6.0 flexplate on my 5.3 HELPPP!!!!!!
11-24-2012, 12:19 PM
#1
6.0 flexplate on my 5.3 HELPPP!!!!!! I currently have my motor on the engine stand, yesterday I bought a 6.0 flex plate from an LQ 4 engine. Today I wanted to hook up battery to the starter to crank my motor to see if I'm getting proper oil pressure. The problem is that when I torque the flexplate bolts down it hits the starter housing and locks the motor. Its a clearance issue.
11-24-2012, 01:26 PM
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The 5.3 flexplate is offset out and the 6.0 flexplate is flat so that's why you are having a clearance issue...it had to do with the different crank lengths. Do a search on here there is plenty of threads on it. What trans are you using you may need a spacer?
11-24-2012, 03:50 PM
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I think with a 4l80e you need to put the spacer between the crank and flexplate. I'm not entirely sure. I know with my offset flexplate (5.3 style) and a th350 I needed to put the spacer between the stall and flexplate but that's because the th350 has a shorter shaft because the sbc had a longer crank. I'm sure since your fexplate is flat it needs the spacer between the crank and fp to make up for the lost length that the offset flexplate makes up for.
I could've sworn I had a thread on this bookmarked but I can't find it....might be on my work computer, I'll post it if I find it.
I could've sworn I had a thread on this bookmarked but I can't find it....might be on my work computer, I'll post it if I find it.
Last edited by snyousef; 11-24-2012 at 03:56 PM.
11-24-2012, 10:03 PM
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Basically the dished (5.3 style) fp made up for the shorter crank by its "dish" and the spacer was used with older transmissions since they have shorter input shafts since the sbc crank was longer. For the flat (6.0 style) fp a spacer was placed on the crank to space the fp out to make up for the shorter crank.
OP, you need the spacer that goes on the crank (crank/spacer/flexplate/converter) for the 4l80e with the flat fp. IIRC the 6.0 motors came with this spacer stock when using the 4l80e trans.
