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Jun 16, 2014 2:57 pm
Jun 16, 2014 2:57 pm
Subject: Re: 4.5 litre engine problems and upgrades
Hi James,
Likewise, I am sorry to hear about your own problems.
The circumstances that you describe for your engine failure are almost identical to mine. 500 slow miles since rebuild, steep hill 2000 revs, 60mph, 75 degrees C, loss of power, etc… The only difference being that it was No1 piston on my car that seized. However, on my car we had not closed off, or partially closed off, any of the side transfer ports.
I am not sure I understand if the Evans could have made matters worse but am open to any explanation. I knew that something was wrong because I was almost expecting it and so stopped pretty promptly. I don’t think I could have reacted sooner even if I had been using water rather than Evans.
I am pinning my hopes on the new block with matching pistons, rings, conrods, and oil pump all coming from LMB. However, there is clearly a need to improve circulation of coolant (Evans or water) so am really keen to understand whether there is a need to blank off ports or add a hose at the front of the engine etc.
David Hine’s very helpful workshop manual suggest a possible problem with the water pump bearings possibly seizing if they get too hot but as the pump is mechanically driven from the engine we can’t see how that could happen. I wouldn’t be against fitting an electrical pump if I thought it would eliminate a potential problem. Any thoughts?
Your 1,000 mile trial sounds like the perfect test and if you manage to come through that I am sure you will survive anything so please let me know how you get on. You aren’t going to be doing any running in by the sounds of it. Good luck – plenty of us wishing you luck and are waiting to hear!
David
Hi James,
Likewise, I am sorry to hear about your own problems.
The circumstances that you describe for your engine failure are almost identical to mine. 500 slow miles since rebuild, steep hill 2000 revs, 60mph, 75 degrees C, loss of power, etc… The only difference being that it was No1 piston on my car that seized. However, on my car we had not closed off, or partially closed off, any of the side transfer ports.
I am not sure I understand if the Evans could have made matters worse but am open to any explanation. I knew that something was wrong because I was almost expecting it and so stopped pretty promptly. I don’t think I could have reacted sooner even if I had been using water rather than Evans.
I am pinning my hopes on the new block with matching pistons, rings, conrods, and oil pump all coming from LMB. However, there is clearly a need to improve circulation of coolant (Evans or water) so am really keen to understand whether there is a need to blank off ports or add a hose at the front of the engine etc.
David Hine’s very helpful workshop manual suggest a possible problem with the water pump bearings possibly seizing if they get too hot but as the pump is mechanically driven from the engine we can’t see how that could happen. I wouldn’t be against fitting an electrical pump if I thought it would eliminate a potential problem. Any thoughts?
Your 1,000 mile trial sounds like the perfect test and if you manage to come through that I am sure you will survive anything so please let me know how you get on. You aren’t going to be doing any running in by the sounds of it. Good luck – plenty of us wishing you luck and are waiting to hear!
David