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Old 01-15-2012, 12:17 PM
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Trans flange interfers with exhaust

Last night I bolted my 1994 4.3 CHevy V6 to a 2004R trans. The drivers side top exhaust manifold bolt is too close to a flange on the transmission. I probably could grind off the flange with no damage to the trans or look for a different manifold. Any thoughts would be appreciated. Thanks, Tom
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Old 01-15-2012, 01:25 PM
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Before I changed anything I would make sure it clears the steering box and anything else in there. Brake lines and safety valve are somwhere closeby.
You could run shorter studs and try to bend the exhaust around the trans housing, or if the manifold is an absolute must use item, hack off the ear on the trans. I dont think the 4.3 makes enough horsepower that cutting the edge off the trans wouldcause any strength issues.
Looks like shorter studs and deleting the spring/nut setup for just nuts would be the combo you could use, and not chop the trans.
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Old 01-15-2012, 01:57 PM
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What connects to that hole in the trans ear?
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Old 01-15-2012, 01:58 PM
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One of the pre-installation modifications on some of the late model/engine swap header installations is to cut off the flange on each side of the trans. For pipe clearance
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Old 01-15-2012, 09:21 PM
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Another thing you might try to find-my 86 GMC 1/2 ton PU came out with a 4.3 and it had factory headers. They actually were nice for factory stuff and they cleared real well. It also had a 3 speed manual on the column and cleared all the linkages as well. If you want to use the ones you have, it won't be a problem to trim the trans. I have seen several over the years.
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Old 01-16-2012, 04:37 AM
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Is that a S-10 Manifold in the Pic?
A C-10/15 Manifold is much shorter & will clear.

Example 94 C-1500 > http://www.rockauto.com/catalog/moreinfo.php?pk=262050

S-10 Pic > http://www.rockauto.com/catalog/moreinfo.php?pk=262045
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Old 01-16-2012, 05:19 PM
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Quote:
Originally Posted by techinspector1
What connects to that hole in the trans ear?
The inspection cover that 50% of people don't re install?? I have been guilty of that before.
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Old 01-16-2012, 10:23 PM
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Yes, the engine is out of a 1994 S10 Bazer. I'll look at some of the options each of you have mentioned and see what I can find. Thanks or all the help.

Tom
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Old 01-17-2012, 08:21 AM
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Quote:
Originally Posted by latech
try to bend the exhaust around the trans housing,
Looks like shorter studs and deleting the spring/nut setup for just nuts would be the combo you could use, and not chop the trans.
X2^^^^^^^if you can get the studs out, I would just use a bolt instead
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