The new 6.2L LT1 engine debuts in the 2014 Chevrolet Corvette Stingray and represents the most significant redesign in the small block’s nearly 60-year history – building on its legacy to make.
- While corvette lt1's had 300 hp, f-body lt1's only made 275 & 290 hp. Other platfom lt1's made 260 hp I believe. Your 330 hp in the boat could have been because boat motors are not rated for hp as strictly as car motors. Or it could be anlt4 engine that did make 330 hp in a vette. If it is a lt4 engine then heads are different than lt1.
- View and Download Chevrolet 1994 Corvette owner's manual online. 1994 Corvette automobile pdf manual download. Page 229 Service and Appearance Care Power Curves LT1 Engine 140 w ENGINE SPEED-RPM,228 Power Curves LT5 Engine HORSEPOWER ENGINE SPEED-RPM 300 0 150 2 Belt Routing.
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This is my first Thread to TT. I'm in Ireland and so I need some help from you guys State Side. I purchased my first boat (a 1999 Maristar 200VRS with LT-1 Corvette 350hp engine in it last July) Love the boat as do all the family. Since getting the boat I have followed alot of your Threads and needless to say its a great source of information.
Was out in the boat 2 days ago when I noticed fluff and bits of rubber in the engine compartment. I figured out it was the Engine Belt for the water pump and alternator. The Belt is totally gone but the guy who sold me the boat happened to have a spare one for that boat when he sold it to me. It is the correct belt for the LT-1 engine.
Anyway I got the belt onto the crankshaft drive pulley and the alternator pulley but I was having difficulty getting the belt over the belt tensioner. I downloaded the 1999 Maristar manual from the MC website but it only gives information about the Vortec MX Plus engine (which has the adjustable alternator mounting - the LT-1 does not have the adjustable alternator mounting). The manual goes on to say that on engines with serpentine belt systems, no change in necessary - belt tension is maintained by the automatic belt tensioner. The relvent page from the Manual (1999 Mastercraft Owners Manual Page 49 in the PDF document in the My Mastercraft section of hte MC site) I confirm that end of my engine looks like the diagram. I could not upload the relevant page for you - sorry!
I did loosen the nuts around the belt tensioner wheel and it would only move up the way (this did not help as I need the wheel to move down the way to get the belt over it) I then open up the nut in the center of the belt tensioner wheel and lifted off the wheel. underneath the wheel I found a nut in the center which can be loosened with an allen key (don't know if you call them the same thing its a screw with needs a hexagonal key inserted into it to unscrew it). I unscrewed it and this made the entire unit come slightly out of it's housing but it also dropped down the belt tensioner unit enough for me to pull the belt over the unit with the wheel back on it. It would not let me tighten the hexagonal screw inside the tensioner unit back to it's original position (when I did it just moved the unit back up and made it too tight to get the wheel back on with the belt over it.) I thought maybe the unit (to include the hexagonal screw) would automatically tighten up the unit and tighten it back into the housing and also push the belt tensioner wheel up higher to tighten up the belt itself. I fired up the engine and let it run for 10 minutes but it did not tighten up the unit behind the wheel or the belt itself. I know there must be some sort of a trick to this problem and I hope you can help.
The belt should be tight enough so it will deflect 1/4'-1/2' when pressed with the thumb. Mine deflects about 4'-6' When I start the engine the belt is working and the alternator is turning over but I understand if it is too loose the alternator will not get a proper charge and it will lead to the belt wearing out too quickly. Also the Belt tensioner wheel does not spin around as the belt runs over it (I'm not sure if it is meant to spin or not and maybe you guys will know the answer)
So couple of question for you
1. Does the Belt Tensioner wheel usually spin around when the engine is running with engine belt running over it?
2. Is there some trick to getting the belt onto the LT-1 (as it does not have the adjustable alternator)?
3. Should I have to open up the belt tensioner and going adjusting the hexagonal screw inside it?
4. It I do need to adjust that Hex screw how do I get it to tighten up and let me still get the wheel back on it and the belt over it?
Sorry this is so long but I thought I better give you as much information to help rule things out.
Help please!
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Mastercraft Corvette Lt1 Engine Owners Manual Pdf
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