LS1TECH - Camaro and Firebird Forum Discussion

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

lt1 coolant crossover tube question

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Old Oct 3, 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 Oct 3, 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; Oct 3, 2010 at 05:49 PM.
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Old Oct 3, 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 Oct 3, 2010 | 06:32 PM
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you need it.
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Old Oct 3, 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 Oct 3, 2010 | 07:05 PM
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A/C compressor washers work too and they are cheap.
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Old Oct 3, 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 Oct 3, 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 Oct 3, 2010 | 07:31 PM
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How neccesary is it.
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Old Oct 3, 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 Oct 3, 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 Oct 3, 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 Oct 4, 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 Oct 4, 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 Oct 4, 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 Oct 4, 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 Oct 4, 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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