* ECB holds rates at 1.5 percent
* Trichet sees "intensified" downside economic risks
* Bank was split on rate decision after discussing cuts
* Announces new 1-year liquidity operations to support banks
* Restarts covered bond purchases, to spend 40 billion euros (Adds context, details)
By Paul Carrel
BERLIN, Oct 6 (Reuters) - The European Central Bank reinstated some of its most potent crisis-fighting tools on Thursday in response to intensifying euro zone troubles, but opted to keep interest rates at 1.5 percent despite some of the bank's policymakers calling for cuts.
At Jean-Claude Trichet's last policy meeting as ECB President, he warned the bank saw "intensified" threats to the euro zone economy from the debt crisis and slowing global economic growth.
He said it will offer struggling banks two new injections of ultra-cheap 1-year funding and buy another 40 billion euros ($54 billion) of 'covered bonds' -- assets backed by mortgage loans or public sector lending and perceived as safe to own.
"The economic outlook remains subject to particularly high uncertainty and intensified downside risks," Trichet told a news conference, offering a more gloomy prognosis than last month when he merely talked of downside risks.
That shift in rhetoric will encourage investors to believe a rate cut is not far away. Trichet stoked expectations further by saying policymakers had discussed cutting rates this month, but stopped short of suggesting it was a done deal.
"There has been a discussion of the pros and cons of decreasing rates, as well as the pros and cons of maintaining rates where they are," he said, added that the bank was split over its decision to keep rates on hold.
The ECB has raised rates twice this year and may have been swayed from going into reverse immediately by inflation hitting 3.0 percent last month, well above its target of close to but below 2 percent.
"Inflation has remained elevated ... and is likely to stay above 2 percent in the months ahead but to decline thereafter," Trichet said, an assessment little changed from last month.
Trichet gave special emphasis to the decisions the ECB had taken to reinstate ultra-supportive lending operations and its new wave of bond purchases, underscoring the separation it maintains between interest rates and crisis-fighting measures.
The bank, however, opted to remove the phrase that its interest rates remain "accommodative," a move likely to further encourage rate cut talk, although economists said the timing or likelihood were far from certain.
Although the ECB uses a well-defined set of key words in its monthly policy statements to flag rate hikes ahead, it has yet to establish a similar vocabulary for the way down, making Trichet's statements harder to interpret.
"It wasn't immediately obvious. There weren't any big hints that it (a rate cut) would be at the next meeting," said Barclay's Economist Julian Callow. "It would tend to imply it wants to go slow in terms of cutting rates from here."
LITTLE SENTIMENTALITY, MORE LIQUIDITY
Little fuss was made about Trichet's last rate meeting. Jens Weidmann, the head of Germany's Bundesbank which hosted the Berlin meeting, one of two per year that the ECB holds outside Frankfurt, offered warm words on behalf of the Governing Council.
With trademark composure Trichet said he remembered his first news conference eight years ago, as if it were yesterday, noting the tough periods the bank had faced during his time.
"We were never in calm waters," he told reporters. "But for more than four years now, we have been experiencing turbulent waters, storms, unexpected hurricanes."
The ECB's interest rate decision was in line with the results of a Reuters poll of economists in which 56 of the 76 economists questioned saw rates being left unchanged while 20 expected a decrease.
The Bank of England, in contrast, surprised markets on Thursday by announcing it was ready to inject 75 billion pounds more new money into the flagging UK economy.
The ECB sought to help banks withstand a further worsening of the European sovereign debt crisis and growing tension in the interbank market by renewing offers to lend them one-year funding in two operations, this month and in December. (for story click )
It also extended its guarantee of providing funding limit-free in its other operations until the middle of next year.
Extra-long 12-month liquidity tenders were first introduced in June 2009. The first such offer attracted record-breaking demand of 442 billion euros and sent market rates plunging drastically, easing banks' funding costs.
The European Union executive is drafting plans for member states to coordinate a recapitalisation of banks, as regulators meet to check the capital buffers of stressed lenders they had granted a clean bill of health in July.
Over the past couple of weeks, concern about the risks of a Greek default has grown and banks have grown increasingly wary of lending to each other.
Trichet repeated calls for governments to solve the bloc's debt crisis but continued to draw the line at other crisis-fighting roles for the ECB, including the idea of turning the European Financial Stability Facility (EFSF) bailout fund into a bank that can tap the central bank for funds.
"The Governing Council does not consider it would be appropriate that the central bank would leverage the EFSF," he said.
At the same time he called for euro governments to do all they could to leverage the firepower of the aid fund "to the maximum amount" to fight the crisis.
($1 = 0.746 Euros) (Additional reporting by Eva Kuehnen and Sakari Suoninen, writing by Marc Jones)