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Pontiac Forum: Engine Mounts
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  #11  
Old January 17th, 2018, 11:19 PM
Randy68 Randy68 is offline
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Thanks for the help!! It is greatly appreciated!!! I know I will be back with more questions and I will keep you posted on the install!!
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  #12  
Old February 5th, 2018, 03:39 PM
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Well as for the problem, a few issues are eliminated... The crossmember and motor mounts are correct. I took out the engine/tranny and put it in my old subframe and it fits so the only thing it could be now is the NEW Goodmark Subframe... I am talking to the company where I bought it about the issue but there not helping. So the issue is the holes for the frame motor mounts are not the same as my original subframe. I was going to drill new holes but they are too close to the original ones and I am not exactly sure where to mount the frame mounts so the engine sits wherever it is suppose to be. I took a lot of measurements with my old subframe and going to try to duplicate to the new subfame... The new subframe isn't exact as my original subframe so kind of shooting from the hip. Any advice would be great!! Thanks
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  #13  
Old February 5th, 2018, 06:15 PM
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All I can do is send good wishes, sounds like you are on the right track, I don't have any experience with aftermarket sub frames. Sorry
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  #14  
Old February 5th, 2018, 08:33 PM
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you cannt weld a plate over/under the holes and redrill the correct hole locations?
or weld the holes closed and redrill?
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  #15  
Old February 6th, 2018, 09:12 AM
Randy68 Randy68 is offline
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My plan is to locate the block in the frame and see how far I am off.. I cant weld a plate underneath as there is no access. I am thinking to elongate the holes and bolt them in as long as it doesn't interfere with the A Arms and then weld the plates onto the subframe...Welding the holes closed is another possible option... My main concern is how do I know exactly where the engine is suppose to go? Im going off my old subframe that I do not know the history of it but it did have a 400 engine in it previously even though it was a dog!
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  #16  
Old February 6th, 2018, 10:25 AM
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I thought you could take the measurements off the old subframe but not sure how difficult that would be.
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  #17  
Old February 6th, 2018, 12:53 PM
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That is my intention but it is like trying to measure a piece of spaghetti. My old subframe varies from 1/4 to 1/2" to the new subframe and not knowing the history of the car as if it got hit or not... So I am going to find centerline of both subframes, square off the front 1" gauge hole and measure back to the engine mounts and crossmember... Transfer those measurements to the new subframe using its centerline.... Mark it and bolt/weld it...Thoughts??
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  #18  
Old March 13th, 2018, 12:34 PM
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Conclusion on motor mount

Well what a journey... The engine is in!! The new Goodmark Subframe that was purchased was wrong... The holes for the drivers side engine frame mount were off by 3/8"... I ended up modifying the engine frame mounts to make it work! Thanks again for all the help and I am sure I will have more questions.
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  #19  
Old March 13th, 2018, 03:35 PM
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and of course Goodmark admits no error! Glad to hear you got past that hurtle.
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