Datatype Error

Here a4e the values I am passing in
articleID = 17
Keywords = car|boat
categoriesRemove = 1,4,14


ALTER PROCEDURE [dbo].[GetArticlesByKeywords]
@articleID int,
@Keywords VARCHAR(MAX),
@categoriesRemove nvarchar(100)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

declare @MySQLPart varchar(4000)

SET @MYSQLPART = 'SELECT DISTINCT articleKeywords.articleID,
articles.articleTitle,
articles.articleSummary
FROM articleKeywords
LEFT OUTER JOIN articles
ON articleKeywords.articleID = articles.articleID
WHERE (articleKeywords.articleKeyword IN (SELECT data
FROM dbo.FUNCTION_STRING_TO_TABLE (''' + @Keywords + ''',''|'' ) AS function_string_to_table_1))
AND (articleKeywords.articleID <> ' + @articleID + ')
AND (NOT (articles.categoryID IN (' + @categoriesRemove + ')))'
EXEC (@MYSQLPART)
END




************ERROR*********************

Conversion failed when converting the varchar value 'SELECT DISTINCT articleKeywords.articleID,
articles.articleTitle,
articles.articleSummary
FROM articleKeywords
LEFT OUTER JOIN articles
ON articleKeywords.articleID = articles.articleID
WHERE (articleKeywords.articleKeyword IN (SELECT data
FROM dbo.FUNCTION_STRING_TO_TABLE ('car|boat|van','|' ) AS function_string_to_table_1))
AND (articleKeywords.articleID <> ' to data type int.