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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

lt1 coolant crossover tube question

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Old 10-03-2010, 05:38 PM
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Default lt1 coolant crossover tube question
Anyone ever delete this tube from your heads?? Wondering if I can. Can't find new gaskets anywhere.
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Old 10-03-2010, 05:41 PM
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Dont delete it, you need it.

These are the seals to get, Chevy dealers should have them.
Last edited by LT1; 10-03-2010 at 05:49 PM.
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Old 10-03-2010, 05:57 PM
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Originally Posted by LeonbergerG
Anyone ever delete this tube from your heads?? Wondering if I can. Can't find new gaskets anywhere.
Rubber Oil pan drain plug gaskets will work fine. Same thing without gm raping you.
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Old 10-03-2010, 06:32 PM
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you need it.
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Old 10-03-2010, 06:56 PM
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For about $60 in parts, you can make the tube with AN fittings if you're interested.
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Old 10-03-2010, 07:05 PM
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A/C compressor washers work too and they are cheap.
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Old 10-03-2010, 07:26 PM
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No an fittings on this car. But what if the motor is going in an older car that doesn't have the fitting on the radiator??
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Old 10-03-2010, 07:30 PM
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Originally Posted by LeonbergerG
No an fittings on this car. But what if the motor is going in an older car that doesn't have the fitting on the radiator??
I would install a tee on the return line of the heater hose, or have a fitting welded on the radiator tank.
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Old 10-03-2010, 07:31 PM
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How neccesary is it.
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Old 10-03-2010, 07:34 PM
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Originally Posted by LeonbergerG
How neccesary is it.
Very. It pulls any excess steam buildup in the heads out and back to the radiator where it condenses and rejoins the cooling system. Without it the steam would build up and develop hot spots.
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Old 10-03-2010, 07:42 PM
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Ok. Makes sense now. That's all due to the reverse flow water right.
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Old 10-03-2010, 07:50 PM
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Originally Posted by LeonbergerG
Ok. Makes sense now. That's all due to the reverse flow water right.
Yes when the thermostat is open coolant is really flowing threw that line.
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Old 10-04-2010, 11:43 AM
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Napa had some oil plug gaskets in stock 1.87each. Better then 7+ dollars from gm that they needed to order
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Old 10-04-2010, 12:39 PM
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The actual seal that is specific for the crossover and ac lines is like $22/each. Outrageous.
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Old 10-04-2010, 12:55 PM
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Got my seals from Jason Cromer (850-244-5165)

$19.76 for all 4, Part #10108689 (as in pic above.)
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Old 10-04-2010, 02:08 PM
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Originally Posted by LeonbergerG
Napa had some oil plug gaskets in stock 1.87each. Better then 7+ dollars from gm that they needed to order
7041093 is the napa part number. I'm using them, they work great.
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Old 10-04-2010, 03:13 PM
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Originally Posted by Wicked94Z
7041093 is the napa part number. I'm using them, they work great.
10-4 got em today will be installing tomorrow
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