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Old 10-14-2014, 10:10 PM   #1
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Default GM 3800 TIMING COVER PROPLEMS DID GM MESS UP

in closed first is a few pictures of our beloved 3800 timing covers
seams left side inside of timing cover has a leak and corrosion
problems

first picture from 2006 model
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Old 10-14-2014, 10:13 PM   #2
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now is picture from
2008 model
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Old 10-14-2014, 10:18 PM   #3
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we have seen at least 5 of these all have corrosion
in same area
with different kinds of antifreeze
looks like here is why
3 picture is right side of TC with the 3 inch bolt and water pump in place
note thread length
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Old 10-14-2014, 10:21 PM   #4
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now is left side of TC were the corrosion is and signs of leakage
note thread length
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GM 3800 TIMING COVER PROPLEMS DID GM MESS UP-tc-6.jpg  

Last edited by REGAL GUY; 10-14-2014 at 10:22 PM. Reason: picture
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Old 10-14-2014, 10:27 PM   #5
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now more pictures of how there is not enough thread length
left side has all most 3/4 inch of thread length for clamping force
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GM 3800 TIMING COVER PROPLEMS DID GM MESS UP-tc-4.jpg   GM 3800 TIMING COVER PROPLEMS DID GM MESS UP-tc-3.jpg  
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Old 10-14-2014, 10:32 PM   #6
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these are with factory 3 inch 5/16 water pump bolts
seams like answer is a 5/16 3 1/4 flange bolt not easy to come by
lacks just little of being same thread length as right side
picture inclosed
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Old 10-14-2014, 10:42 PM   #7
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I just wondering did anyone ever notice this
we are going to use new TC with a ZZ performance
thicker TC gasket they sell intended for clearance with a
double row timing chain they sell
all so any one wants factory kind of water pump bolts
DORMAN 902-803 fits picture unclose
they fit all of our late model cars
but they don't say so
about $13.00 on eBay
just wondering any ones thoughts on this
we found the 5/16 3 1/4 flange bolts after much
searching but now wondering if 5/16 3 1/4 studs might be better
for more clamp force
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