Before the start of day's play on Monday in the India-New Zealand Test at the M Chinnaswamy Stadium, Kirmani was seen passing on few tips to the New Zealander.
Kirmani, the local man and now the director of Karnataka State Cricket Association's RC-KSCA Academy, was at the ground talking to the curator when Van Wyk approached him.
"I was by the pitch-side talking to the curator about pitches for our academy. He (Kruger van Wyk) came up to me and asked whether he could discuss wicketkeeping with me," Kirmani told Thatscricket.
"Van Wyk said he was happy to spot me on the ground. He asked me whether his keeping was alright," Kirmani, who played 88 Tests for India, added.
Kirmani was quick to point out Van Wyk's flaw. He said the Kiwi was on his heels rather being on his toes.
"I have noticed him being on his heels while keeping. That is not right," he said.
The 32-year-old Van Wyk is playing his seventh Test. This is his first tour to India. On Sunday, he was injured after being hit on his forearm by an Umesh Yadav delivery and was not be behind on the stumps on Monday.
Kirmani said it was not necessary to change one's technique.
"Each wicketkeeper has his own technique. When you look at Dhoni, he too has his own. It is important to concentrate on the results rather than technique," he advised.
The 62-year-old Kirmani also pointed out it was important to learn from the legends of your time.
"I learnt a lot watching the best keepers of my time. Alan Knott (England), Rodney Marsh (Australia) and Ian Smith (New Zealand) were the best," he said.
Kirmani finished his career with 160 catches and 38 stumpings in 88 Tests.
Van Wyk has sought more time with Kirmani and the Bangalore man said he is available at the ground. The New Zealander is likely to pick Kirmani's brains again, later in the day.