, 2024
  • #1
I have a front seal leak (just a drip really) on my newly rebuilt '93 5.0. Question: Am I missing dowel pins that need to align the timing cover so the crank is centered in the TC bore?
This pic is from teardown and I don't remember any dowel pins.



This is after I pulled the balancer to try to address the leak.

 

nickyb

I gotta say i never painted my nuts, Never Ever
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#2
  • Feb 23, 2024
  • #2
How's the balancer look?
 

evintho

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683
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#3
  • Feb 23, 2024
  • #3
Not bad. The rubber part of the seal bottoms out on top of that ridge. From the base of the balancer to the top of ridge is about 7mm. It's also 7mm from the metal face of the seal to the rubber part. The motor had 90k well cared for miles before the rebuild.

 

evintho

20+ Year Stangneter
Nov 12, 2003
683
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Santa Rosa, CA.
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#4
  • Feb 23, 2024
  • #4
Well.....I think I've found the issue. No dowel pins! Just ordered a pair from LMR.

 

Bullitt347

I have been doing it wrong this whole time
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#5
  • Feb 23, 2024
  • #5
Where do they go?
I have never seen a dowel pin on a SBF timing cover.
 

evintho

20+ Year Stangneter
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Santa Rosa, CA.
Feb 23, 2024
#6
  • Feb 23, 2024
  • #6
Bullitt347 said:
Where do they go?
I have never seen a dowel pin on a SBF timing cover.
Click to expand...

https://lmr.com/item/388192SK/1979-95-Mustang-Timing-Cover-Dowels?utm_source=google&utm_medium=cpc&adpos=&scid=scplp&sc_intid=&gad_source=1&gclid=EAIaIQobChMIxP7O9OPChAMVfTjUAR0mBQuDEAQYASABEgJOCvD_BwE

 
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limp

wrap a little cheese around it and its a done
5 Year Member
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#7
  • Feb 23, 2024
  • #7
Even so, do not tighten your timing cover until you install your balancer.. After installing the balancer make sure the timing cover is loose enough to center it as best you can where the seal surrounds the balancer contact .....
 

General karthief

wonder how much it would cost to ship you a pair
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#8
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limp said:
Even so, do not tighten your timing cover until you install your balancer.. After installing the balancer make sure the timing cover is loose enough to center it as best you can where the seal surrounds the balancer contact .....
Click to expand...
That's what the dowels are for, I believe they are just tube that presses into a machine shoulder at the bolt hole, that's why the timing cover is such a PITA to remove/install with the oil pan on, those dowel pins (or alignment pins) kinda center the seal on the crank snout (as the children snicker in the background)
 
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manicmechanic007

5 Year Member
Sep 26, 2017
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#9
  • Feb 24, 2024
  • #9
Correct
They are sleeves around the bolts like the block has to locate the heads
 
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Bullitt347

I have been doing it wrong this whole time
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#10
  • Feb 24, 2024
  • #10
manicmechanic007 said:
Correct
They are sleeves around the bolts like the block has to locate the heads
Click to expand...
Yes, but that is not what I would call a "dowel pin". Thus my statement about not ever seeing "dowel pins" on a SBF for the timing cover. They are just called alignment dowels. Like the following kit from Summit Racing:

https://www.summitracing.com/parts/cca-235

Whereas, these are dowel pins used to align a cylinder head on a SBC:

https://www.summitracing.com/parts/pio-s-1110
 

limp

wrap a little cheese around it and its a done
5 Year Member
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#11
  • Feb 24, 2024
  • #11
Even with the " alignment dowels" I still think you are better off NOT tightening the timing chain cover until you install the balancer... That couple of thousandths movement might make a difference.....
Make sure you put a little grease on the seal too for start up....
 
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General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
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#12
  • Feb 25, 2024
  • #12
Bullitt347 said:
but that is not what I would call a "dowel pin".
Click to expand...
You are correct, technically, in mechanic speak......now get off my lawn
 
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G

GOvert

15 Year Member
Jan 27, 2007
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Mar 16, 2024
#13
  • Mar 16, 2024
  • #13
With the dowel alignment "sleeves", the timing cover only can sit in one position.
 
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