Eric Boullier has moved to play down the severity of the rift between McLaren and Honda.
Reports from Barcelona on Tuesday said that "huge" pressure had opened up between the two sides as Honda grapples with engine problems for the third consecutive year.
Yet McLaren boss Boullier said that McLaren and Honda are sticking together.
"We have a contract," he said. "A long-term contract, and we want to build on it even if it is not ideal times.
"Seriously, we don't think about these things. Even if there are difficulties, a separation is absolutely not an issue."
While he admitted that every McLaren-Honda fan is right to be "losing patience" with the situation, Boullier said that the current problems are not as bad as 2015.
"It seems complicated to the outside world," the Frenchman is quoted as saying by Germany's Auto Bild, "but internally, two problems are always the same.
"We know we can solve this problem. We must be able to rely on our partner, and we do."
"For Australia we will have a new engine and we hope that all the problems are solved. What I don't know yet is if we can have it (the new engine) this week," he is quoted as saying by Spain's El Pais.
Some reports, however, insist that separate to Honda's problems, the new McLaren chassis is also not handling well around Barcelona.
"I read some articles and I think of Donald Trump and his 'fake news'," Boullier said.
"We have a good car, even though the McLaren here is not the McLaren you will see in Australia.
"But the forecasts at the moment are that we will probably have to change some engines in the first races."
The race weekend in Australia begins on March 24.
