a6t8vw Posted November 20, 2007 Share Posted November 20, 2007 hey guys, i bought a '88 chevy truck that has a '96 lt1 corvette motor , anyway I bought this truck to pull the motor and use in my Z Theres about 750 miles on the motor since it was rebuilt. bigger valves were installed and a grand sport cam making it a LT4? This was a kids project that was never finished.. its about 95% done. I've been driving the truck around breaking in the motor and im having a over heating problem but only when i go uphills and pull grades. Im not sure if the radiator is just too small (2 core) or the transmission fluid running through the radiator is getting hot making the coolant temp rise. when i go uphill or about 220*(measured from the cyl head) the coolant in the reservoir is boiling out the cap vent line.. It might even be the installed height of the reservoir bottle? i know in the corvette the motor is higher than the radiator and coolant bottle/reservoir? Might even be where the coolant reservoir is "TEE'ed into the heater hoses? heres some more pic's of the current setup, all comments welcome Quote Link to comment Share on other sites More sharing options...
typhoone Posted November 20, 2007 Share Posted November 20, 2007 ^^^^ ....his user-name....???? Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted November 20, 2007 Share Posted November 20, 2007 ^^^^....his user-name....???? That stooge is history.... LARRY Quote Link to comment Share on other sites More sharing options...
80LS1T Posted November 20, 2007 Share Posted November 20, 2007 What are the two posts above all about? The engine bay looks all cobbled up! You probably need to bleed the cooling system. Jack up the front end and take the radiator cap off and then let it run and top it off. Did you get a good deal on the whole truck? Also what tranny is mated up to it? Guy Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted November 20, 2007 Share Posted November 20, 2007 What are the two posts above all about? Guy A post was deleted that was written by a new member who is now banned. We all can return now to the thread's subject matter.... LARRY Quote Link to comment Share on other sites More sharing options...
wheelman Posted November 20, 2007 Share Posted November 20, 2007 The intake elbow and water pump are from a B-Body LT1 but the heads look to be aluminum. Makes me wonder what this engine really is. When you pull it from the truck drop the oil pan and let us know if it has 2 or 4 bolt main bearing caps. 2 bolts = not a Corvette engine. BTW: What is a Grand Sport cam? I've heard of the LT4 cam refered to as the LT4 Hot Cam but not a Grand Sport cam. Wheelman Quote Link to comment Share on other sites More sharing options...
a6t8vw Posted November 20, 2007 Author Share Posted November 20, 2007 yes i did get a good deal on the truck, traded for a dirt bike. lol.. I've tried bleeding the air out of the system many times and different methods The trans is a "goodfellas" enforcer 700r4 I'm just tryin to get the bugs worked out before i pull the motor. Quote Link to comment Share on other sites More sharing options...
Bartman Posted November 20, 2007 Share Posted November 20, 2007 An LT1 motor with an LT4 cam is not an LT4, there are other differences as well. http://www.malcams.com/legacy/misc/LT4.htm As you're probably already aware there are problems using the Corvette accessories when installing the LT1 engines into our Z's. I'm not sure about you're overheating issues, but the hose routing does look overly cluttered. I would eliminate the breathers as well as all air the engine needs should be metered. You may wind up ahead getting the problems worked out and selling the truck with the engine in it. The truck looks pretty nice and you could probably get more for it than it would cost to buy another engine for your Z. Good luck. Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted November 20, 2007 Administrators Share Posted November 20, 2007 If it is in fact out of a '96 Vette, it is (or was) an LT4. Quote Link to comment Share on other sites More sharing options...
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