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One additional note...even if the valves don't bend, anything related to the rebuild or replacement to this head will result in more $$$ as these factors relate specifically to the valves. In other words...it's a trade off if you choose the Volvo with the B234 as opposed to the B230F or FD or T, etc. Yes, you might notice some performance difference, but, there is a price to off set.
Having said that, if the price issue doesn't worry you too much, by all means, disreguard it. I'm not the advocate for either engine, I simply like to know all the information before I make an educated decision. It is quite possible that the B234 engine, in question, could last for another 80K miles without major incident. At an additional 80k miles, it's almost like getting a relatively brand new car. I hate to say it but, ask a bunch of people who like domestic vehicles if they would buy a car with 100K+ miles and expect to get an additional 80k miles out of it...and see what there reply is.
P.S. I'm not certain of the "D" designation either. I would guess that it implies some sort of upgrade to the B230F. However, I'm not privy to the specifics of that engine upgrade. I'm sure the engineers took a "solid" engine and found some way to improve on it. This sounds like a question for abe crombie or "protege".
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